Disseminated non-Langerhans cell histiocytosis with an IRF2BP2-NTRK1 gene fusion identified by next-generation sequencing by Warren H. Chan, BS, Aatman Shah, MD, Gordon Bae, MD, Caely Hambro, MD, Beth A. Martin, MD, Ryanne Brown, MD, MBA, Roberto Novoa, MD, Bernice Y. Kwong, MD

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