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(a) A non-hair bearing 10 cm × 6 cm scar over the occipital region. (b) Occipital scar size was 60 sq cm. The base size of the expander was 7.8 × 5.9 cm. Additional tissue requirement was estimated as 40%. The volume of a rectangular tissue expander required to cover the defect was 172 cc and height is 3.74 cm. A 240 cc expander was used. (c) Postoperative result after removal of the expander and resurfacing of the scar with hair bearing expanded scalp
