Small cell pattern of ALK‐negative anaplastic large cell lymphoma with double‐hit rearrangements of DUSP22 and TP63 oleh Yui Niiyama‐Uchibori, Shinsuke Mizutani, Taku Tsukamoto, Haruya Okamoto, Daisuke Ide, Akio Onishi, Daishi Kato, Takahiro Fujino, Yuji Shimira, Aya Miyagawa‐Hayashino, Eiichi Konishi, Kennosuke Karube, Yasuhito Nannya, Junya Kuroda