Renal tumors other than Wilms’ tumor are infrequent in childhood. Wilms’ tumors account for 6% to 7% of childhood cancer, whereas the remaining renal tumors account for less than l%.27 The most common nonWilms‘ tumors are clear cell sarcoma of the kidney, rhabdoid tumor of the kidney (both formerly considered unfavorable Wilms’ tumor variants but now considered separate tumors), renal cell carc...

Brain tumors are the second most common cancer in children after leukemia and constitute about 20% of all childhood cancers in the United States (1). The annual incidence is approximately 34 pen million children under 15 years of age. The incidence may be rising; the U.S. National Cancer Institute reported an increase in the period 1973-1988 (1). With a 5-year relative survival rate of approxim...

Childhood brain tumors are not just the same tumors that arise in adulthood. Brain tumors in children and adults differ significantly in their incidence, tumor type, and treatment. Overall, survival rates for those with brain tumors are better in childhood than in the adult years. However, the immaturity of the child's brain makes treatment decisions difficult, especially in infants. The majori...

We present the case of a 30-year female patient with multiple systemic metastases of posterior fossa primitive neuroectodermal tumor (PF- PNET) and present a review concerning the usual presentation, sign and symptoms, radiological aspects, pathways of spread, genetic patterns and treatment of PF-PNET. The biological behavior of PF - PNET is analyzed taking into consideration the presence of sy...

Background:Unilateral tumors or masses of the adrenal gland are common. They are categorized as either functional (hormone-secreting) or silent and as either benign or malignant. Adrenocortical tumors are rare in childhood, with an incidence of 0.3-0.5 cases per one million child-years. Almost half of childhood tumors are adrenocortical carcinomas (ACC). Most ACCs are sporadic, but specialy i...

The image recognotion and the classification of objects according to the images are more in focus of interests, especially in medicine. A mathematical procedure allows us, not only to evaluate the amount of data per se, but also ensures that each image is pro- cessed similarly. Here in this study, we propose the power of shape analysis, in conjunction with neural networks for reducing white n...

Brain tumors are the most common solid tumors in childhood. Glioblastoma multiform (GBM) is the second most common primary brain tumor in adults. It usually affects the cerebral hemispheres of adults at the 6th or 7th decade of life. In comparison to adult population, GBM is rare in pediatrics and accounts for approximately 3% of all pediatric brain tumors. Pediatric glioblastoma was defined as...

abstract objective tumors of the central nervous system constitute the largest group of solid neoplasms in children and are second only to leukemia in their overall frequency during childhood. the main purpose of the present study is to determine the incidence, age, sex, location and histological diagnosis of cns tumors in children, less than 15 years of age, in the mofid children's hospital, i...