Myeloma metastasis to the testis: findings on gray-scale and color Doppler ultrasonography with literature review.

Testicular metastasis of multiple myeloma is very rare and only 49 cases have been reported in the world literature. We report on a case of a 59-year-old man with a 9- month history of multiple myeloma who presented with painless swelling of the left testis. An ultrasound (US) examination was performed and the diagnosis was documented histologically. The US findings and the differential diagnosis are discussed in the light of color Doppler ultrasonography (CDUS).