Presentation
History of right-sided back/groin pain. Hemophiliac.
Patient Data
Age: 45 years
Gender: Male
From the case:
Iliopsoas hematoma
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Axial T2

A large heterogeneous signal intramuscular non-enhancing hematoma measuring about 70 x 110 x 150 mm along the course of the right-sided iliopsoas muscle is seen.
Case Discussion
Right iliopsoas non-enhancing hemorrhagic mass lesion consistent with iliopsoas hematoma (hemophilic pseudotumor), in the clinical setting of hemophilia.
The two main differential diagnoses of iliopsoas hematoma (hemophilic pseudotumor) are iliopsoas abscess and iliopsoas tumors such as sarcoma.