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Related Concept Videos

Rheumatic Heart Disease I: Introduction01:23

Rheumatic Heart Disease I: Introduction

Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies01:22

Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies

The key clinical manifestations of Rheumatic heart disease (RHD) include several distinct cardiac symptoms.Carditis, a hallmark of acute rheumatic fever, involves inflammation of the heart's endocardium, myocardium, and pericardium. Chronic RHD often results from recurrent episodes of carditis. Its symptoms include the following:Murmurs are caused by valvular damage, especially to the mitral and aortic valves. Mitral stenosis or regurgitation is common, with characteristic heart murmurs...
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Chronic Inflammation: Introduction01:12

Chronic Inflammation: Introduction

Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
Fibril-associated Collagen01:11

Fibril-associated Collagen

Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...

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Related Experiment Video

Updated: Jun 27, 2026

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
06:35

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis

Published on: February 8, 2019

Fibroblastic rheumatism.

I M L Marconi1, M C Rivitti-Machado, M N Sotto

  • 1Department of Dermatology, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil. isabelamarconi@gmail.com

Clinical and Experimental Dermatology
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Fibroblastic rheumatism (FR) is a rare condition. This report details the first Latin American patient with FR, presenting unique severe skin and joint symptoms, highlighting diagnostic and treatment challenges.

Related Experiment Videos

Last Updated: Jun 27, 2026

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
06:35

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis

Published on: February 8, 2019

Area of Science:

  • Rheumatology
  • Dermatology
  • Histopathology

Background:

  • Fibroblastic rheumatism (FR) is a rare disorder with an unknown etiology, first described in 1980.
  • Few cases have been documented globally since its initial description.

Observation:

  • The first reported Latin American patient with FR presented with significant dermatological manifestations.
  • Clinical presentation included subcutaneous nodules and severe polyarthropathy with digital flexion contractures.

Findings:

  • Histopathology revealed dense fibroblastic proliferation, thickened collagen, dermal fibrosis, and reduced elastic fibers.
  • Immunohistochemistry confirmed myofibroblastic differentiation, indicated by positive staining for beta-catenin, alpha-smooth muscle actin, and HHF-35.
  • Prednisone treatment showed minimal effect on nodules and no improvement in rheumatological symptoms.

Implications:

  • This case expands the known clinical spectrum of Fibroblastic rheumatism, particularly its dermatological impact.
  • The poor response to prednisone underscores the need for further research into effective therapeutic strategies for FR.
  • Identifying novel treatments is crucial given the limited efficacy of current interventions for this rare condition.