Collision tumor of basal cell carcinoma and nevus: Dermoscopic and confocal features

Introduction: A collision tumor is two or more independent neoplasms superimposed on one another. As a result of their overlapping clinical and dermoscopic features they may be diagnostically challenging. Reflectance confocal microscopy (RCM) allows for evaluation of the skin lesions in vivo and better planning concerning their management.

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