In situations where a malignant neoplasm is suspected, in front of a benign or inconclusive diagnostic in FNAB, a biopsy should be performed, since it is a gold standard for the final and definitive diagnosis of lesions in general. The experience of the pathologist to see slides of FNAB is essential for its diagnosis to be the most accurate, as well as familiarity with a particular technique of staining, helping thus considerably in the final diagnosis of the material collected by FNAB