A cyst of the little glands in the eyelids that make a lubricant which they discharge through tiny openings in the edges of the lids. The lubricant is a fatty substance called sebum characteristic of sebaceous glands. These glands are called the meibomian glands. Inflammation of them is termed meibomianitis or, alternatively, meibomitis. Chronic inflammation of the meibomian glands leads to meibomian cysts or chalazions. The word "chalazion" is Greek for small pimple (and little hail). Like a pimple, a chalazion is an inflamed swelling. But instead of being on the skin, a chalazion is in the margin of the eyelid.
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A chronic inflammatory granuloma of a meibomian gland. SYN: chalaza (1), meibomian cyst, tarsal cyst. [G. dim. of chalaza, a sty]
- acute c. SYN: hordeolum internum.
- collar-stud c. a c. that extends through the tarsal plate anteriorly (c. externum) and toward the conjunctiva.

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cha·la·zi·on kə-'lā-zē-ən, -.än n, pl -zia -zē-ə a small circumscribed tumor of the eyelid formed by retention of secretions of the meibomian gland and sometimes accompanied by inflammation

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a swollen sebaceous gland in the eyelid, caused by chronic inflammation following blockage of the gland's duct. The gland becomes converted into a jelly-like mass, producing disfigurement of the lid. It may become secondarily infected, when it will be painful and may discharge. Treatment is by application of antibiotic ointments or surgical incision and curettage of the gland.

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cha·la·zi·on (kə-laґze-on) pl. chalaґzia, chalazions [Gr. “small lump”] an eyelid mass that results from chronic inflammation of a meibomian gland and shows a granulomatous reaction to liberated fat when subjected to histopathological examination; sometimes called meibomian or tarsal cyst.


Medical dictionary. 2011.

Look at other dictionaries:

  • Chalazion — Classification et ressources externes Chalazion de la paupière supérieure CIM 10 H00.1 …   Wikipédia en Français

  • Chalazión — en estadio inicial del párpado del ojo izquierdo. Clasificación y recursos externos CIE 10 …   Wikipedia Español

  • chalazion — [ ʃalazjɔ̃ ] n. m. • chalazium 1538; de chalaze ♦ Méd. Petite tumeur dure, indolore, au bord de la paupière. ⇒ orgelet. ● chalazion nom masculin (grec khakadzion, diminutif de khaladza) Petit kyste inflammatoire du bord de la paupière. chalazion… …   Encyclopédie Universelle

  • chalazion — m. oftalm. Aumento de tamaño de las glándulas de Meibomio del párpado, a causa de una oclusión de su conducto; su aparición suele ser posterior a la inflamación de dicha glándula. Se caracteriza por la presencia de nódulos duros no dolorosos… …   Diccionario médico

  • chalazión — (Del fr. chalaze, chalazion). m. Tumor pequeño producido por la inflamación crónica de las glándulas sebáceas de los párpados …   Diccionario de la lengua española

  • Chalazion — Cha*la zi*on, n. [NL., fr. Gr. ? dim. of ? hail, pimple.] (Med.) A small circumscribed tumor of the eyelid caused by retention of secretion, and by inflammation of the Melbomian glands. [1913 Webster] …   The Collaborative International Dictionary of English

  • chalazion — (n.) small tumor in the eyelid, 1708, from Gk. khalazion, dim. of khalaza hail, hailstone; small lump or knot; pimple, from PIE root *gheled hail …   Etymology dictionary

  • chalazion — [kə lā′zē ən] n. a chronic sty …   English World dictionary

  • Chalazion — For other uses, see Chalazion (fungus). Chalazion Classification and external resources Eyelid affected by Chalazion ICD 10 H00.1 …   Wikipedia

  • Chalazion — Klassifikation nach ICD 10 H00.1 Chalazion …   Deutsch Wikipedia

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