The Meigs' syndrome is a rare syndrome defined as the triad of benign solid ovarian tumors, ascites, and pleural effusion, which resolve spontaneously and permanently after tumor resection.
Considering the patient's serious clinical condition and assuming that she had possible Meigs' syndrome with a huge ovarian mass and ascites, at laparotomy, there was a large amount of ascites fluid and a lobulated bulging mass on the right ovary.
The Meigs' syndrome can be easily misdiagnosed as malignant ovarian tumors because of accompanying ascites with an increased serum CA-125 level.
Furthermore, it is known that large pleural effusion in Meigs' syndrome is often associated with the chronic development of pleural effusion resulting in lung collapse.
The ovarian benign tumor with Meigs' syndrome may mimic malignancy; therefore, awareness of the possibility is an important step to lead to the correct diagnosis.