non hodgkin cancernon hodgkin's lymphoma blood cancerhodgkin lymphoma pathologynon hodgkin's lymphoma prognosispediatric non hodgkin's lymphomaaggressive non hodgkin's lymphomanon hodgkin's lymphoma hereditarynon hodgkin's lymphoma curablenon hodgkin's follicular lymphomahodgkin's lymphoma geneticnon classical hodgkin lymphomadefine hodgkin's lymphoma