Gastroenterology · UKMLA & AKT
Anal fissure
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- An anal fissure is a linear tear in the squamous mucosal lining of the anal canal, almost always at the posterior midline. A vicious cycle of pain → IAS spasm → raised anal pressure → ischaemia → impaired healing underlies chronicity.
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