Hull midfielder Ryan Mason is set for a long period of rehabilitation treatment after being discharged from hospital, his Premier League club said.

The 25-year-old -- capped once by England -- fractured his skull in a horrific clash of heads with Chelsea defender Gary Cahill in the first-half of the 2-0 defeat at Stamford Bridge and was stretchered off the pitch attached to an oxygen mask.

Mason -- sold to Hull by Tottenham Hotspur for a reported £13million (15.3m, $16.3) just prior to the beginning of this season -- has made 'excellent' progress since that according to Hull to the extent he has been discharged from hospital.

However, it is believed it will be at least four months till he can start training again and he will need a medical all clear before he does so -- others such as Czech goalkeeper Petr Cech have returned to action though he wears protective head gear.

"Ryan will now continue his recovery and early stages of rehabilitation at home and the club would once again like to place on record its thanks to everybody who has been involved in Ryan's care so far," a club statement read.

Mason wasn't short of well wishers during his stay in hospital being visited by the members of Hull's medical team, whose prompt work was heralded as being key to the player's recovery.