An Unusual Journey From Lymphoma to Sarcoma: Presumed Transdifferentiation of Diffuse Large B‐Cell Lymphoma to Follicular Dendritic Cell Sarcoma—A Case Study. - Nozheh, Aysan; Ameli, Fereshteh; Saffar, Hana; Lotfi, Maryam; Sadrian, Amirabbas; Sen, Kalyani (Case Reports in Hematology, 2026)