[Desmoid fibroma of the mandible in a child and one-stage reconstruction]. / Fibroma desmoide de la mandíbula de un niño y reconstrucción en un tiempo.

A 12-year-old patient case is reported, presented with a desmoid fibroma of the left pterygoid region, extended to the cortical and endosteal regions of the mandible, reconstructed immediately with a free peroneal flap, recovering with this both form and function. To date, 3 years from surgery, he has no complications. Evolution of this case and a brief review of the literature is reported. It is concluded that free peroneal graft for mandible reconstruction is safe and has excellent results, both aestethic and functional.