Karydakis flap for pilonidal disease

At a glance

The Karydakis flap is a well-established surgical technique for pilonidal disease that excises the diseased tissue and closes the wound using an asymmetric skin flap placed off the midline. This off-midline closure is the key to its effectiveness — midline wounds in the natal cleft are prone to breakdown and recurrence, and the Karydakis technique avoids this.

How it works

The principle

The natal cleft midline is a problem area for wound healing. It is deep, moist, and subject to friction and shearing forces. Wounds closed directly in the midline have high rates of breakdown and disease recurrence.

George Karydakis developed his technique based on the observation that moving the wound off the midline dramatically improved outcomes. The procedure achieves this through:

1. Asymmetric excision — an elliptical excision that is slightly off-centre, removing all diseased tissue
2. Flap mobilisation — the skin on one side is undermined to create a flap
3. Off-midline closure — the flap is advanced to close the wound with the suture line positioned off the midline
4. Cleft flattening — the closure results in a shallower cleft in the operated area

The procedure

• Performed under general or spinal anaesthesia
• The diseased tissue is excised in an asymmetric ellipse
• A skin flap is mobilised from the deeper side
• The wound is closed in layers with the scar line off the midline
• A suction drain is usually placed
• The procedure typically takes one to two hours

Who it is suitable for

The Karydakis flap is suitable for:

• Primary pilonidal disease — as a definitive first treatment
• Recurrent disease — when previous treatments have failed
• Moderate complexity — disease that is too extensive for pit-picking but does not require a full cleft lift
• Multiple sinuses — the excision can encompass several tracts

Recovery

Week 1

• Drain typically removed within two to three days
• Limited sitting — a cushion is helpful
• Wound care involves keeping the closure clean and dry
• Pain is usually well managed with standard pain relief
• Light walking is encouraged

Weeks 2 to 3

• Sutures or staples removed
• Gradual return to normal sitting
• Most people return to desk work during this period
• The wound should be healing well along the off-midline closure

Weeks 3 to 6

• Full activities resume for most people
• The wound continues to strengthen
• Follow-up to confirm complete healing

Long term

• Hair removal in the area is commonly recommended
• Regular hygiene of the natal cleft
• Low but not zero recurrence risk
• The area may feel different — slightly flatter on the operated side

Compared to other techniques

The Karydakis flap and cleft lift share similar principles and outcomes. The choice between them often depends on surgeon preference and expertise, disease extent, and individual anatomy.