Plasmacytoma of the testis

An important first step in the workup of a patient with a palpable testicular mass is sonography, considered by some to be an extension of the physical examination. Sonographic accuracy in the determination of intratesticular versus extratesticular masses has been reported as high as 99%. This distinction is important because most intratesticular masses prove to be malignant. Benign causes of intratesticular masses include hematoma, orchitis, torsion, infarction, and abscesses. The case presented had an unusual cause of an intratesticular mass. © 2005 by the American Institute of Ultrasound in Medicine.