Effective communication is an essential part of patient-centered care. The complexity of cancer care in older adults makes communication challenging, particularly when older patients have cognitive deficits and lose their autonomy. This paper describes the development, implementation, and evaluation of a communication skills training module for health care providers (HCPs) who work with older adults with cancer, with or at risk of developing cognitive deficits.

Using a pre-post single arm study design, 99 HCPs from a comprehensive cancer center in North-East USA, who worked primarily with geriatric patients, participated in the study. Participants included Advance Practice Providers (including Nurse Practitioners and Physician Assistants; n = 24, 24.2%); nurses (n = 23, 23.2%), social workers (n = 14, 14.1%), physicians (n = 13, 13.1%), and “other” HCPs (including occupational therapists, physical therapists, and psychologists; n = 20, 20.2%). The HCPs participated in a one-day geriatric communication skills training program in groups of 12–15 over a 2-year period. Participants complete pre-post surveys on module evaluation and perception of self-efficacy as well as pre-post video-recorded Standardized Patient Assessment (SPA) to evaluate communication skill uptake.

Most participants evaluated the module positively; over 90% indicated that they agreed or strongly agreed with five of the six module evaluation items. HCPs’ self-efficacy in communicating with cancer patients with cognitive deficits significantly increased from pre- to post-module training. There was a significant increase in the following communication skill use from pre- to post-training: checking patient preferences, declaring agenda, and inviting agenda.

Results demonstrated a successful implementation of the program as evidenced through favorable program evaluation, significant gains in self-efficacy, as well as significant improvement in several communication skills.

Many caregivers report finding positive meanings in their caregiving roles and activities. The positive aspects of caregiving (PAC) scale was designed to measure positive appraisals of caregiving. This study assessed the reliability and validity of the Korean version of the PAC for family caregivers of people with amyotrophic lateral sclerosis (ALS).

The instrument's content and semantic equivalence were established using translation and back translation of the PAC. A convenience sample of 127 family caregivers of patients with ALS in Korea was recruited. Content, construct, and convergent validity of the Korean PAC were evaluated. Cronbach's α was used to assess reliability. This study used secondary data; the primary study received approval from the Institutional Review Board of H Hospital, from where data were collected. The consent forms did not mention the future use of data. Therefore, we have applied for approval regarding this study's protocol and exemption from informed consent.

The Cronbach's α was 0.92, and internal consistency was acceptable. Exploratory factor analysis supported the construct validity with a two-factor solution explaining 74.73% of the total variance. Regarding convergent validity, the Korean PAC score negatively correlated with caregiver burden and depression and positively with self-rated health status. We were unable to evaluate the suitability of the suggested structural dimensionality through confirmatory factor analysis. Furthermore, as we used secondary data, we could not assess retest reliability for the evaluation of the scale's stability.

The Korean PAC was found to be an applicable instrument with satisfactory reliability and validity and suitable for further use as a measure for positive appraisals of caregiving for family caregivers of people with ALS. It may be effective for measuring caregivers’ psychological resources.

Advanced care planning (ACP) is central to patients' dignity and autonomy; however, in many countries it is underutilized. Studies that tested the effects of palliative care (PC) often included the rate of documented ACP as a secondary end point. We aimed to assess the contribution of PC to the rate of ACP among terminally ill patients by systematically reviewing relevant clinical trials.

PUBMED and “Cochrane trials” databases were screened for clinical trials published until October 2017 that compared the addition of PC to standard treatment and that had ACP as a primary or a secondary end point. Studies were assessed for validity by three investigators using the Cochrane Collaboration tool and the ROBINS-I tool for randomized controlled trials (RCTs) and for cohort studies, respectively.

Twenty-six trials with 37,924 patients were included. Four were RCTs, nine were cohort studies, and 12 were cross-sectional studies. Randomized trials had the lowest risk of bias. There was a positive correlation between the addition of PC and ACP in 25 studies, among them four randomized trials.

In this systematic review, PC was associated with improvement in the rate of ACP. Understanding the significant effect of PC on the completion of ACP is an additional emphasis on the importance of this treatment among terminally ill patients.

Retinoblastoma is the most common primary intraocular tumor of childhood with >95% survival rates in the US. Traditional therapy for retinoblastoma often included enucleation (removal of the eye). While much is known about the visual, physical, and cognitive ramifications of enucleation, data are lacking about survivors' perception of how this treatment impacts overall quality of life.

