Vessal K, Ronaghy H A, Zarabi M
Am J Clin Nutr. 1975 Oct;28(10):1095-8. doi: 10.1093/ajcn/28.10.1095.
The significance of pica and geophagia as a public health problem is well known. The objective radiographic diagnosis of geophagia depends on the abnormal opacification of the bowel as an immediate manifestitation of the condition. The chance of detectability of geophagia is highest in the colon and can be improved by using low penetration films, particularly for smaller amounts of ingested clay. Other radiologic changes frequently associated with the prolonged practice of geophagic are an atonic pattern of the colon, secondary radiographic changes due to iron-deficiency anemia and bone-age retardation. The occurrences of intestinal obstruction due to pica in the presence of preexisting bowel stricture is demonstrated.
异食癖和食土癖作为公共卫生问题的重要性是众所周知的。食土癖的客观影像学诊断取决于肠道异常显影，这是该病症的直接表现。食土癖在结肠中被检测到的几率最高，使用低穿透性胶片可提高检测几率，特别是对于少量摄入的黏土。与长期食土癖相关的其他放射学变化包括结肠张力缺乏型、缺铁性贫血引起的继发性放射学变化以及骨龄延迟。文中展示了在已有肠道狭窄的情况下，异食癖导致肠梗阻的病例。
