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Skin brachytherapy is an effective treatment for patients with skin cancers. It is based upon the use of an applicator containing a gamma-emitting source located near the tumor. For superficial and shallow skin tumors close to sensitive structures, we propose a new brachytherapy method using 3D printing technology employing beta-emitting isotopes. The beta-emitting patches would allow for directed, effective and controlled dose delivery to the skin tumors, thus mitigating exposure to sensitive structures.