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A 64-year-old woman was admitted to our hospital for a closer examination of occult blood in the stool. She appeared to be healthy, but physical examination revealed a soft elastic mass in her right lower abdomen. Laboratory examinations showed no abnormality of blood chemistry and that red and white blood cell counts were within the normal ranges. Abdominal X-ray revealed numerous round radiolucencies in the right side of the colon (figure 1), which were shown as honeycomb-like lesions by computed tomography. Total colonoscopy showed multiple submucosal cysts containing gas in the ascending and transverse colons (figure 2). She was therefore diagnosed as having pnematosis cystoides intestinalis.
We should bear in mind that pnematosis cystoides intestinalis can be easily diagnosed by the characteristic numerous round radiolucencies on abdominal X-ray, which can eliminate unnecessary invasive and expensive further examinations.