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Brain tumours are the most common tumours that develop in children. Children of any age can be affected. About 400 children in the UK develop brain tumours each year. Boys are affected slightly more often than girls.

Lymphoma is a type of blood cancer. Lymphomas are the third most common group of children's cancers, accounting for around 1 in 10 new cases each year in the UK.

Osteosarcoma is a type of bone cancer. About 35 children in the UK develop osteosarcomas each year. These tumours occur more commonly in older children and teenagers and are very rarely seen in children under five.

Ewing sarcoma is a type of bone cancer in children and young people. It is the second most common primary bone sarcoma in children and young people. Approximately 30 children in the UK develop Ewing sarcoma each year. It usually occurs in the teenage years and is more common in boys.

Rhabdomyosarcoma is the most common soft tissue sarcoma in children. Around 55 children are diagnosed in the UK each year. Most of them are younger than 10 years old. It is more common in boys than girls.

Neuroblastoma is the second most common solid tumour in children after brain tumours and makes up 6% of the total number of childhood cancer diagnoses.

Wilms tumours are the most common type of kidney (renal) cancer in children. About 90 children in the UK are diagnosed with a Wilms tumour each year. It most often affects children under the age of seven.

Approximately 50 children in the UK develop malignant germ cell tumours each year. Most children who develop germ cell tumours will be cured.

Retinoblastoma is cancer of the retina, the light sensitive lining of the eye. It usually affects children under five and about 40 to 50 cases are diagnosed in the UK each year. Treatment is very effective and nearly all (98 out of 100) children with retinoblastoma are cured.

Approximately 20 children in the UK develop primary liver tumours each year. Boys are affected more commonly than girls. Liver tumours can be non-cancerous (benign) or cancerous (malignant). This information is about malignant liver tumours.