chalazion

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chalazion

 [kah-la´ze-on] (pl. chala´zia, chalazions) (Gr.)
a small eyelid mass resulting from chronic inflammation of a meibomian gland; it can sometimes be treated at home with the application of hot compresses, but while this method is usually successful with a sty, a similar infection that has not yet formed a cyst, chalazion often requires incision and drainage. Called also meibomian cyst.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cha·la·zi·on

, pl.

cha·la·zi·a

(ka-lā'zē-on, -zē-ă), Avoid the mispronunciation sha-lā'zē-ŏn.
A chronic inflammatory granuloma of a meibomian gland.
Synonym(s): chalaza (1) , meibomian cyst, tarsal cyst
[G. dim. of chalaza, a sty]
Farlex Partner Medical Dictionary © Farlex 2012

chalazion

(kə-lā′zē-ən, -ŏn′)
n. pl. chala·zia (-zē-ə)
A cyst of a tarsal gland.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

chalazion

Meibomian cyst, meibomian gland lipogranuloma, tarsal cyst Opthalmology A cyst in the eyelid caused by plugging of the meibomian gland Management Warm wet compresses; surgical drainage if unresponsive to conservative measures
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

cha·la·zi·on

, gen. and pl. chalazia (kă-lā'zē-on, -zē-ă)
A chronic inflammatory granuloma of a meibomian gland; sometimes related to blockage.
Synonym(s): meibomian cyst, tarsal cyst.
[G. dim. of chalaza, a sty]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

chalazion

A hard, pea-like swelling in an eyelid, often becoming inflamed, and due to the retention of secretion in a MEIBOMIAN GLAND. Also known as a meibomian cyst.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Meibom,

Hendrik (Heinrich), Dutch anatomist and physician ,1638-1700.
meibomian conjunctivitis - obsolete term for a conjunctivitis associated with chronic inflammation of the meibomian glands, with swollen tarsal plates and frothy seborrheic secretion. Synonym(s): seborrheic blepharoconjunctivitis
meibomian cyst - a chronic inflammatory granuloma of a meibomian gland. Synonym(s): chalazion
meibomian glands - sebaceous glands embedded in the tarsal plate of each eyelid, discharging at the edge of the lid near the posterior border. Synonym(s): tarsal glands
meibomian sty - an acute purulent infection of a meibomian (tarsal) gland. Synonym(s): hordeolum internum
Medical Eponyms © Farlex 2012

chalazion 

A chronic inflammatory lipogranuloma due to retention of the secretion (such as blocked ducts) of a meibomian gland in the tarsus of an eyelid. It is characterized by a gradual painless swelling of the gland without marked inflammatory signs and sometimes astigmatism which is induced by the cyst pressing on the cornea (Fig. C5). Small chalazia may disappear spontaneously but large ones usually have to be incised and curetted (i.e. removal of the pus with a scraper) through a tarsal incision. Resolution may also occur after local injection of a corticosteroid drug (e.g. dexamethasone or triamcinolone). Syn. meibomian cyst (although it is not a true cyst because its walls are made of granulomatous tissue and not lined with epithelium). See internal hordeolum.
Fig. C5 Upper eyelid chalazionenlarge picture
Fig. C5 Upper eyelid chalazion
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann