Question
A patient underwent surgery for pilonidal sinus, which type of flap is used in this surgery?
| A. |
Fasciocutaneous rotation flap |
| B. |
Bilobed flap |
| C. |
Transposition flap |
| D. |
Random pattern flap |
Show Answer
|
Correct Answer » C Explanation |
 |
- The image shows an off-midline flap with a rhomboid configuration.
- This appearance is characteristic of a Limberg (rhomboid) flap.
- The Limberg flap is a transposition flap.
- It is designed to flatten the natal cleft and move the suture line away from the midline, thereby reducing recurrence.
Explanation of the Correct Answer
- A transposition flap is a flap that is moved laterally across adjacent intact skin to cover a defect.
- The Limberg flap is the classic rhomboid transposition flap used in pilonidal sinus surgery.
- Therefore, based on the image, the correct answer is Transposition flap.
Why Other Options are Incorrect
A. Fasciocutaneous rotation flap
- Rotation flaps are semicircular flaps rotated into a defect.
- The flap shown is not a rotation flap.
B. Bilobed flap
- A bilobed flap consists of two sequential transposition lobes.
- It is commonly used for reconstruction of small facial defects, especially the nose.
- The flap shown in the image is a Limberg flap, not a bilobed flap.
D. Random pattern flap
- Random pattern refers to the vascular supply of the flap rather than the method of movement.
- The question asks for the type of flap based on its design.