title: Large hyperpigmented perianal tumor.
abstract: Anorectal melanomas are rare tumors that occur more frequently with advancing age and peak in the sixth and seventh decades (Felz et al., 2001). Surgery is considered to be optimal therapy; however, chemotherapy and immunotherapy have been shown to be effective in a small number of patients.
authors.affiliation: Santa Clara Valley Medical Center, San Jose, CA, USA.
authors.forename: Pamela Hallquist
authors.initials: PH
authors.lastname: Viale
mesh_terms: D001005:Anus Neoplasms / Q000175:diagnosis* / Q000473:pathology* / Q000628:therapy; D001932:Brain Neoplasms / Q000556:secondary; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary; D008545:Melanoma / Q000175:diagnosis* / Q000556:secondary* / Q000628:therapy; D008875:Middle Aged; D010166:Palliative Care