Related Experiment Video
Updated: Jun 12, 2026

10:04
Enhancing Tumor Content through Tumor Macrodissection
Published on: February 12, 2022
[Primary mediastinal large B-cell lymphoma: histopathologic features. A specific tumour]
J Andriamparany1, J Margery, B Grand
1Service d'anatomie pathologique, hôpital d'instruction des armées Percy, 101, avenue Henri-Barbusse, 92141 Clamart cedex, France.
Revue De Pneumologie Clinique
|June 22, 2010
Summary
Mediastinal diffuse large B-cell lymphoma is now recognized as a distinct entity. Diagnosis relies on immunohistochemistry and molecular studies, differentiating it from other tumors with similar presentations.
Area of Science:
- Oncology
- Hematology
- Pathology
Background:
- Diffuse large B-cell lymphomas of the mediastinum were historically classified as variants of classic large B-cell lymphomas.
- Clinical and radiological presentations, along with histopathological variants, suggested differential diagnoses including Hodgkin's disease, anaplastic lymphomas, thymic tumors, germ cell tumors, or metastatic tumors.
Observation:
- Immunohistochemical findings are crucial for accurate diagnosis.
- Recent advancements include the integration of molecular studies to refine classification.
Findings:
- Mediastinal diffuse large B-cell lymphomas are now considered a distinct entity.
- This classification is supported by unique clinical, pathological, and molecular characteristics.
- These distinct features also correlate with a different patient outcome.
Implications:
- Improved diagnostic accuracy for mediastinal lymphomas.
- Enhanced understanding of B-cell lymphoma heterogeneity.
- Potential for tailored therapeutic strategies based on distinct disease characteristics.
Related Concept Videos
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...
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 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...
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...
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...
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...
Detailed Structure and Function of Lymph Nodes
Lymph nodes are bean-shaped structures that cluster along the lymphatic vessels in the inguinal, axillary, and cervical regions. Each node is divided into compartments by a capsule that extends trabeculae inward.
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
Special Features of Adaptive Immunity
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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...