Two cases and histological observations of erosive adenomatosis of the nipple are presented in detail, and the literature on the subject is reviewed. Erosive adenomatosis is a rare but clearly delineated pathology of the nipple and seems to be essentially benign. Careful clinical and histological examinations with complete investigation of the breast are required for the diagnosis. Nonmutilating curative surgery can be performed.

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The observation of a retrolumbar subcutaneous ependymoma is reported with detail; this tumor exceptionally recognized by dermatologists must be included in the differential diagnosis of lumps arising in the retrolumbar-retrosacral area. The most peculiar feature was its development within a giant bathing-trunk nevocellular nevus; such a fascinating association of two neurectodermal defects, as far as known, is presented for the first time.

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