Abbe-Estlander flap is used in repair of:
The lip-switch (Abbe-Estlander) flap or a stair-step advancement technique can be used to repair defects of either the upper or lower lip. Microstomia is a potential complication with these types of lip reconstruction. Ref: Schwaz's principle of surgery 9th edition, chapter 18
Breast
Lip
Esophagus
None of the above