Book contents
- Pediatric Pathology of Hematopoietic and Histiocytic Disorders
- Pediatric Pathology of Hematopoietic and Histiocytic Disorders
- Copyright page
- Epigraph
- Contents
- Contributors
- Section I General Hematology and Hematopathology
- Section II Non-Neoplastic Hematologic Disorders of Blood and Bone Marrow
- Section III Non-Neoplastic Disorders of Extramedullary Lymphoid Tissues
- Section IV Neoplastic Disorders of Bone Marrow
- Chapter 9 Ancillary Tests
- Chapter 10 Juvenile Myelomonocytic Leukemia (JMML)
- Chapter 11 Myeloid/Lymphoid Neoplasms with Eosinophilia and Gene Rearrangement
- Chapter 12 Myeloproliferative Neoplasms (MPNs)
- Chapter 13 Childhood Myelodysplastic Syndromes (MDSs)
- Chapter 14 Acute Myeloid Leukemia with Related Precursor Neoplasms
- Chapter 15 Myeloid Neoplasms with Germline Predisposition
- Chapter 16 Blastic Plasmacytoid Dendritic Cell Neoplasms (BPDCNs)
- Chapter 17 Acute Leukemia of Ambiguous Lineage
- Chapter 18 Precursor Lymphoid Neoplasms
- Chapter 19 Solid Tumor Metastasis to the Bone Marrow
- Section V Mature Lymphoid Neoplasms
- Section VI Histiocytic Disorders and Neoplasms
- Index
- References
Chapter 18 - Precursor Lymphoid Neoplasms
from Section IV - Neoplastic Disorders of Bone Marrow
Published online by Cambridge University Press: 25 January 2024
- Pediatric Pathology of Hematopoietic and Histiocytic Disorders
- Pediatric Pathology of Hematopoietic and Histiocytic Disorders
- Copyright page
- Epigraph
- Contents
- Contributors
- Section I General Hematology and Hematopathology
- Section II Non-Neoplastic Hematologic Disorders of Blood and Bone Marrow
- Section III Non-Neoplastic Disorders of Extramedullary Lymphoid Tissues
- Section IV Neoplastic Disorders of Bone Marrow
- Chapter 9 Ancillary Tests
- Chapter 10 Juvenile Myelomonocytic Leukemia (JMML)
- Chapter 11 Myeloid/Lymphoid Neoplasms with Eosinophilia and Gene Rearrangement
- Chapter 12 Myeloproliferative Neoplasms (MPNs)
- Chapter 13 Childhood Myelodysplastic Syndromes (MDSs)
- Chapter 14 Acute Myeloid Leukemia with Related Precursor Neoplasms
- Chapter 15 Myeloid Neoplasms with Germline Predisposition
- Chapter 16 Blastic Plasmacytoid Dendritic Cell Neoplasms (BPDCNs)
- Chapter 17 Acute Leukemia of Ambiguous Lineage
- Chapter 18 Precursor Lymphoid Neoplasms
- Chapter 19 Solid Tumor Metastasis to the Bone Marrow
- Section V Mature Lymphoid Neoplasms
- Section VI Histiocytic Disorders and Neoplasms
- Index
- References
Summary
Lymphoblastic leukemias/lymphomas constitute a family of malignant lymphoid neoplasms that morphologically and immunophenotypically recapitulate the features of early lymphoid precursors of either B- or T-cell origin [1–4]. The distinction between acute lymphoblastic leukemia (ALL) and lymphoblastic lymphoma (LBL) is arbitrary [4]. The term LBL is used when the disease is confined to a predominant extramedullary mass lesion with no or minimal involvement (<25%) of peripheral blood and bone marrow (BM). The cases with ≥25% blasts in either peripheral blood or BM are staged and treated as ALL [1,4].
ALL and LBL have many characteristics in common. They are morphologically indistinguishable, share similar immunophenotypes, and have overlapping cytogenetic profiles. It is generally believed that the two entities are biologically equivalent, represent a clinical continuum or different stages of the same disease, and are categorized as such by the 2017 World Health Organization (WHO) classification scheme [2–5].
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- Pediatric Pathology of Hematopoietic and Histiocytic Disorders , pp. 208 - 226Publisher: Cambridge University PressPrint publication year: 2024