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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Thick lower lip vermilion
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Accession:HP:0000179 term browser browse the term
Definition:Increased thickness of the lower lip, leading to a prominent appearance of the lower lip. The height of the vermilion of the lower lip in the midline is more than 2 SD above the mean. Alternatively, an apparently increased height of the vermilion of the lower lip in the frontal view (subjective).
Comment:Normal values for the height of the vermilion are available [Farkas, 1981] but measurements are not commonly used. Most clinicians determine this feature subjectively. The lower lip is typically thicker than the upper one. The height of the vermilion of the lower lip varies among ethnic groups, and the vermilion should be compared to a population of same ethnic background. When the vermilion is thick, it is more convex and more everted than usual on profile view, but that should be assessed separately.
Synonyms:exact_synonym: Full lower lip vermilion;   Increased height of lower lip vermilion;   Increased volume of lower lip;   Increased volume of lower lip vermilion;   Plump lower lip;   Prominent lower lip;   Thick vermilion border of lower lip
 narrow_synonym: Prominent lower lip vermilion;   Thick red part of the lower lip
 related_synonym: Full lower lip;   Thick lower lip
 alt_id: HP:0000170
 xref: UMLS:C1839739;   UMLS:C2053437

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of head or neck 0
        Abnormality of the head 0
          Abnormality of the face 0
            Abnormality of the mouth 0
              Abnormal oral morphology 0
                Abnormal oral cavity morphology 0
                  Abnormal lip morphology 0
                    Thick vermilion border 0
                      Thick lower lip vermilion 0
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