Diagnostic Ultrasound - Abdomen and Pelvis

Testes
TESTICULAR AND EPIDIDYMAL APPENDAGE
Anatomy: Pelvis
Testicular appendages
Epididymal head
Cystic epididymal appendix
Epididymal head
Torsed epididymal appendix
(Top) Longitudinal grayscale ultrasound of the testis in a patient with a hydrocele shows 2 small nodular protuberances from the
surface of the testis, isoechoic to normal testicular parenchyma. This is the appendix testis, which is a remnant of the müllerian system.
(Middle) Transverse grayscale ultrasound of the epididymal head in a patient with a small hydrocele shows cystic protuberance from
the surface of the epididymis. It is isoechoic to normal testicular parenchyma. This is the appendix testis, which is a remnant of the
müllerian system. (Bottom) Sagittal color Doppler ultrasound of the left epididymal head shows an exophytically arising heterogeneous
lesion without internal vascularity. The patient presented with acute scrotal pain. These findings are suggestive of a torsed epididymal
appendix.
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