Musculus compressor nuda

Case contributed by Dr Tamsir Rongpipi


Burning micturation

Patient Data

Age: 40
Gender: Male

Normal retrograde urethrogram. 

Annotated image

Arrow showing musculus compressor nuda.

Case Discussion

There is a small striated musculotendinous sling of the bulbocavernosus muscle which extends from the anterior and lateral surfaces of the proximal bulbous urethra. This structure is known as musculus compressor nuda, which may indent the proximal bulbous urethra on dynamic retrograde urethrography or, rarely on voiding uretherography.

It causes a convex symmetric cone shape formation to the proximal bulbous urethra and the cone tip is the point at which the bulbous urethra enters the urogenital diaphragm to continue as the membranous urethra.

It should not be mistaken for stricture formation.

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Case information

rID: 68324
Published: 29th May 2019
Last edited: 14th Aug 2019
System: Urogenital
Inclusion in quiz mode: Included
Institution: Apollo hospitals Guwahati