A member asked:

Can someone explain to me what causes the 'punched-out lesions' in gouty arthritis?

5 doctors weighed in across 2 answers

Uric acid: When uric acid goes into the joint and precipitates, it forms gouty tophi which can eat away at bone causing punched out lesions.

Answered 4/17/2015

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X-ray finding: Punched out lesions are an x-ray find that explains the bony destruction caused by gout and other arthritic conditions. It is the absence of normal bone in an irregular pattern around a joint/capsule interface.

Answered 10/4/2016

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