[A case of purpura, or the return to natural diseases].

With reference to a case of vitamin C deficiency in a strict vegetarian, the authors recall the clinical findings and current diagnostic procedures in scurvy. Serum and urine ascorbic acid assays are now available and established the diagnosis. Management rests upon vitamin C given in a curative dosage of 1 to 2 g per day for 15 days followed by a preventive dosage of 10 mg per day.