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Specifically, we report two cases of functional chronic constipation: fecal retention in the rectum and not fecal retention in the rectum. In the not fecal retention in the rectum patient, ultrasonography showed no evidence of fecal retention in the rectum, including no rectal fecaloma, whereas in the fecal retention in the rectum patient, fecal retention in the rectum was clearly recognized. Moreover, ultrasonography can guide the choice of laxative, enema, or appropriate manual maneuver to treat chronic constipation. As a simple and noninvasive method for assessing functional chronic constipation in adults, ultrasonography not only provides important clinical information but can also aid in determining the location of fecal retention.<\/jats:p>","DOI":"10.1177\/2050313x17694234","type":"journal-article","created":{"date-parts":[[2017,2,17]],"date-time":"2017-02-17T05:08:33Z","timestamp":1487308113000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":16,"title":["Ultrasonographic follow-up of functional chronic constipation in adults: A report of two cases"],"prefix":"10.1177","volume":"5","author":[{"given":"Koichi","family":"Yabunaka","sequence":"first","affiliation":[{"name":"Department of Gerontological Nursing and Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, 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