Andrzej Kościesza

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BACKGROUND We encountered on seven malignant hepatocellular tumors developing in older children and adolescents. RESULTS These tumors exhibit an unusual phenotype with respect to clinical(More)
Neuroendocrine tumors (NET) are extremely rare in children (0.75 cases per 100,000 children and adolescents a year) and the majority of these tumors are benign or present low grade of malignancy.(More)