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NBME 22 Answers

nbme22/Block 2/Question#11

A 52-year-old man comes to the physician because a ...

Sensation from the anterior surface of the scrotum

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 +2  upvote downvote
submitted by meningitis(120),

Actually, I correct myself: I looked closer and the Genito femoral has an external Spermatic branch and a Lumboinguinal branch. I thought it was the Genitofemoral nerve because the genital branch passes through the deep inguinal ring, enters the inguinal canal, goes to spermatic cord and supplies the cremaster and scrotal skin.

Heres the image: https://upload.wikimedia.org/wikipedia/commons/e/e4/Gray824.png

Correct me if I am wrong please.

gh889  I think you're right, FA2019 pp444 even states that sensory to the scrotum is via the Genitofemoral nerve +1  




 +2  upvote downvote
submitted by hello(51),

The Q is describing the genitofemoral nerve, which runs on the external surface of the spermatic cord at the superficial inguinal ring

This Q is NOT referring to ilioinguinal nerve -- the ilioinguinal nerve exits THROUGH the superficial inguinal canal whereas this Q is asking about a nerve that is EXTERNAL to the superficial inguinal canal.

See http://www.groinpainclinic.co.uk/data/images/nervesaffected.jpg





 +1  upvote downvote
submitted by mattnatomy(20),

I believe they're referring to compression of branches of the Ilioinguinal Nerve (possibly the Anterior Scrotal Nerves.

Source: https://en.wikipedia.org/wiki/Anterior_scrotal_nerves

armymed88  Ilioingual covers part of the medial thigh, base of penis and anterior scrotum Posterior scrotal nerves are a branch of pudendal and cover said area Doral nerves cover the dorsum of the penis which are also from the pudendal +1  
meningitis  I thought it was the Genitofemoral nerve because the genital branch supplies the cremaster and scrotal skin, but I looked it up and: The genital branch passes through the *deep inguinal ring* and enters the inguinal canal; also, Ilioinguinal wraps around the spermatic cord just like the question stem says. +1  




 +1  upvote downvote
submitted by saifshaikh(4),

I think this picture explains it well:

http://www.groinpainclinic.co.uk/data/images/nervesaffected.jpg

hello  Adding to this... The Q is describing the GENIOFEMORAL nerve, which runs EXTERNAL TO of spermatic cord at the superficial inguinal ring This Q is NOT referring to ilioinguinal nerve, which exits THROUGH the superficial inguinal canal +  




 +1  upvote downvote
submitted by d_holles(30),

I got this one via process of elimination. Not sure how you are supposed to remember all that shit.