Degenerating cystic uterine fibroid mimics an ovarian cyst in a pregnant patient

Aleiomyoma or fibroid is the most common uterine neoplasm, with a prevalence of 20% to 30% in patients older than 30 years. Most patients with fibroids are asymptomatic, but they may be infertile or have uterine bleeding, pain, or a palpable mass. The sonographic appearance of a uterine fibroid is usually characterized by a homogeneous or heterogeneous hypoechoic uterine mass, but the appearance can be variable, with degenerative changes appearing as a diagnostic challenge. This report exemplifies how challenging the diagnosis could be with fibroid degeneration. This was a case of a large pedunculated cystic uterine fibroid mimicking an adnexal cyst in a pregnant patient.