In this case, an ultrasound finding of a prominent right-sided varicocele prompted further scanning of the abdomen, and this, in turn, demonstrated a large retroperitoneal vascular tumor, later proven to be a sarcoma.

Right radical nephrectomy was performed.

Pathology: Attached to mid-portion of kidney there was a mass which did not infiltrate the renal parenchyma. Histology showed a pleomorphic spindle cell sarcoma with smooth muscle differentiation.

Related to this was a large varicose draining vein passing to gonadal vein and rendering it incompetent - hence the varicocele. Most right varicoceles are caused by a left-sided varicocele with a cross flow to the right side. 
Left-sided varicoceles are mostly caused by an incompetent gonadal vein; however, when seen for the first time on ultrasound the left kidney and left renal vein (into which the gonadal vein drains) are normally examined. Pathologies include renal masses, renal vein thrombosis, and nutcracker syndrome.