Magnetic resonance imaging to avoid laparotomy in pregnancy.

Objective: To determine whether magnetic resonance imaging (MRI) in pregnancy would help define a benign pelvic mass, thereby avoiding laparotomy.

Methods: During a 2-3-year period, five pregnant women with adnexal masses suspected to be leiomyomas underwent MRI.

Results: Four patients had evidence of leiomyoma and one had a benign cystic teratoma.