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A small tumor of the eyelid formed by retention of tarsal gland secretions. Also known as a Meibomian cyst.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a chronic inflammation in the meibomian glands resulting in the formation of a solid nodule, 5–6 mm or more in size, lodged within the eyelid and deforming it. The nodule sometimes bursts open of its own accord. The condition is treated by applying an ointment of yellow mercury or potassium iodide; when large, the nodules may be removed by surgical means.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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The main reasons for referral of patients by PHC physicians in this study were those affecting the anterior segment of the eye, for example, errors of refraction, cataract, allergic conjunctivitis, chalazion, and squint.
Retrobulbar optic neuritis presents with subacute loss of vision and pain on eye movement with normal appearing optic nerves initially.11 A few cases of stye, infected chalazion, pterygium and orbital cellulitis were also reported, which present with headache as an associated symptom.
Main outcome measure was reduction in chalazion size to 2mm or smaller after steroid injection at 4 weeks follow up visit.
Kriegel, "Bloodless nasal alar surgery: another innovative use of the chalazion clamp," Dermatologic Surgery, vol.
In many cases correct diagnosis of SGC of the eyelid is delayed because of its ability to masquerade as a variety of other ocular conditions such as chalazion, chronic blepharoconjunctivitis, basal cell carcinoma or other eyelid tumors.
Decreased lipid layer production is observed in older dogs and is due to abnormal secretion of the tarsal glands affected by chalazion, a condition common in elderly animals (GRAHN & STOREY, 2004).
Lesions around the eyes may be confused with benign appendageal tumors, including chalazion. Giant molluscum--lesions >2 cm in diameter--may resemble deep fungal infections such as cryptococcosis and histoplasmosis.
A IN this age group, a lump under the eyelid is usually caused by a chalazion - a cyst in the lubricating glands of the eye.
The patient remained tumor-free until the age of 12 years, when she developed a left upper lid chalazion that was followed clinically.
Eleven of these subjects had a mechanical cause: eyelid scarring secondary to trauma, chalazion excision or recurrent blepharoconjunctival infection.
A chalazion is a chronic, sterile, lipgranulomatous inflammation of the meibomian gland within the tarsal plate (Table 1) (Figure 1).
Three patients of SGC had history of recurrent chalazion. MCC patient presented with a painless swelling over the left lower eyelid.