A split-thickness skin graft (STSG) harvested from the thigh contains which layers of skin?
- A Epidermis only
- B Epidermis and part of the dermis ✓
- C Full epidermis and full dermis
- D Epidermis, full dermis, and subcutaneous fat
Correct answer: B. Epidermis and part of the dermis
Explanation
Split-thickness skin grafts (STSG) contain the full epidermis and a variable portion of the dermis (superficial to deep split, harvested with a dermatome at 0.008–0.012 inches). Because dermis is only partially harvested, the donor site heals by re-epithelialization from the remaining dermal adnexae (hair follicles, sweat glands). Full-thickness skin grafts (FTSG) include full epidermis and full dermis; the donor site requires primary closure. STSGs contract more but take more easily; FTSGs contract less and provide better cosmesis.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.