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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.
Term:Epidermoid cyst
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Accession:HP:0200040 term browser browse the term
Definition:Nontender, round and firm, but slightly compressible, intradermal or subcutaneous cyst measuring 0.5-5 cm in diameter. Epidermal cysts are intradermal or subcutaneous tumors, grow slowly and occur on the face, neck, back and scrotum. They usually appear at or around puberty, and as a rule an affected individual has one solitary or a few cysts.
Comment:A cyst is a cavity containing liquid, semisolid, or solid material. An epidermoid cyst is a benign cyst that develops out of ectodermal tissue and consists of a thin layer of squamous epithelium. An epidermal cyst may or may not be painful or release pus, and are usually noticed as a bump on the skin. Epidermal cysts and trichilemmal cysts are clinically indistinguishable. The wall of the epidermal cyst conserves the epidermal layers, but the wall of the trichilemmal cysts, which arise from the external root sheath, shows palisading of unlayered epithelial cells. Homogeneous horny material that is further degraded to fat and cholesterol forms within both types of cysts.
Synonyms:exact_synonym: Epidermal cyst;   Epidermal inclusion cyst;   Infundibular cyst;   Keratin cyst
 related_synonym: EPIDERMOID CYSTS;   Sebaceous cyst
 xref: SNOMEDCT_US:399999000;   SNOMEDCT_US:417992006;   SNOMEDCT_US:418323001;   SNOMEDCT_US:418630001;   SNOMEDCT_US:419603000;   SNOMEDCT_US:419670003;   SNOMEDCT_US:419893006;   UMLS:C0014511


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the integument 0
        Abnormality of the skin 0
          Abnormal skin morphology 0
            Localized skin lesion 0
              Cutaneous cyst 0
                Epidermoid cyst 0
                  Axillary epidermoid cyst 0
                  Cyst of the eyelid + 0
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