Non-diabetic necrobiosis lipoidica. Hitherto unrecognized papulonecrotic, nodulo-ulcerative and familial forms of the disease.

Necrobiosis lipoidica of the legs, in which deep ulcers resembling erythema induratum, gummas or a variety of other chronic progressive ulcerating skin diseases occur, is described. In 2 cases the lesions were precipitated by a crush injury elsewhere in the same leg, but not at the site of the ultimate lesions. In 2 further pairs of siblings the same problem arose as a familial complaint without trauma. These cases were distinguished by severe necrosis in the absence of diabetes.