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Ultrasound diagnosis of paratesticular rhabdomyosarcoma

Departments of ¹ Diagnostic Radiology, ² Pathology and ³ Urology, Chi-Mei Foundation Medical Centre, Tainan, Taiwan, Republic of China

View larger version (109K): [in a new window]   Figure 1. Longituidinal section (composite image) of high resolution ultrasound shows a well defined hypoechoic extratesticular mass (arrows) was found in the left scrotum, hydrocele was also present.

View larger version (97K): [in a new window]   Figure 2. Colour Doppler ultrasound shows that the mass was hypervascular (arrow).

View larger version (125K): [in a new window]   Figure 3. (a) Pathologically, this tumour was a myxoid tumour, and composed of pleomorphic cells (haematoxylin & eosin stain x 400). (b) Immunohistochemical stain using desmin ( x 400) showed that these cells were postive for desmin, and showed cytoplasmic striation (arrowhead).

View larger version (95K): [in a new window]   Figure 4. Ultrasound (transverse section) shows recurrent hypoechoic tumour located cephalad to the left testicle, calcifications are seen within the recurrent tumour (arrows).