The purpose of this study is to prospectively compare and analyze the incidence of complications in patients undergoing postmastectomy radiation therapy after breast reconstruction with subpectoral and prepectoral placement of implant. Investigators hypothesized that immediate acellular dermal matrix-assisted implant-based breast reconstruction with prepectoral implant placement would result in lower risk of capsular contracture after postmastectomy radiation therapy(PMRT) compared with acellular dermal matrix(ADM)-assisted implant-based breast reconstruction with subpectoral implant placement.
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Rate of capsular contracture (grade 3 or higher) (%) by Baker's scale
Timeframe: 6 months after the completion of PMRT
Rate of capsular contracture (grade 3 or higher) (%) by 2D shear elastography
Timeframe: 6 months after the completion of PMRT