Lateral crescent sign (inguinal hernia)

Last revised by Dr Daniel J Bell on 22 Dec 2017

The lateral crescent sign is a useful diagnostic sign of a direct inguinal hernia on CT scan, the hernia causing compression and lateral displacement of the inguinal canal contents (ductus deferens, testicular vessels, fat, etc.) to form a semicircle of tissue that resembles a moon crescent seen lateral to the hernia.

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