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Benefits of endorectal ultrasound for management of smooth-muscle tumor of the rectum

Report of three cases

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Smooth-muscle tumor of the rectum is rare, and the therapeutic strategy is still controversial. Endorectal ultrasound was used to evaluate three patients with smooth-muscle tumor of the rectum. Endorectal ultrasound demonstrated a homogenous hypoechoic tumor without invasion to the perirectal tissue in two patients. The tumor was 5 cm in diameter in one patient and 4 cm in diameter in the other patient, and they were excised locally. Their histologic types were leiomyoma and leiomyosarcoma. The third patient had a recurrent leiomyosarcoma. Proctosigmoidoscopy found a linear lesion with ulcerated mucosa on the rectal wall. Endorectal ultrasound observed a hypoechoic solid tumor of 3.5 cm×1 cm, which involved the mucosal, submucosal, and muscle layers of the rectal wall. Disruption of the first hypoechoic layer was identified. Abdominoperineal resection was performed. Endorectal ultrasound follow-up revealed no evidence of recurrence in any of these patients. Endorectal ultrasound can help to define the extent of disease and may be a useful adjunct in deciding about the appropriate surgical procedure in these diseases.

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Correspondence to Dr. Jan-Sing Hsieh M.D..

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Hsieh, J., Huang, C., Wang, J. et al. Benefits of endorectal ultrasound for management of smooth-muscle tumor of the rectum. Dis Colon Rectum 42, 1085–1088 (1999). https://doi.org/10.1007/BF02236709

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Key words

  • Smooth-muscle tumor
  • Rectum
  • Endorectal ultrasound