What disorder of the anus is this patient likely to have?

Question

A 42-year-old house painter comes to your clinic, complaining of pain with defecation and profuse bleeding in the toilet after a bowel movement. He was in his usual state of health until 2 weeks ago, when he was injured in a car accident. After the accident he began taking prescription narcotics for the pain in his shoulder. Since then he has had very few bowel movements. His stool is hard and pebble-like. He states he has always been “regular” in the past, with easy bowel movements. His diet has not changed but he states that he is exercising less since the accident. His past medical history includes hypertension and he is on a low-dose diuretic. He has had no other chronic illnesses or surgeries. He has a family history of hypertension, coronary heart disease, and diabetes but no cancer. He is divorced and has three children. He smokes two packs of cigarettes per day and quit drinking more than 10 years ago. He has had no recent weight loss, weight gain, fever, or night sweats. On examination he appears muscular and healthy; he is afebrile. His blood pressure is 135/90 with a pulse of 80. His cardiac, lung, and abdominal examinations are normal. He is wearing a sling on his left arm. On observation of his anus you find a swollen bluish ovoid mass that appears to contain a blood clot. Digital rectal examination is extremely painful for the patient. No other mass is palpated within the anus or rectum.

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

Answer 1

B) External hemorrhoid

A swollen, bluish ovoid mass is most likely a thrombosed external hemorrhoid. These can cause brisk bleeding with defecation. Hemorrhoids are often caused by low-fiber diets, dehydration, lack of exercise, and anything that causes constipation leading to increased straining with defecation. Narcotics can cause severe constipation, leading to this disorder.