In 2002 Ms. Tong, then aged 20, had recently started a modelling career. She went to Mr. Leung, a dentist, complaining of intermittent severe pain in her jaw. Mr. Leung treated an infected tooth. Ms. Tong did not experience the pain for some time but early in 2004 it recurred more severely. Tests have shown that she is suffering from a cancerous condition and will require major surgery which will leave her disfigured. The medical evidence now is that early signs of her condition would normally have been detectable as early as 2001 and that there is a possibility that, if she had been treated in 2002, she would have experienced no disfigurement.