Essay Childhood Cancer : An Abnormal Growth Of Cells
Abstract: Cancer is an abnormal growth of cells which tend to proliferate in an uncontrolled way and, in some cases, to metastasize (spread).
Cancer can involve any tissue of the body and have many different forms in each body area. Most cancers are named for the type of cell or organ in which they start. If a cancer spreads (metastasizes), the new tumor bears the same name as the original (primary) tumor.
Cancer is the Latin word for crab. The ancients used the word to mean a malignancy, doubtless because of the crab-like tenacity a malignant tumor sometimes seems to show in grasping the tissues it invades. Cancer may also be called malignancy, a malignant tumor, or a neoplasm (literally, a new growth).
KEY WORDS: CANCER HBV, EBV, CHEMOTHERAPY, RADIOTHERAPY, BONE MARROW
Introduction: A cancer diagnosis is upsetting at any age, but especially so when the patient is a child. Childhood cancer is the second leading cause of death in children aged 1 to 14 years. During childhood there are changing incidences for various types of cancer. For children in all pediatric age-group, leukemia is the most frequent type of cancer, followed by brain tumors and lymphoma.
Familial and genetic factors are identified in 5-15% of childhood cancer cases. In s highest incidence of hepatocellular carcinoma (liver cancer). The precise role of hepatitis B virus in causing liver cancer is not yet understood, but evidence suggests that viral proteins disrupt…