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A 45-year-old woman came to the outpatient clinic for counseling because of concern about a family history of colonic polyps and cancer.
The patient felt well and had had no abdominal pain, change in bowel habits, rectal bleeding, or weight loss. She had had no operations and took no medications. A colonoscopic examination had been performed for screening purposes four years earlier, and no polyps had been identified. She did not smoke and rarely consumed alcohol.
The patient's mother was 80 years old and had been given a diagnosis of colon cancer at 75 years of age. The patient's father
Pathological Discussion
Differential Diagnosis
Familial Adenomatous Polyposis and Attenuated Familial Adenomatous Polyposis
Genetic Basis of Familial Adenomatous Polyposis
Hereditary Nonpolyposis Colorectal Cancer
Colonic Adenomas and Germ-Line Mutations in MYH
Summary and Diagnosis
Dr. Daniel C. Chung's Diagnosis
Discussion of Management
Chemopreventive Agents
Genetic Testing in Classic or Attenuated Familial Adenomatous Polyposis
Genetic Testing and Results
Final Diagnosis
Source Information
From the Gastrointestinal Unit, Department of Medicine (D.C.C.), the Department of Pathology (M.M.), and the Center for Cancer Risk Analysis (D.C.C., K.M.S.), Massachusetts General Hospital; and the Departments of Medicine (D.C.C.) and Pathology (M.M.), Harvard Medical School.
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