CHD may, at times, occur in the framework of other rare pathologies. These, having similar clinical manifestations, present a diagnostic dilemma for the clinician.
The authors present the case of an infant with non-syndromic complete atrioventricular septal defect, whose post-operative period was surprisingly complicated by progressive pulmonary hypertension. Despite intensive care, the infant ultimately died. The diagnosis of unilateral primary pulmonary lymphangiectasia was only possible post mortem.
