A chalazion most commonly appears on which eyelid?

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Multiple Choice

A chalazion most commonly appears on which eyelid?

Explanation:
Chalazion is a blockage of a meibomian gland within the tarsal plate of the eyelid, leading to a sterile granulomatous inflammation and a painless, nodular lump. The upper eyelid has a higher density of meibomian glands, so obstructions—and thus chalazia—occur most often there. The lesion develops in the eyelid tissue itself, not at the lid margin or corners, which is why it’s not typically described at the center of the eyelid margin or near the lateral canthus. So, the most common site is the upper eyelid.

Chalazion is a blockage of a meibomian gland within the tarsal plate of the eyelid, leading to a sterile granulomatous inflammation and a painless, nodular lump. The upper eyelid has a higher density of meibomian glands, so obstructions—and thus chalazia—occur most often there. The lesion develops in the eyelid tissue itself, not at the lid margin or corners, which is why it’s not typically described at the center of the eyelid margin or near the lateral canthus. So, the most common site is the upper eyelid.

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