title: Risk of colorectal cancer in patients with hematologic disease.
abstract: OBJECTIVE
  A relatively large number of patients with multiple myeloma have been reported to develop a secondary malignancy such as cancer of the breast, biliary system or bowel.
  
  
  METHODS
  A retrospective study was perfomed in 734 patients with hematologic disease diagnosed at Nippon Medical School Hospital between May 1984 and September 1994 to determine the incidence of colorectal cancer in these patients based on a history review, colonoscopic findings, and surgical or autopsy data.
  
  
  RESULTS
  Of the 734 patients, 14 (1.9%) had colorectal cancer; two of 11 patients (18.2%) had pure red cell aplasia; two of 25 patients (8%) had multiple myeloma; and three of 46 patients (6.5%) had aplastic anemia. Patients with pure red cell aplasia, multiple myeloma or aplastic anemia had colorectal cancer at a significantly higher rate compared to those with leukemia (P< 0.005, P< 0.02, P< 0.01, respectively).
  
  
  CONCLUSIONS
  It is possible that a relatively large number of patients with pure red cell aplasia, multiple myeloma or aplastic anemia will develop a colorectal cancer.
authors: Third Department of Internal Medicine, Nippon Medical School, Tokyo, Japan.
authors: T
authors: T
authors: Kishida
authors: M
authors: M
authors: Yonezawa
authors: Y
authors: Y
authors: Shibata
authors: S
authors: S
authors: Tanaka
authors: I
authors: I
authors: Shinozawa
authors: T
authors: T
authors: Hoshino
authors: A
authors: A
authors: Tatsuguchi
authors: L
authors: L
authors: Feng
authors: J
authors: J
authors: Sato
authors: S
authors: S
authors: Fujimori
authors: Y
authors: Y
authors: Yoshida
authors: C
authors: C
authors: Sakamoto
authors: M
authors: M
authors: Kobayashi
mesh_terms: D000368:Aged; D015179:Colorectal Neoplasms / Q000150:complications* / Q000453:epidemiology*; D005260:Female; D006402:Hematologic Diseases / Q000150:complications*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors