AJR Am J Roentgenol. 2001 Jun;176(6):1459-66. Tuberculous epididymitis and epididymo-orchitis: sonographic appearances. Muttarak M1, Peh WC, Lojanapiwat B, Chaiwun B.
Tuberculosis infection of the scrotal contents results from retrograde extension from the prostate and seminal vesicles as well as from hematogeneous spread. Infection usually affects the epididymis first, but if the initial therapy is not appropriate, testicular involvement may follow. Clinically, patients present with a painless or slightly painful scrotal mass. The differential diagnosis of such a scrotal mass includes testicular tumor, acute infection, infarction, and granulomatous infection. When clinical findings mimic those of a tumor, the diagnosis of tuberculosis infection is likely to be missed because tumors are a more common cause of scrotal mass
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