Where does a chalazion most commonly occur?

Where does a chalazion most commonly occur?

• A. Lower eyelid
• B. Upper eyelid
• C. Naso-lacrimal region
• D. Lateral canthus

Answer: (B)

A chalazion is a chronic lipogranulomatous inflammatory reaction to blockage of a Meibomian gland. Because the upper eyelid contains more Meibomian glands and their secretions contribute more to the tear film, obstructed glands are more likely to form nodules there. The lesion appears as a painless, firm, nonred swelling along the tarsal plate, most often in the upper eyelid and typically in the central region. This distinguishes it from an acute, tender stye, which is an infection of the glandular openings. While a chalazion can occur in the lower lid, it is far more common in the upper lid.

A chalazion is a chronic lipogranulomatous inflammatory reaction to blockage of a Meibomian gland. Because the upper eyelid contains more Meibomian glands and their secretions contribute more to the tear film, obstructed glands are more likely to form nodules there. The lesion appears as a painless, firm, nonred swelling along the tarsal plate, most often in the upper eyelid and typically in the central region. This distinguishes it from an acute, tender stye, which is an infection of the glandular openings. While a chalazion can occur in the lower lid, it is far more common in the upper lid.