A 75-Year-Old Retired Construction Worker Comes to Your Clinic, Complaining

Multiple Choice

A 75-year-old retired construction worker comes to your clinic, complaining of bright red blood in the toilet for the last several months. He has no pain with defecation but has occasional constipation. He states he eats a healthy diet with fruits and vegetables and walks 2 miles a day. He has had a 10-pound weight loss over the last 3 months. He denies fever or night sweats. His medical history includes high blood pressure, coronary artery disease, and arthritis. He has also had an appendectomy. He smoked for 40 years, two packs a day, but quit 15 years ago. He used to drink alcohol but doesn't now. His father died in his 60s of a heart attack and his mother had breast cancer in her 70s. On examination he appears his stated age and sits comfortably on the examining table. His blood pressure is 150/85 and his pulse is 88. He is afebrile. His cardiac, lung, and abdominal examinations are normal. Visualization of the anus shows no erythema, masses, or inflammation. Digital rectal examination elicits an irregular, firm mass on the posterior side of the rectum. After you remove your finger you notice frank blood on your glove. What anal or rectal disorder is this patient most likely to have?

A) Anal fissure
B) Internal hemorrhoid
C) Prostate cancer
D) Anorectal cancer