Sonogram of a 41-year-old man with a chronic muscle tear presenting with a pseudotumor in the right upper arm.There is no soft tissue tumor, but a mild bulging contour (arrowheads) in the upper arm. A localized hyperechoic region (arrows) is noted at the musculotendinous junction of the biceps brachii, just distal to the bulging contour of the upper arm. These findings suggest a chronic tear at the musculotendinous junction.