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Related Concept Videos

Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Primary Lymphoid Organs01:16

Primary Lymphoid Organs

Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
Disorders of Leukocytes01:27

Disorders of Leukocytes

Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune system...
Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...

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Related Experiment Video

Updated: Jun 4, 2026

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
10:52

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Published on: March 30, 2018

Lymphoblastic lymphoma.

Sergio Cortelazzo1, Maurilio Ponzoni, Andrés J M Ferreri

  • 1Hematology and Bone Marrow Transplantation Unit, Azienda Ospedaliera, Bolzano, Italy.

Critical Reviews in Oncology/Hematology
|January 29, 2011
PubMed
Summary
This summary is machine-generated.

Lymphoblastic lymphoma (LBL) is an aggressive cancer of immature B or T cells. Intensive chemotherapy offers high cure rates, especially in children, with stem cell transplant for advanced cases.

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Wild-type Blocking PCR Combined with Sanger Sequencing for Detection of Low-frequency Somatic Mutation
07:17

Wild-type Blocking PCR Combined with Sanger Sequencing for Detection of Low-frequency Somatic Mutation

Published on: August 23, 2024

Related Experiment Videos

Last Updated: Jun 4, 2026

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
10:52

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Published on: March 30, 2018

Wild-type Blocking PCR Combined with Sanger Sequencing for Detection of Low-frequency Somatic Mutation
07:17

Wild-type Blocking PCR Combined with Sanger Sequencing for Detection of Low-frequency Somatic Mutation

Published on: August 23, 2024

Area of Science:

  • Hematology
  • Oncology
  • Immunophenotyping

Background:

  • Lymphoblastic lymphoma (LBL) is a rare neoplasm, comprising 2% of lymphomas, originating from immature B or T lymphocytes.
  • Histopathological diagnosis can be challenging, requiring differentiation from other aggressive lymphomas and leukemias.
  • Immunophenotyping by flow cytometry is crucial for accurate lineage assignment and diagnosis.

Purpose of the Study:

  • To provide a comprehensive overview of lymphoblastic lymphoma (LBL), covering its pathology, immunophenotypic characteristics, clinical presentation, and treatment outcomes.
  • To highlight the diagnostic challenges and the importance of immunophenotyping in distinguishing B-LBL from T-LBL.
  • To summarize current therapeutic strategies and prognostic factors for LBL across different age groups.

Main Methods:

  • Review of histopathological features of LBL in tissue biopsies and bone marrow.
  • Analysis of immunophenotypic markers by flow cytometry for B-cell and T-cell lineage identification.
  • Correlation of clinical presentation, staging, and treatment responses with prognostic factors.

Main Results:

  • B-LBL typically expresses CD19, CD79a, CD22, and often CD10, CD24, PAX5, TdT, with variable CD20 and CD34 expression.
  • T-LBL is characterized by TdT positivity and variable expression of T-cell markers (CD1a-CD8), with surface CD3 being the most reliable indicator.
  • T-LBL commonly affects younger males, presenting with mediastinal masses or lymphadenopathy, while B-LBL has a higher incidence of bone marrow involvement.
  • Intensive chemotherapy, similar to acute lymphoblastic leukemia (ALL) regimens, has significantly improved survival rates, achieving 73-90% in children and 45-72% in adults.

Conclusions:

  • Accurate diagnosis of LBL relies on integrating histopathology with detailed immunophenotyping.
  • While aggressive, LBL is a curable malignancy with modern intensive chemotherapy regimens.
  • Stem cell transplantation (SCT) is a valuable option for patients with refractory disease or those requiring consolidation therapy.