Aim: Surface mould brachytherapy (SMBT) is an effective non-invasive treatment option for patients with skin cancer and other superficial tumours. We describe the detailed technique of uniquely treated patients of various histology using customized tailor-made surface moulds and evaluated clinical outcomes, toxicity profile, and quality of life of patients treated with SMBT.
Materials and methods: In this retrospective study, we have evaluated nine patients treated with surface moulds using iridium-192-based high-dose-rate brachytherapy.
Results: The median age was 34 years. The histopathological diagnosis included squamous cell carcinoma (n=4), followed by giant cell tumour (n=2), and 1 each of angiosarcoma, dermatofibrosarcoma protuberans, and clear cell sarcoma. The most common radiotherapy dose schedule was 60-66 Gray at 2 Gray per fraction. After a median follow-up of 24 months, local control was 100%. At the end of five years, overall survival (OS) and disease-free survival (DFS) were 88.89%. The maximum acute skin and subcutaneous toxicity grade II was observed in 5 (55.6%) patients and grade III in 4 (44.4%) patients, maximum late toxicity was grade III in 3 (33.3%) patients. Poorer Dermatology Life Quality Index scores were statistically significantly associated with higher overdose index (>0) (P=.039), and V150% >40% (P=.039).
Conclusion: SMBT is an effective modality to achieve excellent local control in patients of skin and superficial tumours. After five years, OS and DFS both were 88.89%. It was well tolerated with manageable grade II,III acute and late skin toxicities.
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