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Related Concept Videos

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...
Detailed Structure and Function of Lymph Nodes01:23

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...
Development of the Lymphatic System01:15

Development of the Lymphatic System

The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
Lymphatic Vessels and Lymph Transport01:16

Lymphatic Vessels and Lymph Transport

Lymphatic vessels, known as lymphatics, are crucial in transporting lymph from peripheral tissues to our venous system. This process begins with lymph entering through tiny capillaries that branch through tissues. These capillaries have unique features such as larger diameters, thinner walls, and a distinctive one-way valve system formed by overlapping endothelial cells.
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular spaces.
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...

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Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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The ongoing problem with peripheral lymphadenopathies: which ones are malignant?

Ayşe Karaman1, Ibrahim Karaman, Yusuf Hakan Cavuşoğlu

  • 1Department of Pediatric Surgery, Dr. Sami Ulus Children's Hospital, Ankara, Turkey. ayseuk@gmail.com

Pediatric Surgery International
|October 10, 2009
PubMed
Summary

In children, an increased risk of malignancy in peripheral lymphadenopathy is associated with older age, specific locations like supraclavicular areas, and a hypoactive spleen nodule. These factors help identify potential cancers in pediatric patients.

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Area of Science:

  • Pediatric Oncology
  • Diagnostic Imaging
  • Pathology

Background:

  • Peripheral lymphadenopathy is common in children, but distinguishing benign from malignant causes can be challenging.
  • Accurate diagnosis is crucial for timely and appropriate treatment of pediatric malignancies.

Purpose of the Study:

  • To evaluate the risk of malignancy in childhood peripheral lymphadenopathy.
  • To identify clinical and imaging factors associated with malignant etiology.
  • To determine key indicators for malignancy in pediatric lymphadenopathy.

Main Methods:

  • Retrospective review of pediatric patients who underwent peripheral lymphadenopathy biopsy from 2005 to 2007.
  • Classification of patients into malignant and benign etiological groups.
  • Analysis of demographic, clinical, and imaging findings for distinguishing features.

Main Results:

  • The malignant group (32 patients) had higher mean age, shorter lymphadenopathy duration, and larger lymph node size compared to the benign group (52 patients).
  • Malignancy incidence was higher in supraclavicular and axillary lymphadenopathies. Hodgkin's disease was most common in the malignant group.
  • Abdominal and mediastinal lymphadenopathy had high malignancy rates (58.3% and 60%, respectively). A hypoactive spleen nodule was the strongest indicator of malignancy.

Conclusions:

  • Older age, supraclavicular or abdominal/mediastinal lymphadenopathy, and particularly a hypoactive spleen nodule are significant risk factors for malignancy in children.
  • These findings aid in risk stratification and diagnostic decision-making for pediatric peripheral lymphadenopathy.
  • Early identification of these indicators can improve diagnostic accuracy and patient outcomes.