Introduction: Spina bifida is a rare congenital disorder due to a closure anomaly of the neural tube.

Clinical case: A 9 years-old girl presents with lumbar spina bifida aperta and cervical spina bifida occulta. Her case illustrates the importance of orthodontic xrays in the diagnosis of cervical spine malformations.

Discussion: There are two categories of spina bifida. When refered to as aperta, the disorder associates a dorsal vertebral bony gap and an involvement of the spinal cord. A skin pouch can form and include meninges alone (meningocele) or meninges with spinal cord (myelomeningocele). Spina bifida is generally located in the lumbar or sacral regions, and extends over 2-3 vertebrae. On the other hand, the involvement of the cervical spine is often of the occulta type, where the defect is covered by skin and is limited to the bone. This rare condition cannot be ignored by the clinician as the craniocervical junction anomalies induced by this malformation can be associated with C1-C2 instability, as in our case report.

Arnold-Chiari malformations are a group of congenital hindbrain and spinal cord abnormalities characterized by herniation of the contents of the posterior cranial fossa caudally through the foramen magnum into the upper cervical spine. It is important to recognize Arnold-Chiari type I malformation in the differential diagnosis of adult vertigo cases. We present a 51-year-old patient with Arnold-Chiari type I malformation that was initially diagnosed as posterior semicircular canal benign paroxysmal positional vertigo.

This is a case of a 35-year-old who had complained of noisy breathing for 15 years, and had been on treatment for ‘chronic asthma’. She presented to the Accident and Emergency department with an acute episode of difficulty with breathing, and on admission was found to have stridor and bilateral abductor vocal fold palsy. Further workup revealed a syringomyelia with an associated Chiari type 1 malformation. It is important to consider the above diagnosis in the differential of young adults with breathing difficulties. A discussion of syringomyelia, Chiai malformations and bilateral vocal fold palsy follows.

The Arnold-Chiari malformation type I is a rare congenital condition characterized by herniation of the cerebellar tonsils into the upper cervical spinal tract. Various otoneurological manifestations occur in patients with the disease, which has usually been associated with a downbeat type of nystagmus. In this paper a case with this condition is reported presenting with periodic alternating nystagmus (PAN), which is a rare type of nystagmus observed in diseases of the central nervous system of different pathologies. The patient had a complete otoneurological examination and vestibular function testing. Diagnosis was established by using magnetic resonance imaging (MRI).