[A Case of Locally Advanced Breast Cancer Reconstructed with Rhomboid Flap after Mastectomy]

We report a case of right locally advanced breast cancer in an 84-year-old woman. Her breast cancer(pathologically invasive ductal carcinoma)was 42 mm in diameter and located at B area(lower-inner quadrant)with marked skin invasion (cT4bN0M0, Stage ⅢB). Mastectomy with about 10×10 cm skin resection plus sentinel lymph node biopsy was performed in August 2022 after neoadjuvant endocrine therapy(anastrozole). The skin defect after mastectomy was reconstructed with the rhomboid flap designed at D area(lower-outer quadrant). Her cutaneous local flap after the operation showed an excellent condition and she was discharged with no wound complications. The rhomboid flap was designed quickly and easily with no special instruments, and resulted in a good cosmetic outcome. Therefore, rhomboid flap reconstruction was a very useful method to cover the skin defect after mastectomy of locally advanced breast cancer.