Lichtenstein J E, Madewell J E, Feigin D S
Gastrointest Radiol. 1979 Jan 30;4(1):79-84. doi: 10.1007/BF01887501.
The collar button-shaped ulcer is a distinctive radiographic manifestation of inflammatory disease of the GI tract. Its hallmark is mucosal ulceration with undermining submucosal extension limited by the relatively resistant underlying muscle wall. Such a process is commonly associated with ulcerative colitis where it may be seen diffusely in advanced stages of the acute disease. Occasionally, however, it may be seen in any ulcerating inflammatory disease. In the more aggressive transmural diseases, it is likely to be a localized and transient phenomenon. The same pathophysiological mechanism gives rise to the common appearance of benign ulceration anywhere in the GI tract and, particularly, in the undermined gastric ulcer.
领扣状溃疡是胃肠道炎性疾病一种独特的影像学表现。其特征是黏膜溃疡伴黏膜下扩展，且受下方相对坚韧的肌壁限制。这样的过程常见于溃疡性结肠炎，在急性疾病的晚期可能广泛出现。然而，偶尔也可见于任何溃疡性炎性疾病。在更具侵袭性的透壁性疾病中，它可能是一种局部且短暂的现象。相同的病理生理机制导致胃肠道任何部位良性溃疡的常见表现，尤其是在侵蚀性胃溃疡中。
