title: The localization of rectosigmoidal tumors or biopsy sites by methylene blue marking.
abstract: Methylene blue marking of small tumors, biopsy sites, or any tumor in an obese patient is a simple, safe and direct method for accurate identification and resection of rectosigmoidal lesions.
mesh_terms: D001706:Biopsy; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008751:Methylene Blue; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000473:pathology*; D012811:Sigmoid Neoplasms / Q000473:pathology*
chemical_list: D008751:Methylene Blue