Qualitative analysis of an open-ended response describing how much the removal of an eye had affected retinoblastoma survivors' lives and in what ways in free text, narrative form.

Four hundred and four retinoblastoma survivors who had undergone enucleation (bilateral disease = 214; 52% female; mean age = 44, SD = 11) completed the survey. Survivors reported physical problems (n = 205, 50.7%), intrapersonal problems (n = 77, 19.1%), social and relational problems (n = 98, 24.3%), and affective problems (n = 34, 8.4%) at a mean of 42 years after diagnosis. Three key themes emerged from survivors' responses; specifically, they (1) continue to report physical and intrapersonal struggles with appearance and related self-consciousness due to appearance; (2) have multiple social and relational problems, with teasing and bullying being prominent problems; and (3) reported utilization of active coping strategies, including developing more acceptance and learning compensatory skills around activities of daily living.

This study suggests that adult retinoblastoma survivors treated with enucleation continue to struggle with a unique set of psychosocial problems. Future interventions can be designed to teach survivors more active coping skills (e.g., for appearance-related issues, vision-related issues, and teasing/bullying) to optimize survivors' long-term quality of life.

Dependency on others can compromise self-determination for older persons in the palliative phase in residential care. Family members can support the residents' self-determination but may also jeopardize it. Quality of care (QoC) is linked to respecting the autonomy of the residents and providing opportunities to participate in decision-making. The aim of the study was to provide knowledge about residents' and family members' perceptions of QoC and self-determination and to detect possible differences between their experiences.

This cross-sectional study used an abbreviated version of the questionnaire, Quality from the Patients' Perspective, with additional items about decision-making. Wilcoxon's signed rank test was used to analyze the perception of QoC and to detect differences between residents' and family members' perceptions.

QoC was perceived as lower than preferred in the majority of items and there was a high level of agreement between residents and family members. Lowest mean values in QoC were found in: support when feeling lonely; support when feeling worry, anxiety or fear; and staff's time to talk to the residents. Decision-making in everyday life and in life-changing situations showed that neither residents nor family members trusted staff to know about the residents' preferences.

Broad improvements are needed, especially in psychosocial care. Several of the negative outcomes on QoC and self-determination seem to derive from a focus on practical tasks and the lack of trustful relationships between residents and staff. An early implementation of palliative care, with a focus on what brings quality to each resident's life, could facilitate QoC and self-determination, in both everyday life and at the end of life.

Dignity therapy (DT) is well established in adult populations, and it is likely that it could benefit younger people. This study aimed to adapt the adult Portuguese DT question framework for adolescents (DT-QF-Adol) (ages 10–18).

Five stages were followed: (1) the Portuguese DT-QF for adults was adapted for adolescents with the original author's collaboration, (2) an expert committee provided feedback on the adapted version, (3) an initial consensus version of the DT-QF-Adol was created, (4) expert committee consult affirmed final consensus, and (5) validation stage with a sample of 17 adolescents followed in ambulatory psychology clinic.

DT's original author endorsed the final Portuguese DT-QF-Adol, reinforcing that it captures the fundamental dimensions of DT. There was 100% agreement on the final consensus version and defined age group (10–18 years old). Twenty adolescents were invited to participate, and 17 were included after informed consent was obtained; 53% were female. The average age was 12.7 years. The interviewed adolescents reported that the DT-QF-Adol was clear, and they did not identify any ambiguity or difficulty in answering any of the questions. They assumed that this information could positively affect the way parents and friends see and cared for them, permitting others to understand their concerns and preferences. Participants felt that the DT-QF-Adol could be a good starting point for a conversation with their loved ones. Although they did not consider vital for health professionals to access their answers, they strongly felt that the DT-QF-Adol might be essential to sick adolescents and they would recommend it to others.

We developed a DT-QF of nine questions for Portuguese adolescents (DT-QF-Adol), coined Protocolo de Perguntas da Terapia da Dignidade para Adolescentes — 10–18 anos. This tool can potentially be considered a good addition for pediatric palliative care.

Suicidal ideation (SI) underlies risk of death by suicide. It is well established that patients with cancer are at increased risk of death by suicide. Therefore, understanding SI in patients with cancer is critically important. The goal of this systematic review was to investigate the prevalence, risk factors, intervention, and assessment of SI in patients with cancer.

