Scleredema diabeticorum is characterized by a dramatic increase in the thickness of the skin of the posterior neck and upper back. Of the 17 scleredema patients diagnosed by us in the last 15 yr, 16 have had type II diabetes mellitus. In a prospective study of 484 diabetic outpatients we found the prevalence of scleredema to be 2.5%. Angina pectoris was the only complication that occurred significantly more frequently in scleredematous diabetic patients than in a control group of diabetic patients without scleredema. Scleredema diabeticorum is a distinct cutaneous condition peculiar to diabetic individuals and ought not to be confused with scleredema of Buschke or scleroderma.

Pseudo-Kaposi's sarcoma developed on the skin overlying a vascular graft in a haemodialysis patient. After spontaneous thrombosis within the graft, the cutaneous lesions promptly resolved. Light and electron microscopic study of the lesions failed to distinguish them from those of true Kaposi's sarcoma.

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Diaper dermatitis with psoriasiform ID eruption has a distinct clinical presentation. Its etiology and relationship to psoriasis remain uncertain. Previous reports have shown histologic features of subacute to chronic dermatitis. Two cases are presented in which a biopsy of secondary lesions showed features characteristic of psoriasis. It is possible that such cases represent those patients with a psoriatic diathesis.

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