A rare association of arteriovenous malformation of the omentum and pseudo-Meigs' syndrome: case report and scoping review of literature.

Meigs' syndrome is defined as a secondary triad of ascites, pleural effusion and benign ovarian tumor, usually fibroma. While pseudo-Meigs' syndrome is a rare condition that is associated with benign ovarian tumor-other than fibroma-or even malignant. The case presented is a 40-year-old Saudi, nulliparous woman who was referred for precise diagnostic work-up as a case of huge pelvic-abdominal mass, tense ascites and pleural effusion. After further investigations cancer antigen-125 was found to be elevated. An abdominal CT scan revealed significant interval increase in the size of ascites, which cause huge abdominal distention, as well as a significant pleural effusion. Pathology of surgical specimens revealed a giant uterine leiomyoma, whereas the omentum excision surprisingly confirmed multiple disorganized arteries and veins, which resulted in omental arteriovenous malformation. To the best of our knowledge, this is the first reported case in the worldwide literature of two different rare conditions.