All of the following are examples of a round cell tumor, except -: (A) Neuroblastoma, (B) Ewing's sarcoma, (C) Non Hodgkin's Lymphoma, (D) Osteosarcoma
Answer is D. 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.