Study: NCT04017260

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: open and closed approach
Description: The patients were hospitalized, and the site of the operation was shaved on the day of the surgery. All Patients were operated on under spinal anesthesia. Antibiotic was administered to all patients as prophylaxis 60 minutes prior to the surgery. An adhesive tape was used to part the buttocks. The patients were placed in the jack-knife position. (Fig. 1). Methylene blue was injected without pressure through the external opening to delineate the sinus. The operation site was cleaned with 10% povidone-iodine. All sinus tracts were resected en bloc via elliptical incision down to presacral fascia with meticulous hemostasis.~Group A:The wound was closed with 0 polypropylene u-shaped sutures .

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Rhomboid flap technique
Description: The patients were hospitalized, and the site of the operation was shaved on the day of the surgery. All Patients were operated on under spinal anesthesia. Antibiotic was administered to all patients as prophylaxis 60 minutes prior to the surgery. An adhesive tape was used to part the buttocks. The patients were placed in the jack-knife position. (Fig. 1). Methylene blue was injected without pressure through the external opening to delineate the sinus. The operation site was cleaned with 10% povidone-iodine. All sinus tracts were resected en bloc via elliptical incision down to presacral fascia with meticulous hemostasis.Rhomboid flap technique: involve closure of the defect after excision of all sinuses with Rhomboid flap of skin and subcutaneous tissue

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Karydakis technique
Description: The patients were hospitalized, and the site of the operation was shaved on the day of the surgery. All Patients were operated on under spinal anesthesia. Antibiotic was administered to all patients as prophylaxis 60 minutes prior to the surgery. An adhesive tape was used to part the buttocks. The patients were placed in the jack-knife position. (Fig. 1). Methylene blue was injected without pressure through the external opening to delineate the sinus. The operation site was cleaned with 10% povidone-iodine. All sinus tracts were resected en bloc via elliptical incision down to presacral fascia with meticulous hemostasis.the long axis of the ellipse is parallel to the midline and 2cm from it.undercutting incision is made along the whole length 1cm below the skin surface then unrolling the flap over the midline.

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: open technique
Description: The patients were hospitalized, and the site of the operation was shaved on the day of the surgery. All Patients were operated on under spinal anesthesia. Antibiotic was administered to all patients as prophylaxis 60 minutes prior to the surgery. An adhesive tape was used to part the buttocks. The patients were placed in the jack-knife position. (Fig. 1). Methylene blue was injected without pressure through the external opening to delineate the sinus. The operation site was cleaned with 10% povidone-iodine. All sinus tracts were resected en bloc via elliptical incision down to presacral fascia with meticulous hemostasis.Open procedure involved a wide excision of the pilonidal sinus tract and healing by secondary intention.