The Sonographic Appearance of Polyorchidism: A Multiple Case Report

The traditional sonographic characteristic used to distinguish polyorchidism (PO) has been its homogeneous echotexture, which is similar or identical to the normal testicle. PO is most commonly found in the left hemi-scrotum but can also be identified in the right hemi-scrotum, inguinal canal, or abdominal cavity. The mediastinum of a testicle represents where the tunica vaginalis and tunica albuginea that encases a testicle folded back in on itself. The identification of a mediastinum in a scrotal lesion implies that testicular tissue is present. This series review presents three cases where PO was identified in the left hemi-scrotum. In addition to the classic homogeneous echotexture that is typically identified in an accessory testicle, a mediastinum was also appreciated in two of the cases, which helped to solidify the diagnosis of polyorchidism.