Pityrosporum ovale/orbiculare in papillomatous nevus cell nevi.

62% of 200 papillomatous nevus cell nevi compared to 45% of 40 seborrheic keratoses showed the presence of Pityrosporum ovale/orbiculare (Malassezia furfur) on their surface, supposedly representing a saprophytic state of the microorganisms in vivo. The papillomatous nevus cell nevi were of the compound or dermal type. Significant inflammation, dysplasia or major changes in color were absent.

[Panniculitis with liquefaction--a special manifestation of Pfeiffer-Weber-Christian panniculitis].

A case of nodular panniculitis with liquefaction in a 58-year-old woman patient is reported. It seems that Pfeiffer-Weber-Christian disease and nodular panniculitis with liquefaction are varying expressions of the same disease entity. The relationship to cases reported in the literature is discussed.

[Argyria. A clinical, chemical analytic and micromorphologic study].

A 62-year-old male patient developed generalized argyria following the intake of silver-proteinacetyltannate (Targesin; approx. 60 g in 10 years) as treatment for gastric discomfort. On histological and ultrastructural examination of the skin, silver particles were found not only in the usual locations but also in the Schwann cell, the mast cell, and in smooth muscle cells.

[Erythrodermic sarcoidosis (a clinical, light and electron microscopy study)].

We report on a 50-year-old patient suffering from erythrodermic sarcoidosis accompanied by visible enlargement of the peripheric lymph nodes. Histologic examination revealed epithelioid granulomas in the skin, in a lymph node, and in a liver biopsy. Ultrastructurally, we found a focal presence of cells with Langerhans' granules sometimes in a spatial relation to lymphoid cells within the corial granulomas.