直肠出血的一种罕见病因。
A 28-year-old man presented with several bloody bowel movements associated with lightheadedness. The patient denied abdominal pain, nausea, or vomiting. His father had an episode of rectal bleeding in his 30s and was diagnosed with “polyps,” for which he undergoes colonoscopies at regular intervals. Unfortunately, at the time, further details regarding his father's history were unavailable.
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