Scrotal Anatomy at MRI

  • Yuji Watanabe
Part of the Medical Radiology book series (MEDRAD)


This section of the chapter provides comprehensive description of MR features for normal anatomy, developmental growth, and related anomalies of the scrotum. The normal scrotum is divided by a midline septum called raphe, and each half of the scrotum contains a testis, the epididymis, and the scrotal portion of the spermatic cord. A normal testis has homogeneous texture of high signal intensity on fat-suppressed T2-weighted image, and covered with the tunica albuginea and the visceral layer of tunica vaginalis which are seen as a thin stripe of low signal intensity. The epididymis, which overlies the superolateral aspect of the testis, shows intermediate signal intensity lower than that of the testis on FST2-weighted image. Fibrous septa dividing seminiferous lobules are seen as low signal intensity and prominent on heavily T2-weighted image, especially in patients with infertility. Also described are other MR features found in abnormal anatomy such as cryptorchidism, inguinoscrotal hernia, hydrocele, bell clapper deformity, varicocele, etc.


High Signal Intensity Seminiferous Tubule Spermatic Cord Tunica Albuginea Fibrous Septum 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Department of RadiologyKurashiki Central HospitalKurashikiJapan

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