Background: An increased CA 125 in conjunction with a pelvic mass is, although, strongly indicative of ovarian cancer, there are a number of other benign diseases that may be linked to a pelvic mass and a higher CA 125.

Meigs syndrome is an uncommon condition in women under the age of 30. It consists of a triad of benign fibrous ovarian tumors, ascites, and pleural effusion. When the tumor is removed, the symptoms got resolve completely within two weeks.

Case Presentation: It is a case of a 15-year-old girl with fibroma, along with a review of the literature. Although the cause of the fluid accumulations is unknown, it seems to be linked to lymphatic blockage. Abdominal distension, pain, cough, pleuritic chest pain, vomiting, fever, and weight loss are all presenting symptoms.

Conclusion: This case report concludes that although a pelvic mass with elevated CA 125 is strongly indicative of malignancy, other illnesses, particularly Meigs syndrome and pseudo-Meigs syndrome in young women presenting with a pleural effusion, should always be evaluated as a differential diagnosis. The fluid buildup typically disappears within two weeks of the tumor being removed.