Presentation
Pain in the left groin following trivial trauma. History of hemophilia.
Patient Data
Large intramuscular hematoma in the posteromedial left hip.
There has been expansion of the previously demonstrated hematoma. Features remain appropriate for the diagnosis, especially since the patient has hemophilia and the onset of symptoms followed trauma and was acute.
The size of the lesion has decreased in size, but post-contrast there is peripheral enhancement and enhancement of edema (which is not uncommon). Contrast had not previously been given.
Complete resolution of the left hip hematoma.
Case Discussion
The series of MRI examinations demonstrate an enlarging intramuscular hematoma that regresses completely within a year. Hematomas can have extremely aggressive imaging characteristics, especially when contrast is administered. Without an appropriate history, making a confident diagnosis may not be possible.
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