A rare cause of protein losing enteropathy: collagenous sprue.

Collagenous sprue is a clinicopathological entity with an unknown etiology. Its clinical features include progressive malabsorption, diarrhea, weight loss, unresponsiveness to treatment, and high mortality rates. The age interval of collagenous sprue is quite broad and ranges between 2 and 85 years.

Renal involvement in childhood vasculitis.

Background/aims: Renal involvement comprises one of the major organ involvements in childhood vasculitis and has also an important role in the long term prognosis. The aim of this retrospective study was to analyze the demographic, clinical, laboratory features, and the treatment modalities of patients with vasculitis who had renal involvement.

Methods: Patients with the diagnosis of vasculitis who had been followed in two pediatric nephrology centers between 1990 and 2005 were analyzed retrospectively.