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Use of endoscopic ultrasonography in diagnostics of rectal low-ampullar malignant neoplasms has permitted to the authors to define the list of intersphincteric resection indications consisted in total mesorectumectomy and rectal and interior sphincter resection. The method of spheroidal reservoir formation with artificial unstriped muscular sphincter-cuff has been developed for the prophylaxis of anal incontinence and multimoment emptying after intersphincter resection with the colon bringing down. 14 patients have been operated with survey time up to 3,5 years. According to the data of clinical investigations the spheroidal reservoir form with small initial size and with the ability to extensibility as well as autonomous obturator function of striped muscular sphincter have become the basic conditions for the restoration of continence act and stool frequency in far period after intersphincter resection.

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