Anticoagulation therapy for a rare case of pseudo-Meigs' syndrome complicated by massive ascites in the postpartum period.

Most persistent symptoms of pseudo-Meigs' syndrome (PMS) are alleviated by surgical tumor removal. The present case report suggests that PMS may present with ascites and hypercoagulation and that emergency anticoagulation can improve the patient's condition. We herein describe a postpartum woman with an acute presentation including abdominal pain, ascites, postpartum hemorrhage, and degeneration of a large uterine fibroid. Initial evaluation revealed unexpected massive ascites, pleural effusion, a highly elevated D-dimer level, and a moderately elevated CA125 level. Following anticoagulation therapy, the ascites, abdominal pain, and pleural effusion resolved. There was no recurrence of these symptoms during follow-up, although the large degenerating uterine fibroid and mildly elevated serum CA125 level persisted. Postoperatively, pathological analysis confirmed leiomyoma, the patient's CA125 level returned to normal, and the ascites resolved, meeting the diagnostic criteria for PMS. Further studies are needed to determine whether a hypercoagulable state is common in pregnant patients with PMS and to develop strategies to improve outcomes.