Several fistula orifices are visible in the anal cleft. Probing demonstrates fistulization nearly to the posterior anal verge. The fistulizing sinuses are marked with a dye (toluidine blue) (this ensures complete excision of all secondary sinuses).
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Exposing the fistulizing sinuses
![Exposing the fistulizing sinuses]()
Soundsettings
En-bloc excision
Complete oval excision of the entire chronically infected tissue. All tissue marked blue must be sa
Complete oval excision of the entire chronically infected tissue. All tissue marked blue must be sa
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