Related Experiment Video
Updated: Jan 30, 2026
09:10
Generation of Lymph Node-fat Pad Chimeras for the Study of Lymph Node Stromal Cell Origin
Published on: December 16, 2013
6.4K
What Is the Color of Your Lymph Node?
Yeela Ben Naftali1, Asia Brodsky2, Eran D Bar-Meir3
1Plastic Surgery Department, Rambam Healthcare Campus and Rappaport Faculty of Medicine, Technion, Haifa, Israel.
Plastic and Reconstructive Surgery. Global Open
|January 19, 2019
Summary
Tattoo ink can deposit in axillary lymph nodes, appearing during surgery. Recognizing this pigment is crucial to prevent misdiagnosis and ensure correct patient management.
Area of Science:
- Surgical Pathology
- Oncology
- Dermatology
Background:
- Axillary lymph node examination is critical during breast cancer surgery.
- Pigment deposition in lymph nodes can mimic metastatic disease.
Observation:
- Pigment deposition from tattoos was observed within an axillary lymph node.
- The observation occurred during an axillary dissection and mastectomy procedure.
- The ink appeared as dark granules within the nodal tissue.
Findings:
- Tattoo ink deposition in axillary lymph nodes is a recognized phenomenon.
- Histological examination confirmed the presence of exogenous pigment.
- The ink did not appear to be associated with malignancy in this case.
Implications:
- Accurate identification of tattoo ink prevents misinterpretation as metastatic disease.
- Knowledge of this finding aids surgeons and pathologists in avoiding diagnostic errors.
- Patient counseling regarding potential lymph node pigmentation may be beneficial.
Related Concept Videos
01:23Detailed Structure and Function of Lymph Nodes
4.7K
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...
4.7K
03:02Colors and Magnetism
14.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.1K
01:24Color Vision
1.5K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.5K
01:14Node Analysis for AC Circuits
676
Consider an angioplasty system featuring a catheter equipped with a turbine, a critical tool for removing plaque deposits from coronary arteries. This intricate medical device operates using a circuit model reminiscent of a dual-node RLC circuit powered by a current-controlled voltage source.
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
676
01:14Changes in Skin Color: Clinical Perspectives
3.5K
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
3.5K
01:16Lymphatic Vessels and Lymph Transport
23.3K
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...
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular...
23.3K