Peritoneal inclusion cyst: effects on fertility and antepartum course

BACKGROUND: Hormone changes are thought to influence the etiology and disease process of peritoneal inclusion cysts. The effects of fertility and pregnancy on preexisting cysts are unknown. CASE: A 29-year-old woman with recurrent peritoneal inclusion cyst and primary infertility conceived spontaneously after hysterosalpingogram. She presented in the first trimester with rapid, symptomatic enlargement of a 22-cm peritoneal inclusion cyst. Ultrasonogram-guided aspiration was performed. The remainder of her pregnancy and postpartum course were uncomplicated. CONCLUSION: The presence of a large peritoneal inclusion cyst does not preclude fertility. Pregnancy, a hyperestrogenic state, together with rising human chorionic gonadotropin is a risk for recurrence or enlargement of a preexisting peritoneal inclusion cyst. After conservative management with cystocentesis, there was no further enlargement as pregnancy progressed.