Disease or Syndrome
chalazion
[ kuh-ley-zee-uh n]
Subclass of:
Eyelid Diseases; Cyst
Etymology:
Greek diminutive of chalaza = hailstone
Hence a small pimple.
Definitions related to meibomian cyst:
  • (chalazion) A chronic epithelioid cell granulomatous inflammation of the meibomian gland caused by inflammation of a blocked meibomian gland. A chalazion or meibomian cyst appears as a painless tuberous swelling in the upper lid without loss of eyelashes.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • (chalazion) A non-neoplastic cyst of the MEIBOMIAN GLANDS of the eyelid.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (chalazion) An eyelid cyst caused by the blockage of a meibomian gland.
    NCI
    U.S. National Cancer Institute, 2021
  • Focal swelling of the eyelid is a common complaint in both primary care and urgent care settings. Often, such swelling is identified as either a chalazion, appearing as a characteristically hard and painless lid nodule, or a hordeolum (stye), although several other benign and malignant processes can be mistaken for these two.
    Medscape
    WebMD, 2025
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