CD99-positive undifferentiated round cell sarcoma diagnosed on fine needle aspiration cytology, later found to harbour a CIC-DUX4 translocation: a recently described entity.

@article{Kajtr2014CD99positiveUR,
  title={CD99-positive undifferentiated round cell sarcoma diagnosed on fine needle aspiration cytology, later found to harbour a CIC-DUX4 translocation: a recently described entity.},
  author={B{\'e}la Kajt{\'a}r and Tam{\'a}s Torn{\'o}czky and E. Kalman and J{\'o}zsef Kuzsner and P. C. W. Hogendoorn and K{\'a}roly Szuhai},
  journal={Cytopathology : official journal of the British Society for Clinical Cytology},
  year={2014},
  volume={25 2},
  pages={
          129-32
        }
}
IntroductionPoorly differentiated, small round cell sarcomasoften represent a serious differential diagnostic prob-lem. CD99 expression was initially considered to bespecific for Ewing sarcoma (ES); however, it mayalso be seen in many histologically similar neo-plasms. The differential diagnosis of these tumoursincludes mesenchymal chondrosarcoma, poorly dif-ferentiated synovial sarcoma and lymphoblastic lym-phoma. However, rarely, CD99 expression mayappear in other neoplasms of a similar… CONTINUE READING

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