BRCA2 and breast carcinoma: The majority of previous studies have been performed in the population of Bogotá, but Hernández et al., developed an investigation involving nearly 244 patients with breast cancer from Medellín, where only three mutations, two in BRCA1 -one with family history and one sporadic- and one in BRCA2, a sporadic case, were found in 1.2% of the patients.