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A Novel Case of Concurrent T-cell and Early T-cell Precursor Lymphoblastic Lymphoma in an Adolescent Female

In the context of an evolving understanding of early T-cell precursor (ETP) lymphoma and leukemia, we present a case of concurrent T-cell lymphoblastic lymphoma and ETP lymphoma in an adolescent female. To our knowledge, this represents the first reported case of both lymphoblastic lymphoma and ETP lymphoma as distinct and conjoined components of the same neoplasm. As an exception to current literature, our patient had a strictly lymphomatous ETP component with no leukemic manifestation. Her ETP component remained viable following induction, supporting ETP resistance to chemotherapy. The patient remains in remission 4 years postallogeneic matched sibling donor bone marrow transplant.