Secondary T‐Lymphoblastic Lymphoma With KMT2A::MAML2 Rearrangement Following Myeloid Sarcoma and RUNX1::RUNX1T1‐Positive Acute Myeloid Leukemia

Key Points

• To highlight the occurrence of secondary T-lymphoblastic lymphoma with specific genetic rearrangements following previous hematological malignancies.
• Case report detailing patient history and genetic analysis of tumors.
• Identified KMT2A::MAML2 rearrangement in the T-lymphoblastic lymphoma.
• Documented prior occurrences of myeloid sarcoma and RUNX1::RUNX1T1-positive acute myeloid leukemia.