History (HX): A 70 year old man with anemia and right trunk palpable mass, lower extremity DVT

Findings: Thick fluid in posterior pararenal space, heterogeneous enlargement of right psoas muscle.

Diagnostic (DX): Anticoagulant related hematoma.

Discussion: Spontaneous bleeding is a serious complication that should be promptly recognized and treated. CT, a simple and safe imaging modality, plays an important role in the accurate determination of the presence or absence of an anticoagulant- related bleed , its extent, and its precise location.