Abnormal echogenicity of the testicle caused by epididymal cysts.

Ultrasonography of the scrotum has proven to be highly accurate for the diagnosis of testicular and other scrotal abnormalities, particularly for defining focal lesions. False-positive examinations are unusual. Three cases are presented where large epididymal cysts compressed the testes and the remainder of the epididymis. This led to an abnormal echogenic area in testes of two patients and a hypoechoic defect of the testis suggesting malignancy in the thirds. The patients were sonographically and anatomically normal without testicular abnormality during and after operation, following removal of the epididymal fluid collections.