- Etiology: highly aggressive B-cell lymphoma
- Imaging: bulky RLQ mass with central necrosis, bowel wall thickening and mural masses causing intussusception, mesenteric vessel encasement, sandwich sign – bowel loops sandwiched between mesenteric masses, lymphadenopathy, lesions in kidneys / ovaries / breast / liver / spleen
- Clinical: most common form of non-Hodgkin lymphoma in children < 15 yo, peak age 5 years
