Naoki Takeda, Naohiro Makise, Hajime Kageyama, Tsukasa Takahashi, Hiroshi Katoh, Akiko Odaka, Mariko Oikawa, Takahiro Sugiyama, Hidetada Kawana, Akinobu Araki, Hideyuki Kinoshita, Yoko Hagiwara, Hiroto Kamoda, Tsukasa Yonemoto, Makiko Itami
EWSR1::NFATC2 sarcoma, a rare round cell sarcoma constituting the majority of EWSR1::non-ETS sarcomas, has recently been defined in the latest WHO classification. To date, the cytological findings of EWSR1::NFATC2 sarcoma remain undocumented. We present the case of a 25-year-old man with a history of polyostotic fibrous dysplasia in the right leg, referred to our hospital with left thigh pain. Cytological findings included metachromasia, minimally pleomorphic round cells, and eosinophilic infiltration. There was no precursor fibrous dysplasia and the initial diagnosis was undifferentiated pleomorphic sarcoma...
March 14, 2024: Virchows Archiv: An International Journal of Pathology