Very unusual extremely high ferritin with cytokine release syndrome in a patient with hematological malignancy after experimental chimeric antigen receptor (CAR)–T-Cell therapy

Chimeric antigen receptor (CAR) T cell therapy is an immunotherapy that has resulted in tremendous progress in the treatment of patients with B cell malignancies. However, significant toxicities may also be associated with such therapy. Here we report extremely high ferritin in a male patient after such therapy.