Lymphomas and bone tumors: clinical presentation, management, and potential late effects of current treatment strategies.

While many pediatric malignancies are seen predominantly in pre-school children, many cases of childhood non-Hodgkin's lymphoma and most cases of Hodgkin's disease and bone tumors are seen in the older child and adolescent. This review focuses on current knowledge concerning the epidemiology, histopathology, molecular biology, clinical presentation, diagnosis, staging, treatment, and prognosis for older children and adolescents diagnosed with lymphoma or either of the two commonly seen childhood bone tumors, namely osteosarcoma and Ewing's sarcoma. Survival figures for all of these childhood malignancies have increased markedly in the past two decades. We now have the relatively new experience of having an increasingly large population of childhood cancer survivors to study and, unfortunately, are beginning to see the long-term consequences of these more successful treatments. This review concludes with an overview of the potential late effects of cancer therapy, effects that may first be detected by the primary care physician caring for the adolescent who is a cancer survivor.