Müllerian adenosarcoma is a mixed epithelial-mesenchymal neoplasm that originates from the Müllerian duct and is characterised by benign epithelial gland and malignant stromal components as active participants in the neoplastic process (1). The uterine corpus is the most common primary site but Müllerian adenosarcoma has been reported to arise in the ovary, cervix, vagina, pelvic peritoneum, pouch of Douglas, broad ligament, bladder, and colon (2-5). Although adenosarcomas are generally low-grade malignancies, adenosarcoma with sarcomatous overgrowth is a highly aggressive tumour. These tumours are frequently associated with postoperative recurrence or metastases and a fatal outcome, even in earlystage disease (6).We present a case of Müllerian adenosarcoma located in the pouch of Douglas and report the clinical and pathological findings. This is the second case reported in the literature that was treated by total excision of the tumour, and no recurrence was seen during the subsequent 24-month period.
CASE PRESENTATIONA 26-year-old, gravida 0, para 0 woman with lower abdominal distension and left lower quadrant pain was seen in our hospital. She had no significant medical or family history. Her menstruation cycles were regular and she had used no medications. According to her history, she had no sexual relationship of any kind. Physical examination revealed a large, palpable mass in both lower quadrants up to the level of the umbilicus, with associated tenderness. Laboratory studies showed a minimally elevated cancer antigen 125 (CA-125) level of 36.2 U/ mL. All other laboratory tests, including carcinogenic antigen (CA 19-9), carcinoembriogenic antigen (CEA), and alphafetoprotein (AFP) were within normal limits.Transabdominal ultrasonography revealed a diffuse, free pelvic fluid and a complex adnexal multiloculated cystic mass measuring 10x8 cm, with solid areas and internal echoes.One day later, computed tomography (CT) of the chest, abdomen, and pelvis demonstrated a 23x11 cm, solid/cystic mass arising in the left ovary with mural nodularity, which extended from the pelvis in the midline towards the umbilicus.Magnetic resonance imaging (MRI) of the abdomen and pelvis was performed 3 days later. The MRI confirmed a predominantly solid left adnexal mass, which measured 15.4x11.2x1 cm (Figure 1). Both CT scan and MRI excluded any distant metastatic spread.The patient underwent surgery with the presumed diagnosis of an ovarian malignancy. Laparotomy revealed an 18 cm cystic mass surrounded by a very thin wall in the pouch of Douglas. The mass was adherent to the sigmoid colon and the pelvic sidewall. Bilateral ovaries, the fallopian tubes, and upper abdomen appeared normal. The mass was removed