Dataset for the histological reporting of primary cutaneous Merkel cell carcinoma and regional lymph nodes

This document provides the dataset for the histological reporting of primary cutaneous Merkel cell carcinoma (primary cutaneous high grade neuroendocrine carcinoma) and associated regional lymph nodes. Merkel cell carcinoma can very occasionally arise in extracutaneous locations. The proven value of this dataset in that situation must currently be regarded as uncertain. It replaces the edition of the dataset published in 2014.