Intramuscular Hemangioma Mimicking an Adnexal Malignancy

Intramuscular hemangiomas were defined as vascular malformations according to the International Society for the Study of Vascular Anomalies (ISSVA) classification. Aggressive appearance on radiologic images but nonaggressive course of these lesions results in diagnostic challenge for the clinicians that are unfamiliar with these lesions. Here, we present a 49-year-old woman as a rare case of mixed type intramuscular hemangioma originating from pelvic floor muscles, mimicking a malignant adnexal mass.