<prompt> Most common GI malignancy of childhoodAdenocarcinomaLymphomaSarcomacarcinoid  <response>: Ans. is b i.e., Lymphoma Over all hemangioma is most common Tumor in infant. Hemangioma is usually benign in Nature. Leukemia is most common malignancy in pediatric age gyp. 2 most common is CNS Tumor Lymphoma is the most common malignancy of the gastrointestinal tract in children. About 30 of children with non-Hodgkin lymphoma present with abdominal tumors. 