What causes a chalazion?

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Prepare for Differential Diagnosis and Management of Common Acute Eye and Musculoskeletal Conditions. Explore flashcards, multiple-choice questions, and detailed explanations. Ensure you are fully ready for your exam!

Multiple Choice

What causes a chalazion?

Explanation:
A chalazion is caused by blockage of the outflow of a meibomian gland due to inspissated (thickened) lipid secretions. When the duct becomes obstructed, the gland’s secretions accumulate and provoke a sterile granulomatous inflammatory response in the gland wall, creating a firm, painless nodule within the eyelid. This mechanism explains why chalazia are typically non-tender and chronic, contrasting with acute, painful infections of eyelid glands (styes) and with other eye surface or tear drainage issues that involve different tissues and symptoms.

A chalazion is caused by blockage of the outflow of a meibomian gland due to inspissated (thickened) lipid secretions. When the duct becomes obstructed, the gland’s secretions accumulate and provoke a sterile granulomatous inflammatory response in the gland wall, creating a firm, painless nodule within the eyelid. This mechanism explains why chalazia are typically non-tender and chronic, contrasting with acute, painful infections of eyelid glands (styes) and with other eye surface or tear drainage issues that involve different tissues and symptoms.

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