The following are the most common types. Leukemia - Diagnosed by blood tests and bone marrow biopsy. Causes of most leukemias are unknown. Of the estimated 1,700 deaths from childhood cancer in 1997, about one third of them are from leukemia. Symptoms include fatigue, weight loss, bruising easily, nosebleeds, repeated infections, and weight loss.
Chronic leukemia can progress slowly and with few symptoms.
Ewing's sarcoma - Another type of cancer of the bone. Neuroblastoma - Can appear anywhere but usually appears in the abdomen, where a swelling occurs. Rhabdomyosarcoma - The most common soft tissue sarcoma. It can occur in the head and neck area, genital-urinary area, trunk, and extremities. Lymphomas and Hodgkin's disease - Lymph node cancers.