Ching-Jiunn Wu

Segmental hemorrhagic infarction of testis associated with epididymitis.

Testicular infarction is most commonly associated with acute testicular torsion. We present the sonographic findings in a case of segmental testicular infarction associated with epididymitis. The gray‐scale abnormalities included a round, well‐defined, hypoechoic intratesticular mass and heterogeneity and enlargement of the epididymis. Color Doppler sonography demonstrated only minimal blood flow in the intratesticular mass and increased flow in the epididymis. Recognition of acute testicular segmental infarction as a complication of epididymitis may prevent unnecessary orchiectomy.

Color and duplex Doppler sonography of hemangiopericytoma

We report the color Doppler sonographic features in a case of hemangiopericytoma of the thigh in a 52‐year‐old woman. Color Doppler sonography demonstrated the vascularity of the tumor, and spectral analysis showed waveform changes that suggested the presence of intratumoral arteriovenous shunting. The color Doppler findings correlated well with angiographic findings. Color Doppler sonography can demonstrate intratumoral arteriovenous shunting in hemangiopericytoma and may be used to help avoid profuse bleeding when performing a preoperative biopsy.

Extratesticular epidermoid cyst mimicking enlarged testis

Epidermoid cysts are benign simple epithelial tumors usually appearing as hypoechoic lesions with scattered echogenic reflectors on sonography. Herein, we present a 53-year-old man with an extratesticular epidermoid cyst in the right scrotum which shows confusing sonographic findings, normal-appearing echogenicity of the lesion and atrophied testis, which lead to a diagnostic dilemma. With a variety of sonographic presentations in extratesticular epidermoid cysts, magnetic resonance (MR) imaging could play a complementary role in difficult cases.