<prompt> All of the following are examples of a round cell tumor, except -NeuroblastomaEwings sarcomaNon Hodgkins LymphomaOsteosarcoma  <response>: osteosarcoma is not a round cell tumour but all others are. the lace-like pattern of neoplastic bone produced by anaplastic tumour cells is seen here. Source robbins basic pathology 7tyh edition page no.1295. chapter bones, joints and soft tissue tumours. 