Cosmetic Subunits- Major structural areas of face separated by contour lines or boundaries
- Units arranged by similarity in topographic anatomy, texture, pigmentation, amount of sun exposure, sebaceous gland, and hair type/density
- Major units: forehead, temples, eyelids, nose, cheeks, upper and lower lips, chin and ears
- Units within nose: dorsum, nasal sidewall, soft triangle, tip, alar lobule, columella
- Contour lines between cosmetic units is an ideal place to hide surgical scars (i.e., hairline, alar or nasolabial crease, eyebrows, philtrum, vermilion cutaneous interface)
- Defects should be repaired with tissue from w ithin the same cosmetic unit to preserve consistency and for best cosmetic outcome
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