Diffuse dermatitis: An unexpected initial presentation of cystic fibrosis.

Cystic fibrosis is an autosomal recessive disease that typically presents with pulmonary symptoms. Diffuse rash related to protein energy malnutrition can rarely be a presenting sign of cystic fibrosis in infancy. We report such a case and relate the difficulties of establishing a diagnosis. We also discuss possible pathophysiological mechanisms, histopathology, prognosis, and treatment.