ABSTRACT
All solid tumors are rare in childhood. One in 600 children develops cancer before 16 years of age, 33% of these are leukemias and 25% brain tumors. After the more common pediatric malignancies discussed in chapters 37 and 38, notably Wilms’ tumor, neuroblastoma and the lymphomas, the following tumors are the most prevalent pediatric malignancies:
Rhabdomyosarcoma • Liver tumors, including hepatoblastoma and hepato-• cellular carcinoma Germ cell tumors-extragonadal and gonadal • Non-rhabdomyomatous soft tissue tumors •
Collectively these tumors account for up to 15% of pediatric malignancies although individually they are all very uncommon. Because of their rarity, they present a diagnostic challenge to the radiologist who encounters only an occasional case. This chapter reviews the clinical and imaging features of uncommon tumors in children and adolescents.
