Reason: Left proximal arm mass, evaluate for hematoma vs malignancy History: expanding Left upper arm mass Note is made of a 5.1 x 3.4 x 6.8 cm lobulated collection along the anterior aspect of the biceps muscle at the level of the mid diaphysis of the humerus. There is associated peripheral increased signal abnormality on T1-weighted images without definitive enhancement on postcontrast sequences. These findings appear most consistent with a hematoma, however, follow-up examination is recommended to evaluate for interval change/resolution. No additional enhancing lesions are identified. No bone marrow signal abnormality is seen. The imaged musculature of the left shoulder and humerus is normal in appearance.
6.8 cm lobulated collection along the anterior aspect of the mid diaphysis of the humerus appearing most consistent with a hematoma, particularly in a patient on anticoagulation. However, follow-up examination is recommended to evaluate for interval change and to establish resolution.