Liverpool captain Steven Gerrard could be set for another lengthy spell on the sidelines after he was pictured leaving hospital with his right leg in a protective cast on Sunday.GettyImagesSteven Gerrard made a brief return, before his ankle was infected.Gerrard, 31, missed Liverpool's 2-0 win at West Brom on Saturday after contracting an infection in his right ankle during training. The skipper had only just returned from a groin injury (which was also complicated by an infection) that kept him out of action for six months.Liverpool manager Kenny Dalglish confirmed the cause of the problem after the game on Saturday, but refused to be drawn on his recovery time.''Steven has got an infection in his ankle,'' Dalglish said. 'He was