Philtrum, Short

Definition:

Objective: Distance between nasal base and midline upper lip vermilion border more than 2 SD below the mean

Subjective: Apparently decreased distance between nasal base and midline upper lip vermilion border

Comments:

Usually the nasal columella inserts at the base of the nose. A Low insertion of the columella leads to shortening of the philtrum, but these should be coded separately. Using the insertion of the columella as the upper limit of the philtrum would then lead to a false shortening. An Everted upper lip often leads to the subjective appearance of a short philtrum but these should be coded separately.

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