ROUND CELL LESIONS OF BONE
Langerhans cell histiocytosis[G] (esp. eosinophilic granuloma)
; Burkitt's lymphoma
Multiple myeloma; plasmacytoma
Primitive neuroectodermal tumor (PNET)
* Small blue round cell tumor that is identical radiologically with Ewing sarcoma but can often be distinguished histologically, particularly with immunohistochemical studies.