This systematic review was registered with the PROSPERO database (CRD42018115405) and was guided by the PRISMA statement. We searched Medline, PsycInfo, Embase, CINAHL, the Cochrane Database of Systematic Reviews, and Cochrane Central. Two reviewers independently screened abstracts and assessed for quality assurance using a revised Newcastle-Ottawa Scale.

We identified 439 studies to screen for eligibility. Eligible studies included adults with cancer diagnoses and listed SI as an outcome. Ultimately, 44 studies were included in the analyses. Prevalence of SI ranged greatly from 0.7% to 46.3%. Single items drawn from validated measures were the most frequent method of assessing SI (n = 20, 45.5%); additional methods included validated measures and psychological interviews. Commonly identified risk factors for SI included age, sex, and disease/treatment-related characteristics, as well as psychological constructs including depression, anxiety, hopelessness, existential distress, and social support.

Assessment of SI in patients with cancer is the concern of researchers worldwide. Prevalence of SI varied with study population and was likely influenced by the method of assessment. Psychological distress consistently predicted SI. Increasing awareness of demographic, clinical, and psychological associations is critical for risk assessment and intervention development.

The growing aging population and the high prevalence of several concomitant chronic diseases have contributed to the elevated rates of caregiver burden and suffering in patients. In turn, intending to relieve unnecessary pain in patients, there has been a rapid growth of outpatient palliative care programs. However, little has been studied about caregiver burden as a relevant factor potentially affecting the effectiveness of these programs. This study aimed to determine the extent of caregiver burden as a possible mediator on the effectiveness of a home-based palliative care program.

Sixty-six palliative patients (56% women; mean age + SD = 71, 6 ± 17.7) and their caregivers were assessed with measures for physical, emotional, and psychological symptoms before and 1 month after the start of a home-based palliative care program.

The association between caregiver burden and palliative outcomes was corroborated with a categorical regression model (p < 0.01). Caregiver burden was found to be a significant mediator in the relationship between outcome measures for palliative care at baseline and after 1 month of enrollment in the program.

To our knowledge, this is the first study to assess the role of caregiver burden in the effectiveness of a home-based palliative care program. Although further work is required, the results indicate that a patient-focused intervention does not have the same beneficial effect if the caregiver burden is not addressed. Future home-based palliative care programs should focus on caregivers as well as patients, with particular attention to psychosocial intervention on caregivers.

Symptoms of depression and anxiety are common in neuroendocrine tumor (NET), yet controversy exists over whether serotonin-mediated antidepressants (SAs) are safe in this population. We sought to address this knowledge gap.

Following PRISMA guidelines, we conducted a systematic review to identify NET patients who were prescribed SA.

We identified 15 articles, reporting on 161 unique patients, 72 with carcinoid syndrome (CS) and 89 without. There was substantial agreement between reviewers at the full-text stage (κ = 0.69). Three of the articles, all with low risk of bias, accounted for most of the cases (149/161; 93%). Among the 72 NET patients with CS prior to antidepressant usage, CS was exacerbated in 6 cases (8%), only 3 (4%) of whom chose to discontinue the antidepressant. The remaining 89 patients had no prior CS symptoms, and none developed CS following antidepressant usage. Overall, no instances of carcinoid crisis or death were reported.

We found no evidence for serious adverse outcomes related to SA usage in NET patients. Previous authors have recommended avoiding antidepressants in NET, but our findings do not support those recommendations. Oncologists should nonetheless monitor for symptom exacerbation when prescribing SA to patients with NET.

This study was conducted to evaluate the validity and reliability of the “Nurse Spiritual Care Therapeutics Scale” in Turkish nurses.

This study was a psychometric design. A convenience sample of 249 nurses working at the Malatya Training Research Hospital completed a structured questionnaire including demographic characteristics and the Nurse Spiritual Care Therapeutics Scale (NSCTS) between August and October 2018. Principal components analysis, internal consistency reliability, and Cronbach's α were used to measure the psychometric properties of the items of the scale.

In the evaluation of construct validity, identified one factor with eigenvalues greater than 1 explained 50.83% of the total variance. The Cronbach's α value of the scale is 0.86.

The present study provides evidence of NSCTS's validity, reliability, and acceptability. The scale can be used by Turkish nurses. This scale should be further evaluated with a larger sample in different regions in Turkey and various populations. The scale has potential applications for use both in research and as a screening tool in clinical settings.

