Borderline mucinous ovarian tumor presenting as pseudo‐Meigs' syndrome

Borderline ovarian tumor with the initial presentation of pseudo‐Meigs' syndrome is rare. A 52‐year‐old postmenopausal woman presented with a large ovarian tumor, ascites, and right hydrothorax. We found elevated serum carcinoembryonic antigens (44.4 ng/mL), carbohydrate antigen (CA)‐125 (269.8 U/mL), and CA‐199 (7942 U/mL). The frozen section pathology revealed a mucinous borderline ovarian tumor, and a staging operation was performed. Final pathologic examination confirmed the diagnosis of intestinal type ovarian mucinous borderline tumor with non‐invasive cul‐de‐sac implants. Her pleural effusion and ascites resolved after surgery, and she remained tumor‐free after 3 years' follow up. Physicians should be cautious for the rare possibility of pseudo‐Meigs' syndrome in patients with pelvic tumors having the features of advanced ovarian cancer.