[Tissue expansion: histological aspects and value in the treatment of scars of the scalp].

The authors start by recalling the principal histomorphological and physiological characteristics of skin tissues subjected to expansion, in particular their hyper-vascularisation which allows the raising of vast flaps of excellent quality. After presenting the major principles, they then present their clinical experience in the context of reconstructive surgery of the scalp, particularly in the correction of Juri flap scars used in the treatment of baldness. Finally, they emphasise the great potential of this technique in the whole field of reconstructive surgery.