Female 89 years old Reason: soft tissue swelling and tenderness History: tenderness on palpation and therapy There is a well-circumscribed collection within the flexor musculature of the right arm in the region of the distal biceps muscle. The collection measures approximately 4.5 x 3.5 x 10.0 cm. It is hypointense on T2-weighted images and isointense with hyperintense foci on T1-weighted imaging. There is surrounding interstitial edema and inflammation. Postcontrast imaging demonstrates peripheral enhancement, however, there is no internal enhancement. The adjacent bone demonstrates normal cortex and marrow signal.
Large collection in the region of the distal biceps muscle is most consistent with a bland hematoma. Superimposed or developing infection cannot entirely be excluded. Follow-up to resolution is recommended.