Endometriosis of the lung.

A case is described of endometriosis of the lung in a symptomless 54-year-old woman. This and the 11 previously recorded cases of histologically examined pulmonary endometriosis have been divided into two groups. Six of these women had died during pregnancy or shortly after delivery, and their lungs contained deposits of decidua but no endometrial glands; the remaining six patients, at least five of whom had had previous pregnancies, had surgically resected lung specimens showing larger single lesions with endometrial glands. The possible relationship between these two groups is discussed.