how and when to perform a skin biopsy of a pigmented lesion. What the surgeon need to knowAt present times, general surgeons are continuously faced to evaluate patients with pigmented lesions. Thus, is very important that surgeons acquire adequate knowledge not only to distinguish between suspicious lesion and non suspicious lesion, but also to correctly assess when and how to perform a skin biopsy. The early detection of melanoma and non melanoma skin cancer is one of the most important factors to achieve a better prognosis. The main objective of this article is to provide surgeons some tips and pitfalls to help accurate the evaluation and diagnosis of pigmented lesions. The authors also want to stress out the importance of the team work between surgeons and dermatologist, due that is well documented that multidisciplinary approach to skin cancer raises the possibilities of early diagnosis, adequate treatment and better results for patients with skin cancer. key words: Skin cancer, suspicious lesion, diagnosis, biopsy. resumenEn la actualidad, el cirujano continuamente se ve enfrentado a evaluar distintos tipos de lesiones cutáneas en los pacientes, por lo que debe tener conocimientos de las características que hacen que una lesión sea sospechosa o no, para evaluar correctamente cuándo y cómo realizar una biopsia de una lesión cutánea. El diagnóstico precoz, tanto del melanoma como del cáncer de piel no melanoma, ha demostrado ser clave para mejorar el pronóstico de nuestros pacientes. Este artículo pretende entregar algunas claves para afinar Rev Chil Cir. Vol 67 -nº 5, Octubre 2015; pág. 538-544