Biphenotypic siononasal sarcoma with acute exacerbation: A case report

Hiroshi Okuda, Bunya Kuze, Hirofumi Shibata, Hisamitsu Hayashi, Takesumi Nishihori, Keisuke Mizuta, Keishi Kohyama, Yuji Yasue, Hisakazu Kato, Mitsuhiro Aoki