Abstract
Abstract Benign tumours of the rectum may be destroyed by diathermy or cryotherapy, or may be locally excised using a urological resectoscope or by more invasive techniques such as the York-Mason trans-sphincteric resection1,2. Transanal endoscopic microsurgical excision of such tumours has the advantage of allowing a magnified view during excision, which enables resection of an unfragmented specimen with clear margins3. More proximal lesions can also be resected. However, the technique requires a prolonged period of anal dilatation using a 4-cm diameter sigmoidoscope, which may compromise sphincter function4,5. The aim of this prospective study was to examine sphincter function before and after transanal endoscopic microsurgical excision of rectal tumours.
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