Aerosmith star's surgery to feature on TV special

Fans of Aerosmith are being given the chance to study singer Steven Tyler's famous vocal cords in a new TV documentary.

The rocker's recent throat surgery will feature as part of an upcoming medical special, Incredible Human Machine, on the National Geographic Channel.

Tyler's doctors were also interviewed about the 2006 procedure to save the frontman's voice.

Aerosmith had to scrap a series of shows when Tyler suffered damage to one of

his vocal cords.