Figure 13a. Malignant fibrous histiocytoma. (a) US images demonstrate a heterogeneous mass with mixed echogenicity. Because of its large size, the mass was difficult to separate from the testicle. At surgery the testicle proved to be separate from the mass. Marked increased flow was seen at color Doppler US. (b) Photograph of the gross specimen shows a yellow-tan, glistening, bulging tumor that arises in the spermatic cord. The adjacent testicle (arrow) appears compressed. Scale is in centimeters.