title: Lymph nodal Merkel cell carcinoma: primary tumor or metastasis from unknown primary site?
authors.forename: Immacolata
authors.initials: I
authors.lastname: Cozzolino
authors.forename: Rosario
authors.initials: R
authors.lastname: Zeppa
authors.forename: Pio
authors.initials: P
authors.lastname: Zeppa
mesh_terms: D000368:Aged; D015266:Carcinoma, Merkel Cell / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008297:Male; D009382:Neoplasms, Unknown Primary / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery