Fatal Pulmonary Veno-Occlusive Disease and Systemic Juvenile Idiopathic Arthritis: Case Report and Literature Review.

Systemic juvenile idiopathic arthritis (sJIA) is a chronic childhood inflammatory disease. SJIA accounts for approximately 5-15 per cent of all cases of JIA and has a high morbidity and mortality rate. In this disease, pulmonary complications (PC) other than pleuritis are much less frequent and not easily recognised by clinicians. Pulmonary hypertension, the most severe PC, is associated with uncontrolled disease and use of biologic therapies. We present a case of a school-age female with sJIA who died of acute cardiopulmonary instability secondary to pulmonary venous-occlusive disease demonstrated by necropsy. We describe her clinical evolution. We also undertook a narrative review of the literature about PC in sJIA to discuss the current state of the art regarding this complication. High disease activity and the use of multiple therapies include disease-modifying anti-rheumatic drugs should be a red flag for clinicians when discounting PC and pulmonary hypertension. The combination of chest X-ray, electrocardiogram and echocardiogram appear to be the best tests to achieve an early diagnosis.