title: Rare natural killer cell lymphoma found during surveillance endoscopy.
abstract: BACKGROUND
  Non-Hodgkin's lymphoma is the sixth leading cause of cancer death in the USA and comprises 2-3% of primary neoplasms. Natural killer (NK)/T cell lymphomas are subtypes of non-Hodgkin's lymphoma and are aggressive neoplastic disorders with frequent extranodal presentations. Clinically, most cases of aggressive NK cell lymphomas present in young males with massive hepatosplenic infiltration. The upper aerodigestive tract is the most common site of presentation.
  
  
  METHODS
  NK/T cell lymphomas are subtypes of non-Hodgkin's lymphoma and are aggressive.
  
  
  METHODS
  Here we describe an unusual case of non-Hodgkin's NK/ T cell lymphoma of colon and stomach found during surveillance upper endoscopy followed by a subsequent colonoscopy.
authors.affiliation: Department of Gastroenterology, Hepatology & Nutrition, Clinical Nutrition Fellow at Cleveland Clinic, 9500 Euclid Ave, A30, Cleveland, OH 44195, USA. smartmax74x@yahoo.com
authors.forename: Maqsood
authors.initials: M
authors.lastname: Khan
authors.forename: Srinadh
authors.initials: S
authors.lastname: Komanduri
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003110:Colonic Neoplasms / Q000473:pathology*; D016145:Endoscopy, Digestive System; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D054391:Lymphoma, Extranodal NK-T-Cell / Q000188:drug therapy / Q000473:pathology*; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000473:pathology*