Mullerian Adenosarcoma of the Endometrium in a 19-Year-Old Girl: Case Report and a Literature Review

Mullerian adenosarcoma of the endometrium in adolescent girls is extremely rare, with only fifteen cases under 20 years old having been reported to date. We describe here a new case of adolescent Mullerian adenosarcoma and provide an updated review of the previous literature on such rare tumors. Our 19-year-old case presented with a six-month history of prolonged menstruation. She had not yet had any sexual relationship. On gross examination, a fragile mass was seen in her vagina that bled easily. A 4.0×2.0 cm mass was visualized with Magnetic Resonance Imaging (MRI). The tumor seemed to slightly invade the myometrium of the uterine corpus. Transvaginal ultrasound sonography confirmed the presence of a 4.0 cm mass located in the cervix and vagina. The tumor biopsy was diagnosed as a Mullerian adenosarcoma of the endometrium. We performed a Total Abdominal Hysterectomy (TAH) and Bilateral Salpingectomy (BS). The post-surgical specimen was diagnosed as a pT1aNXM0 Mullerian adenosarcoma of the endometrium. The patient did not require adjuvant chemotherapy. She has been monitored every 3 months and has been without recurrence now for 28 months.