Abstract
Endometriosis, usually considered to lie within the field of the gynecologist, presents a problem for the general surgeon when the site of the disease is the umbilicus. The recent increase in the number of reported cases seems to indicate a much better understanding of the condition. I wish to report 1 case and to present short summaries of the pathogenesis, pathologic picture, diagnosis and treatment of this condition. Ninety-six cases from the literature are reported chronologically. A complete bibliography is appended. PATHOGENESIS The varied names applied to the diseases grouped by Sampson and de Josselin de Jong under the title of "endometriosis" point to the indefinite origin of these tumors. Von Recklinghausen, on the basis of their morphologic resemblance to mesonephros, described them as arising from wolffian remnants. Others, notably Cullen, stated that they take origin from müllerian rests. Lauche concluded that they arise by metaplasia from peritoneal surfaces (seroepithelial).

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