TY - JOUR AR - JSO-2019-2-109 TI - Purely Intraparenchymal Plasmacytoma: A Diagnostic Conundrum. To Operate or Radiate? AU - Andrew  J., Kobets AU - Emad , Eskandar AU - James, Goodrich AU - Patrick , Lasala AU - Rose , Fluss AU - Vijay , Agarwal JO - Journal of Surgical Oncology PY - 2019 DA - Mon 22, Jul 2019 SN - 2674-3000 DO - http://dx.doi.org/10.31487/j.JSO.2019.02.09 UR - https://www.sciencerepository.org/purely-intraparenchymal-plasmacytoma-a-diagnostic-conundrum-to-operate-or-radiate-_JSO-2019-2-109 KW - Plasmacytoma, multiple myeloma, intraparenchymal, solitary, radiation, surgical resection AB - Intracranial plasmacytomas are rare entities that are thought to spread to the intraparenchymal space via pre-existing lesions from the dura or skull. Purely intraparenchymal plasmacytomas, without cranial or dural involvement, are therefore, rarer and seem to contradict the mechanism of spread that have been attributed to these lesions. Only a few cases of purely intraparenchymal lesions have been described in the literature, and they represent diagnostic conundrums when identified as they mimic the radiographic appearance of other parenchymal lesions, such as metastatic tumors or infectious collections. The authors report an unusual case of a purely intraparenchymal plasmacytoma in the right frontal lobe of a 68-year-old female with a known history of multiple myeloma. No evidence of extension from a cranial or dural-based lesion was found radiographically or intraoperatively and given the non-diagnostic radiographic features of this plasmacytoma, the diagnosis was made upon pathological examination after gross total resection. A review of the literature on purely intraparenchymal plasmacytomas is provided and the management and prognosis of these lesions are addressed.