Douek M, Wickramasinghe M, Clifton M A
Lancet. 1999 Jul 31;354(9176):393. doi: 10.1016/s0140-6736(99)02296-5.
Rectal bleeding is associated with colorectal cancer, but does not occur in all cases and is usually a symptom of minor colorectal disorders. Colorectal cancer presents only Infrequently with rectal bleeding in isolation.
直肠出血与结直肠癌有关，但并非在所有病例中都会出现，且通常是轻微结直肠疾病的症状。结直肠癌仅偶尔单独以直肠出血为表现。
