What are tumors and tumor-like lesions in childhood?

Only 2% of all malignant tumors occur in infancy and childhood; nonetheless, cancer (including leukemia) accounts for about 9% of deaths in the US in children (4 -14 years). Benign more common than cancers, sometimes cause serious complications acc to size and location, difficult ot separate true tumors/neoplasms from tumor like lesions in infant/child. Most common are hemangioma, lymphangioma, fibrous lesions and teratomas. Most common neoplasms are Soft-tissue tumors of mesenchymal derivation, contrasts with adults where most common is epithelial origin.