Popis: |
The configuration of perianal sepsis and the relationship of abscesses or fistulae with internal and external sphincters are the most important factors influencing the results of surgical management. Preoperative identification of all loculate purulent areas, and definition of the anatomy of the primary fistulous tract, secondary extensions, and the internal opening play an important role in adequate planning of the operative approach, in order to ensure complete drainage of abscesses, prevent early recurrence after surgical treatment for anal fistulae, and to minimize iatrogenic damage of sphincters and the risk of minor or major degrees of incontinence. In this chapter, technical aspects and imaging interpretations of endoanal ultrasonography in the evaluation of perianal abscesses and fistulae will be presented. Accuracy and reliability of this modality and in comparison with transperineal ultrasound and magnetic resonance imaging are also discussed. |