Introduction: Meigs syndrome and pseudo- Meigs syndrome both presents with hydrothorax and ascites. Meigs syndrome is characteristically associated with ovarian fibroma whereas pseudo-Meigs syndrome is associated with any ovarian or pelvic tumors, other than ovarian fibroma. Case Report: A 48-year-old perimenopausal woman presented with a long history of 8-10 years of abdominal distension. Her examination revealed a right pleural effusion, massive ascites and large heterogeneous pelvic tumor, measuring 42x31 cm. After a preoperative ascitic tapping, the patient underwent an exploratory laparotomy with excision of the tumor, uterus and the right ovary. The tumor was diagnosed histologically as an ovarian mucinous cystadenoma. The postoperative resolution of hydrothorax and ascites confirmed the diagnosis of pseudo- Meigs syndrome. The patient remains in good condition 12 months after surgery. Conclusion: Pseudo-Meigs syndrome being a rare syndrome, with a good prognosis should be included in differential diagnosis in women presenting with unexplained hydrothorax and ascites.