“Pelle (C44) Carcinoma a Cellule Di Merkel Linfonodale in Assenza Di Lesioni Cutanee Evidenti: Report Di Tre Casi E Revisione Della Letteratura Lymph Node Merkel Cell Carcinoma With No Evidence of Cutaneous Tumor: Report of Three Cases and Review of the Literature”. 2011. European Journal of Oncology and Environmental Health 16 (2): 111-16. https://mattioli1885journals.com/index.php/EJOEH/article/view/2304.