Asia's first national advance care planning (ACP) program was established in Singapore in 2011 to enhance patient autonomy and self-determination in end-of-life (EoL) care decision-making. However, no known study has examined the extent to which ACP in Singapore successfully met its aims. The purpose of the current study was to examine the attitudes of local healthcare professionals on patients’ autonomy in decision-making at the EoL since they strongly influence the extent to which patient and family wishes are fulfilled.

Guided by the Interpretive-Systemic Framework and Proctor's conceptual taxonomy of implementation research outcomes, an interview guide was developed. Inquiries focused on healthcare professionals’ attitudes towards ACP, their clinical experiences working with patients and families, and their views on program effectiveness. Sixty-three physicians, nurses, medical social workers, and designated ACP coordinators who were actively engaged in ACP facilitation were recruited from seven major hospitals and specialist centers in Singapore through purposive sampling. Twelve interpretive-systemic focus groups were conducted, recorded, transcribed, and analyzed using a thematic analysis.

The extent to which patients in Singapore can exert autonomy in EoL care decision-making is influenced by five themes: (i) collusion over truth-telling to patient, (ii) deferment of autonomy by patients, (iii) negotiating patient self-determination, (iv) relational autonomy as the gold standard and (v) barriers to realization of patient choices.

Healthcare practitioners in Asian communities must align themselves with the values and needs of patients and their family and jointly make decisions that are consistent and congruent with the values of patients and their families. Sensitivity towards such cross-cultural practices is key to enhancing ACP awareness, discourse, and acceptability in Asian communities.

The debate regarding euthanasia and physician-assisted suicide (E/PAS) raises key issues about the role of the doctor, and the professional, ethical, and clinical dimensions of the doctor-patient relationship. This review aimed to examine the published evidence regarding the response of doctors who have participated in E/PAS.

Original research papers were identified reporting either qualitative or qualitative data published in peer-reviewed literature between 1980 and March 2018, with a specific focus on the impact on, or response from, physicians to their participation in E/PAS. PRISMA and CASP guidelines were followed.

Nine relevant papers met selection criteria. Given the limited published data, a descriptive synthesis of quantitative and qualitative findings was performed. Quantitative surveys were limited in scope but identified a mixed set of responses. Where studies measured psychological impact, 30–50% of doctors described emotional burden or discomfort about participation, while findings also identified a comfort or satisfaction in believing the request of the patient was met. Significant, ongoing adverse personal impact was reported between 15% to 20%. A minority of doctors sought personal support, generally from family or friends, rather than colleagues. The themes identified from the qualitative studies were summarized as: 1) coping with a request; 2) understanding the patient; 3) the doctor's role and agency in the death of a patient; 4) the personal impact on the doctor; and 5) professional guidance and support.

Participation in E/PAS can have a significant emotional impact on participating clinicians. For some doctors, participation can contrast with perception of professional roles, responsibilities, and personal expectations. Despite the importance of this issue to medical practice, this is a largely neglected area of empirical research. The limited studies to date highlight the need to address the responses and impact on clinicians, and the support for clinicians as they navigate this challenging area.

The objective of this study was to describe in the words of child-rearing parents with incurable cancer, what they had gained or thought about as a result of participating in a five-session, scripted, telephone-delivered psycho-educational parenting intervention, the Enhancing Connections Program in Palliative Care.

A total of 26 parents completed the program. Parents’ responses were audio-recorded and transcribed verbatim and verified for accuracy. The analysis proceeded through four steps: unitizing, coding into categories, defining categories, and formation of a core construct that explained parents’ attributed gains. Trustworthiness of study results was protected by coding to consensus, formal peer debriefing, and maintaining an audit trail.

Although 50% reached or exceeded clinical cutoff scores on anxiety and 42% reached or exceeded clinical cutoff scores on depressed mood, parents extensively elaborated what they gained. Results revealed six categories of competencies they attributed to their participation in the program: (1) being ready for a conversation about my cancer, (2) bringing things out in the open, (3) listening better to my child, (4) getting my child to open up, (5) not getting in my child's way, and (6) changing my parenting.

Despite an extensive symptom burden, parents with incurable cancer attributed major gains from a brief, fully scripted, cancer parenting communication intervention. A manualized telephone-delivered educational counseling program for symptomatic parents with incurable cancer has the potential to augment competencies for parents as they assist their children manage the cancer experience.

