Ovarian and juxtaovarian adenomatoid tumors: a report of six cases.

Five ovarian adenomatoid tumors and one juxtaovarian tumor of this type in women 23 to 79 (average 54) years of age are described. Four were less than or equal to 7 mm in diameter; the other two were 1.4 cm and 5 cm. The five ovarian tumors were located predominantly in the hilus, with focal extension into the medulla. Microscopic examination showed the lesions to be characterized by round, oval, or elongated tubules, some of which were cystically dilated, and vacuoles occasionally containing basophilic secretion. Hyaline bodies were present in one case. Follow-up in these cases and the 10 previously reported similar cases that include follow-up information has been benign. The microscopic features of the ovarian adenomatoid tumor are typically diagnostic, but, as illustrated by one of our cases and another in the literature, some features that simulate those of yolk sac tumor may cause diagnostic difficulty when the tumor occurs in a young patient.