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Related Concept Videos

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...
Hypersensitivity Reactions: Cytolytic Reactions01:01

Hypersensitivity Reactions: Cytolytic Reactions

Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
Endocarditis III: Medical Management01:18

Endocarditis III: Medical Management

Infective endocarditis management involves a multifaceted approach encompassing infection prevention, lifestyle modifications, pharmacological therapy, and surgical management.Infection Prevention:Hand Hygiene: Thorough handwashing is crucial to prevent the spread of infection. Hand hygiene should be performed regularly, especially before and after using the restroom.Oral Hygiene: Good oral hygiene is essential. It includes brushing teeth immediately after waking up and before bed, flossing...
Rheumatic Heart Disease III: Medical Management01:21

Rheumatic Heart Disease III: Medical Management

Rheumatic heart disease (RHD) management can be divided into two main strategies: prevention and long-term management.Primary PreventionPrimary prevention focuses on timely diagnosis and management of group A streptococcal pharyngitis to prevent acute rheumatic fever. The most widely used antibiotic for treating this condition is intramuscular benzathine penicillin G.Acute Rheumatic Fever TreatmentThe primary treatment goal for a patient diagnosed with acute rheumatic fever is to suppress the...
Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
Pericarditis III: Medical Management01:17

Pericarditis III: Medical Management

The primary objectives of managing pericarditis are to determine the underlying cause, provide effective therapy for treatment and symptom relief, and promptly detect signs and symptoms of cardiac tamponade. The following outlines the essential aspects of medical management for pericarditis:ObjectivesDetermine the Cause: Identifying the underlying cause of pericarditis is crucial for targeted treatment. Causes include viral infections, autoimmune diseases, post-cardiac injury syndrome, and...

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Related Experiment Video

Updated: Jun 9, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

[Hypocomplementemic vasculitis treated with dapsone].

M Hérault1, J Mazet, P Beurey

  • 1Service de dermatologie, hôpital Fournier, CHU de Nancy, 36, quai de la bataille, 54000 Nancy, France. ac.bursztejn@chu-nancy.fr

Annales De Dermatologie Et De Venereologie
|September 1, 2010
PubMed
Summary
This summary is machine-generated.

Hypocomplementemic urticarial vasculitis (MacDuffie syndrome) is a rare condition. This case study shows dapsone treatment led to significant improvement in a patient with this vasculitis.

Related Experiment Videos

Last Updated: Jun 9, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

Area of Science:

  • Rheumatology
  • Immunology
  • Dermatology

Background:

  • Hypocomplementemic urticarial vasculitis (MacDuffie syndrome) is a rare vasculitis with uncertain classification.
  • The condition presents with urticarial lesions, leucocytoclastic vasculitis, and systemic symptoms.
  • Its classification is debated, with some suggesting a link to systemic lupus erythematosus (SLE).

Observation:

  • A 43-year-old male experienced recurrent urticarial vasculitis with palpebral edema, fever, and arthralgia.
  • MacDuffie syndrome was diagnosed based on positive anti-C1q antibodies.
  • The patient presented with symptoms similar to SLE.

Findings:

  • Diagnosis relies on clinical presentation, histology, and anti-C1q antibodies.
  • Dapsone treatment resulted in considerable improvement for the patient.
  • No specific treatment exists, but immunosuppressants may be used for refractory cases.

Implications:

  • This case highlights dapsone as a potential treatment for hypocomplementemic urticarial vasculitis.
  • Further research may clarify the relationship between MacDuffie syndrome and SLE.
  • Accurate diagnosis and management are crucial for patients with this rare vasculitis.