Outcome of the use of acellular-dermal matrix to assist implant-based breast reconstruction in a single centre.

INTRODUCTION: The use of acellular dermal matrix (ADM) has transformed the technique of implant-based breast reconstruction. It offers the option of a one-stage procedure and is felt to have benefits in cosmetic outcome but the medium and long-term outcomes are unknown. METHODS: All cases where ADM was used in a breast reconstructive procedure in the Edinburgh Breast Unit from its initial use on 7/7/2008 to 31/7/2012 were reviewed retrospectively. Follow up was completed to 30/11/2012. RESULTS: 147 patients received 232 sheets of ADM (156 Strattice, 73 Permacol and 3 Alloderm). Mean follow up was 687 days. In 40 cases unplanned implant explantation occurred (17.2% or 27.2% of patients). 7 of 27 (25.9%) patients requiring adjuvant therapy had this delayed due to problems with the reconstruction. 30 of 80 patients (37.5%) undergoing unilateral surgery have undergone contralateral surgery. Implant loss varied significantly with smoking (34.6% loss rate in smokers vs 13.2% in non-smokers, p = 0.001), with radiotherapy (28.1% loss rate vs 13.8% with no radiotherapy, p = 0.001) and with incision type. There was no statistically significant variation by operating surgeon, type of ADM used, chemotherapy use, patient weight, breast weight or nipple preservation. Patients underwent a mean of 1.54 further operations (range 0-7). CONCLUSIONS: While offering potential cosmetic and financial benefits, the use of ADM with implant-based reconstructions has a significant rate of implant loss, further surgery and potential delay in adjuvant therapy. These must be considered when planning treatment and consenting patients.

Safe margins in the excision of primary cutaneous melanoma.

A group of 434 patients treated for primary cutaneous melanoma over an 18-year period by a policy of selective excision margins based on clinical estimation of tumour thickness was studied prospectively. Clinical assessments of tumour as impalpable, palpable but not overtly nodular, and nodular correspond to thicknesses of < or = 0.75, 0.76-1.49 and > or = 1.50 mm respectively. From 1971 to 1987, 330 patients were treated with excision margins of 1, 2 and 3-5 cm based on these respective ranges. During 1988 and 1989, 104 patients were treated after reduction of the maximum width of excision to 2 cm. The overall local recurrence rate was 11 of 434 patients (2.5 per cent), with no recurrence in melanoma < or = 0.75 mm thick and no increase in the local recurrence rate after reduction of the maximum margin from 3 to 2 cm. A policy of 2-cm clearance for palpable and nodular melanoma and 1 cm for impalpable lesions is recommended. Any further reduction must be tested prospectively.