单发性直肠溃疡的定义:单发性直肠溃疡一词(Solitary ulcer of the rectum)描写一种非炎性、非肿瘤性的直肠粘膜改变,有着明确的组织学标准。有关的同义词还很多(表1),但迄今仍没有一个能广为接受的一致概念。由于本病变化多样,基于形态学采用的名称均不能令人满意。尽管称之为“单发溃疡”,可多数病人的溃疡不只一个。“结肠炎”一词也可造成误解,因为从病因学上看本病并不是炎症。单个溃疡 Definition of single rectal ulcer: The term solitary ulcer of the rectum describes a non-inflammatory, non-neoplastic rectal mucosal change with clear histological criteria. There are still many synonyms (Table 1), but so far there is no universally accepted consensus. Because of the diversity of the disease, none of the names based on morphology are satisfactory. Although called “single ulcer”, most patients have more than one ulcer. The term “colitis” can also be misleading because the disease is not aetiologically thought to be inflammatory. Single ulcer