“…Several case reports have been published regarding patients who required aggressive treatment, including blood transfusion, because of late-onset massive rectal bleeding. 2 , 3 , 4 Recently, several risk factors for rectal bleeding have been suggested, such as increasing biopsy core numbers, advanced age, poorly controlled hypertension, and constipation, whereas the influence of antiplatelets remains controversial. 2 Because these risk factors would increase according to the age of patients and the expansion of prostate biopsy indications, a risk of severe rectal bleeding should be considered.…”