My name's Nick. I'm 15 and I love football! I'm in the school team, and every weekend, my dad and I will have a kick about as well.
One morning about a month ago, I woke up thinking I must have hurt my knee. It hurt when I ran and I couldn't even finish the match that day.
My coach told me to rest and I gave up football for that week, but my knee still hurt. It even started to wake me up at night. Dad got me a bandage for my knee and Mum took me to see a friend of hers who gave it a massage.
I tried to go back to football training, but it was so painful I had to stop. The coach even thought my knee looked a bit swollen.
When I woke up yesterday, I couldn't even get out of bed. I had to tell Mum and Dad because my leg was really sore. Dad took the day off work so he and Mum could take me to the doctor. I think they knew I wasn't feeling well.
The doctor was really nice. She asked me loads of questions and did some blood tests and scans. She then called us all into the room. I remember thinking that she wasn't smiling anymore.
The doctor said I have osteosarcoma. She said it's a type of cancer. I just sat there while Dad asked lots of questions. Mum was crying. For the first time, I felt scared.
What is osteosarcoma?
Osteosarcoma is the commonest bone cancer affecting children and adolescents. It tends to occur more frequently in boys, particularly around puberty when bones grow more quickly.
In Malaysia, about 800 children below the age of 18 are diagnosed with cancer each year, and osteosarcoma accounts for approximately 3 per cent of such cancer diagnoses.