Cases reported "Necrobiosis Lipoidica"

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1/4. Squamous cell carcinoma arising in long-standing necrobiosis lipoidica.

    necrobiosis lipoidica (NL) is a disease of collagen. Squamous cell carcinomas developing in areas of chronic ulceration and scarring have been well documented in a variety of skin diseases but rarely in areas of necrobiosis lipoidica. The case history of a 76-year-old female is presented, whose squamous cell carcinoma appeared 30 years after the diagnosis of necrobiosis lipoidica. The clinical and histopathological picture is described, stressing the importance of the unusual association of the two pathologies in the prognostic.
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2/4. Koebner's phenomenon and necrobiosis lipoidica diabeticorum.

    In 1877, Dr Heinrich Koebner inflicted an experimental trauma on the uninvolved skin of a psoriatic patient. This resulted in the appearance of a typical psoriatic lesion at the site of trauma. This reaction, known as Koebner's phenomenon (KP), has subsequently been associated with several skin diseases. However, it has not been associated previously with necrobiosis lipoidica diabeticorum (NBL), a rare skin manifestation of diabetes mellitus. This report presents the unusual finding of NBL associated with KP in a patient with diabetes mellitus.
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3/4. 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.
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4/4. necrobiotic xanthogranuloma with paraproteinemia.

    necrobiotic xanthogranuloma (NXG) is a rare skin disease mimicking necrobiosis lipoidica diabeticorum clinically and histologically. However, its association with paraproteinemia, and the evolution of hematologic malignancies in some cases, established NXG as a separate clinicopathologic entity. A typical case with indolent course is described.
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