The Role of Imaging Techniques in Diagnosing Appendiceal Mass Tsutomu Ishikawa 1 1Department of Diagnostic Radiology, National Cancer Center Hospital Keyword: 画像診断 , 虫垂癌 , 虫垂粘液瘤 , 虫垂周囲膿瘍 pp.1143-1154
Published Date 1990/10/25
DOI https://doi.org/10.11477/mf.1403111474
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 Study was undertaken regarding the usefulness of a variety of imaging methodologies used in diagnosing 16 cases of an appendiceal mass in which histological examination was done preoperatively. In all cases in which appendectomy had not been done before, barium enema (BE) did not visualize appendix and colonofiberscopic examination (CF) was not useful in identifying the appendiceal orifice.

 Findings of malignancy were obtained by BE and CF in 2 caces of colon type appendiceal cancer, one of which case revealed Group V by biopsy. Seven cases of appendiceal mucocele exhibited the pattern highly resembling submucosal tumor and 3 of these with conspicuous protrusion into the cecal lumen had “headband fold”. On the other hand,CT scan and ultrasonographic examination (echo) were extremely useful in describing cystic pattern clearly demarcated by thin wall. Furthermore they detected a complication of pseudomyxoma peritonei, the presence of which was not suggested by BE and CF. Periappendiceal abscess presented with deformity and compression of the cecum by BE and CF, and with calcification and radiated spicular shadow by CT. Definitive diagnosis of periappendiceal abscess, however, was not possible by a single imaging technique. A retracted stump of the resected appendix mandates the confirmation by history-taking.

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