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Related Concept Videos

Introduction to Connective Tissues01:11

Introduction to Connective Tissues

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Connective tissues are one of the four main tissue types in humans that are extensively present in the body. They are characterized by cells embedded in an extracellular matrix (ECM) composed of a ground substance and three main types of protein fibers— collagen, elastic, and reticular fibers. The ground substance of connective tissues can range from a watery and jelly-like consistency to mineralized and hard. The wide variety of cells in the connective tissues include fibroblasts,...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Connective Tissue Cell Types01:22

Connective Tissue Cell Types

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Connective tissue develops from the mesoderm of a developing embryo and consists of cells, fibers, and ground substance: a gel-like material containing large complexes of carbohydrates and proteins. Connective tissue was first identified as a separate tissue family in the 18th century, and Johannes Peter Muller coined the term connective tissue.
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T Cell Types and Functions01:24

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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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...
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Autoimmune Disorders01:29

Autoimmune Disorders

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
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Updated: May 3, 2026

Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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Connective tissue diseases: systemic sclerosis: beyond limited and diffuse subsets?

John Varga1, Monique Hinchcliff1

  • 1Feinberg School of Medicine, Division of Rheumatology and Northwestern Scleroderma Program Northwestern University, 240 East Huron Street, Chicago, IL 60657, USA.

Nature Reviews. Rheumatology
|February 19, 2014
PubMed
Summary
This summary is machine-generated.

Systemic sclerosis patients may represent a distinct subset when they also exhibit features of other connective tissue diseases. This categorization can improve disease management and patient outcomes.

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Area of Science:

  • Rheumatology
  • Immunology
  • Internal Medicine

Background:

  • Systemic sclerosis (SSc) presents with heterogeneous clinical manifestations, therapeutic responses, and prognoses.
  • Effective patient stratification is crucial for optimizing management strategies in SSc.

Purpose of the Study:

  • To investigate whether SSc patients with overlapping features of other connective tissue diseases (CTDs) constitute a unique clinical subset.
  • To explore the potential for improved disease classification and management through subset identification.

Main Methods:

  • Retrospective analysis of patient data.
  • Clinical feature assessment for SSc and overlapping CTDs.
  • Statistical analysis to identify distinct patient groups.

Main Results:

  • Preliminary findings suggest that patients with overlapping CTD features exhibit distinct clinical patterns.
  • Identification of specific overlapping features associated with a potential SSc subset.

Conclusions:

  • Patients with systemic sclerosis and overlapping connective tissue disease features may represent a distinct disease subset.
  • Further research is warranted to validate this subset and its clinical implications for targeted therapies and improved patient outcomes.