Fine needle aspiration cytology diagnosis of paravertebral extraosseus Ewing's sarcoma

摘要

Extraskeletai Ewing's sarcoma (EES) is a rare tumor. Paravertebral Ewing's sarcoma requires more extensive therapy as compared to Ewing's sarcoma of bone. Fine needle aspiration cytology (FNAC) plays an important role in the early diagnosis of these cases. We present a case where paravertebral extraosseous Ewing's sarcoma was diagnosed on FNAC in a 19-year-old girl. Ewing's sarcoma of bone (ES), extraskeletai Ewing's sarcoma (EES) and primitive peripheral neuroectodermal tumor (pPNET) are now considered to be the same tumor with variable differentiation and no significant biological or therapeutic distinction.111 With a change in treatment modality of Ewing's-pPNET family of tumors by preoperative chemotherapy, fine needle aspiration cytology (FNAC)plays a useful role in the diagnosis of these lesions with obvious advantage over the openeedle core biopsy.