B vitamins are essential for the functioning of the nervous system. Vitamin B1 (thiamine) deficiency is associated with neuropsychiatric syndromes such as Wernicke's encephalopathy (WE), which, if untreated, has an estimated mortality of 17–20%. Although the prevalence of thiamine deficiency in the general population is difficult to estimate, it is being increasingly recognized in oncology, especially in the inpatient setting. We describe three cases of thiamine deficiency (TD) in the outpatient psychiatric oncology setting.

Retrospective chart review of three adult patients, who were seen in the psychiatric oncology clinic and found to have TD on laboratory testing, was done. Patient, disease, and thiamine treatment-related information were obtained, and descriptive statistics were used to analyze the data.

The average age was 59 years, mean body mass index (BMI) was 22.00 ± 4.58 (mean ± SD), and mean thiamine level was 59.10 ± 7.69 that ranged from 45 to 68 nmol/L (normal thiamine level reference: 70–180 nmol/L). None of the patients had brain imaging nor cerebrospinal fluid analysis. Risk factors such as unbalanced nutrition, prior GI surgery, renal disease, and chemotherapy were noted.

TD can have a multifactorial etiology in oncology. Identification of TD in both inpatient and outpatient setting is important. Our report highlights how early identification of TD in the outpatient setting can help prevent further clinical progression.

Informal caregiving may likely increase as the number of cancer survivors grows. Caregiving responsibilities can impact caregivers’ quality of life (QOL). Understanding the current state of the science regarding caregiving QOL could help inform future research and intervention development.

A systematic literature review in PubMed/Medline examined research on QOL among informal cancer caregivers and related psychosocial health outcomes. Original research articles in English, published between 2007 and 2017 about caregivers (aged >18 years) of adult cancer patients in the United States were included. Abstracted articles were categorized according to caregiving recipient's phase of survivorship (acute, middle to long-term, end of life/bereavement).

Of 920 articles abstracted, 60 met inclusion criteria. Mean caregiver age ranged from 37 to 68 with the majority being female, non-Hispanic white, with at least a high school degree, and middle income. Almost half of the studies focused on caregivers who provided care for survivors from diagnosis through the end of active treatment. Studies examined physical health, spirituality, psychological distress, and social support. Differences in QOL were noted by caregiver age, sex, and employment status.

Additional research includes the examination of the needs of diverse cancer caregivers and determines how additional caregiver characteristics (e.g., physical functioning, financial burden, etc.) affect QOL. This includes studies examining caregiver QOL in the phases following the cessation of active treatment and assessments of health systems, support services, and insurance to determine barriers and facilitators needed to meet the immediate and long-term needs of cancer caregivers.

The objective of this study is to map the existent research undertaken in Australia into broad thematic areas and identify the characteristics of the studies and areas of future research in the literature.

A scoping review methodology was employed to map the current areas of research undertaken in Australia since January 2000 until the end of December 2018 according to years of publications, types of studies, populations studied, research themes, and areas of focus.

Our review identified 1,405 Australian palliative care research publications between January 2000 and December 2018. Nearly 40% of the studies were quantitative (39%) and a third were qualitative studies (31%). The remainder of the studies were reviews, mixed methods, quality improvement projects, and others. One-third (30%) of the research was done with carers' participants followed by nurses (22%) and doctors and physicians (18%). The most frequently reported diagnosis in the studies was cancer with 42% of the publication total. The most frequently explored theme was physical symptoms (such as pain, breathlessness, nausea, delirium, and dyspnea) with a total of 16% of all articles followed by communication (15%). There was a large gap to the next most frequently explored theme with service delivery (9%) and coordination of care (8%). Assessment of patients (7%), end-of-life decision-making (6%), and rural/regional (6%) all produced a similar number of publications. Very few studies addressed topics such as quality of life, E-Health, after-hours care, spirituality, and health economics. Moreover, there were only 15 (1%) studies focused on the last days of life.

The current review presented a comprehensive search of the literature across almost two decades in Australia in the palliative care setting. It has covered a breadth of research topics and highlighted urgent areas for further research.

Guidelines for palliative and spiritual care emphasize the importance of screening patients for spiritual suffering. The aim of this review was to synthesize the research evidence of the accuracy of measures used to screen adults for spiritual suffering.

A systematic review of the literature. We searched five scientific databases to identify relevant articles. Two independent reviewers screened, extracted data, and assessed study methodological quality.

We identified five articles that yielded information on 24 spiritual screening measures. Among all identified measures, the two-item Meaning/Joy & Self-Described Struggle has the highest sensitivity (82–87%), and the revised Rush protocol had the highest specificity (81–90%). The methodological quality of all included studies was low.

