Testicular infarction is most commonly associated with acute testicula
r torsion. We present the sonographic findings in a case of segmental
testicular infarction associated with epididymitis. The gray-scale abn
ormalities included a round, well-defined, hypoechoic intratesticular
mass and heterogeneity and enlargement of the epididymis. Color Dopple
r sonography demonstrated only minimal blood flow in the intratesticul
ar mass and increased flow in the epididymis. Recognition of acute tes
ticular segmental infarction as a complication of epididymitis may pre
vent unnecessary orchiectomy. (C) 1998 John Wiley & Sons, Inc.