Testicular pain: an unusual presentation of polyarteritis nodosa.

We report a case in which the initial presentation of polyarteritis nodosa was alternating bilateral orchialgia. The diagnosis was confirmed by testicular biopsy. Testicular biopsy is an uncommonly reported diagnostic procedure despite the high incidence of testicular involvement in polyarteritis nodosa. We emphasize the value of testis biopsy, particularly when biopsy of other sites does not prove the diagnosis in suspect cases.