A 14-year-old boy, Emanuel Zayas, who underwent a surgery to remove 10-pound tumor from his face has died.

 "Our condolences and prayers for Emanuel's family and the loss of a very brave young man," Dr. Robert E. Marx, a surgeon at Jackson Memorial Hospital was quoted saying by NBC 6.

 Zayas was suffering from polyostotic fibrous dysplacia which causes developmentally certain bones to become soft. The diseases had caused a 10-pound tumour to develop on his face.

He was operated and showed progress initially.

"I am saddened by the fact that we are losing him and that apparently, the physiologic stress of the surgery was too much for his compromised anatomy to overcome," Marx said.

"Our hopes of saving his life and in doing so would allow him a better quality of life have not been realized."