New Applications of the Anterior Intercostal Artery Perforator Flap for Prosthetic Breast Reconstruction in the Setting of Postoperative Radiotherapy.

Background: Several studies have reported preliminary experiences with the anterior intercostal artery perforator (AICAP) flap for treating partial breast defects or breast implant exposure following reconstruction. As radiotherapy is commonly administered for breast cancer, some patients may present with heavily damaged skin flaps and chronic radiodermatitis. We describe new applications of a de-epithelialized AICAP flap, used in combination with an implant, for breast reconstruction when other treatment options are unavailable. Methods: A retrospective study was conducted, including all patients who underwent implant-based breast reconstruction with the aid of an AICAP flap. A literature review was also performed. Results: Between November 2022 and August 2023, four pedicled AICAP flaps were harvested in four patients. The indications were breast implant coverage in cases of chronic dermatitis of the mastectomy skin flaps (two unilateral flaps) and inferolateral coverage of partially submuscular expanders for immediate breast reconstruction (two unilateral flaps). All four flaps were based on one perforator. The mean harvesting time was 40 minutes. Complete flap survival was achieved, with no complications at the donor site. Conclusions: The AICAP flap is a safe and reliable technique for difficult cases of breast reconstruction when no other options are available. Moreover, this technique can easily provide additional coverage for the breast implant when needed.