title: Merkel cell carcinoma--a potentially aggressive disease.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000556:secondary / Q000648:ultrastructure; D001707:Biopsy, Needle; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D012878:Skin Neoplasms / Q000473:pathology* / Q000556:secondary / Q000648:ultrastructure