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Related Concept Videos

Allergic Drug Reactions01:27

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...
Allergic Reactions02:06

Allergic Reactions

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Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...

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Related Experiment Video

Updated: Jun 15, 2026

Animal Model of Implant-Associated Infections in Mice
07:02

Animal Model of Implant-Associated Infections in Mice

Published on: June 27, 2025

[Implant allergies].

P Thomas1, M Thomsen

  • 1Klinik und Poliklinik für Dermatologie und Allergologie, Ludwig-Maximilians-Universität München, Frauenlobstr. 9-11, 80337, München. Peter.Thomas@med.uni-muenchen.de

Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, Und Verwandte Gebiete
|March 6, 2010
PubMed
Summary
This summary is machine-generated.

Implant allergy, often caused by metal or cement components, can lead to various complications. Diagnosing implant allergy requires excluding infection and using patch tests alongside tissue analysis.

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Area of Science:

  • Biomaterials Science
  • Allergy and Immunology
  • Orthopedic Surgery

Context:

  • Osteosynthesis and artificial joint replacements are increasingly common.
  • Mechanical issues and infection are primary implant complications.
  • Metal (nickel, chromium, cobalt) and cement (acrylates, gentamicin) components can be contact allergens.

Purpose:

  • To review potential implant allergies and diagnostic challenges.
  • To discuss manifestations and diagnostic approaches for implant allergy.
  • To provide recommendations for metal-allergic patients undergoing orthopedic procedures.

Summary:

  • Implant intolerance reactions can manifest as eczema, delayed healing, effusions, pain, and loosening.
  • Diagnosing implant allergy is challenging, necessitating exclusion of infection via patch testing and peri-implant tissue histopathology.
  • Titanium-based materials are recommended for metal-allergic patients; metal-metal couplings in arthroplasty are contraindicated.

Impact:

  • Highlights the difficulty in diagnosing implant allergy and the need for differential diagnosis from infection.
  • Recommends specific diagnostic strategies combining clinical evaluation with allergologic and histopathologic testing.
  • Guides clinical practice by suggesting material choices for metal-allergic patients, favoring titanium and cautioning against metal-metal articulations.