Müllerian adenosarcoma is a rare neoplasm and has different clinical behavior according to localization and grade of stromal component. Generally, the tumor can be expected to recur or metastasize. Patients with adenosarcoma can have long-standing endometriosis, but direct relation with this tumor and endometriosis is not clear on the literature. Two premenopausal women with abdominal pain and pelvic mass underwent radical operation and were reported as primary extrauterine adenosarcoma. In this report, we emphasized the importance of histological features of these tumors. [Turk J Cancer 2008;38(1):26 -29]