Histological reporting in patient management: frequently asked questions.

The recognition of a melanocytic tumor as a melanoma is not based upon the search of single, objective and easily reproducible morphological diagnostic features but, instead, it stems from a constellation of diagnostic criteria whose implementation, meaning and relative weight vary considerably from one case to another. We have herein tried to summarize the most reliable criteria. In conclusion, the pathologist should provide the surgeon with a report containing sufficient information to allow an evidence-based patient management planning, and to permit an accurate indication of prognosis to be determined.