While most of the identified spiritual screening measures are brief (comprised 1 to 12 items), few had sufficient accuracy to effectively screen patients for spiritual suffering. We advise clinicians to use their critical appraisal skills and clinical judgment when selecting and using any of the identified measures to screen for spiritual suffering.

Integrating spiritual care into multidisciplinary care teams has seen both successful thoughtful collaboration and challenges, including feelings of competition and poor cross-disciplinary understanding. In Israel, where the profession is new, we aimed to examine how spiritual care is perceived by other healthcare professionals learning to integrate spiritual caregivers into their teams.

Semi-structured qualitative interviews of 19 professionals (seven physicians, six nurses, three social workers, two psychologists, and one medical secretary) working with spiritual caregivers in three Israeli hospitals, primarily in oncology/hematology. The interviews were transcribed and subjected to thematic analysis.

Respondents’ overall experience with adding a spiritual caregiver was strongly positive. Beneficial outcomes described included calmer patients and improved patient–staff relationships. Respondents identified reasons for a referral not limited to the end of life. Respondents distinguished between the role of the spiritual caregiver and those of other professions and, in response to case studies, differentiated when and how each professional should be involved.

Despite its relative newness in Israel, spiritual care is well received by a wide variety of professionals at those sites where it has been integrated. Steps to improve collaboration should include improving multidisciplinary communication to broaden the range of situations in which spiritual caregivers and other professionals work together to provide the best possible holistic care.

Meaning-centered psychotherapy (MCP) is a structured psychotherapeutic intervention that aims to improve existential and spiritual well-being in patients with advanced cancer. To validate it, several efficacy studies with predominantly non-Hispanic white patients have been done. Puerto Ricans residing on the island are a largely overlooked segment of the US Latinx population. They have a strong national identity and are embedded in a collectivist culture which shares the Spanish language, cultural traditions, and an emphasis on familism, a cultural factor that values the role of the family in ensuring the well-being of its members.

The purpose of this study is to present a case study focused on a Puerto Rican advanced cancer patient who underwent MCP to assess the comprehension and acceptance of the MCP intervention.

We used a mixed-methods study design that included the taking of ethnographic notes, and pre- and post-test assessments of the scores the patient received on all the measures (using validated scales). The ethnographic notes were analyzed to determine the participant's comprehension and acceptance of the MCP intervention. Content analysis was performed on the ethnographic notes by three independent coders using a deductive coding approach. Pre- and post-interview assessments were conducted to explore changes in distress, spiritual well-being, and self-perceived quality of life.

A Latino patient with stage III cancer, low income, and low literacy skills showed low comprehension of the concepts of meaning, the finite, legacy, and moderate comprehension and acceptance of the concepts of the search for hope, purpose in life, connecting with life, courage, life's limitations, and sources of meaning. However, the patient showed high comprehension of death and dying (i.e., meaningful death). The patient showed low acceptance of death and dying concepts and high acceptance of the integration of family members into the therapy.

Additional studies are needed to address cultural themes and to improve the comprehensibility and acceptance of the manual's content and the central MCP concepts. The findings suggest that MCP has the potential of being a feasible form of psychotherapy for Latinx patients suffering from distress, low spiritual well-being, and low self-perceived QOL.

Nivolumab has become an effective treatment option for cancer in various sites; however, this drug may cause immune-related adverse effects due to its mechanism of action. Furthermore, little has been reported on thiamine deficiency (TD) in patients receiving nivolumab treatment.

From a series of cancer patients, we reported a patient with recurrent renal cell carcinoma who developed TD after the start of nivolumab treatment.

A 74-year-old man with recurrent renal cell carcinoma was referred to the psycho-oncology department as he had lost about 4 kg and displayed a loss of energy after four cycles of nivolumab treatment. Psychiatric interviews revealed a decrease in energy. Neurological examination did not reveal any impairment in consciousness, ataxia, or ocular symptoms. He did not develop appetite loss. The malabsorption or overconsumption of some nutrients is thought to occur due to the rapid loss of weight; thus, a reduction in vitamin B1, which has a short storage period in the body and is often deficient in cancer patients, was suspected. The diagnosis of TD was supported by the patient's abnormally low serum thiamine level.

In patients treated with nivolumab, it is necessary to pay careful attention to TD when proceeding with the treatment. It is hoped that future research may reveal the link between nivolumab administration and TD.