Figure 4

(a) Case 5. Ultrasonography revealed an irregularly bordered, low echoic tumor that protruded in a convex shape from the intrinsic muscle layer of the latissimus dorsi muscle. The size was 10 × 14 mm. (b) Case 6. Ultrasonography revealed a smoothly bordered tumor with posterior echo attenuation, having heterogeneous content and 18 × 17 mm in size.