Arterial fibrodysplasia. Histopathologic character and current etiologic concepts

Insights

Arterial fibrodysplasia, a vascular disease, affects numerous arteries, particularly renal arteries. This study identifies a new form of perimedial dysplasia and discusses potential causes like hormonal influences.

Area of Science:

  • Vascular Medicine
  • Pathology
  • Genetics

Background:

  • Arterial fibrodysplasia (AFD) is a non-atherosclerotic vascular disease.
  • It affects various arteries, with renal artery involvement being common.
  • Existing classifications include intimal fibroplasia and medial hyperplasia, with medical fibroplasia representing a disease continuum.

Purpose of the Study:

  • To characterize the spectrum of arterial fibrodysplasia.
  • To identify and describe a previously unrecognized form of perimedial dysplasia.
  • To explore potential contributing factors to AFD development.

Main Methods:

  • Retrospective analysis of 196 patients with arterial fibrodysplasia.
  • Detailed pathological examination of 316 affected vessels.
  • Histological assessment to identify distinct pathological entities.

Main Results:

  • Arterial fibrodysplasia affected 196 patients (172 females, 24 males) with 316 diseased vessels.
  • Renal artery lesions were most frequent (152 adults, 25 pediatric).
  • A novel form of perimedial dysplasia, marked by peripheral medial elastic tissue accumulation, was identified.

Conclusions:

  • Medical fibroplasia encompasses a range of pathological processes.
  • A distinct entity of perimedial dysplasia is recognized.
  • Hormonal influences, mechanical stresses, and vasa vasorum patterns may predispose individuals to arterial fibrodysplasia.

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...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Atherosclerosis I: Introduction01:30

Atherosclerosis I: Introduction

Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
Peripheral Artery Disease I: Introduction01:30

Peripheral Artery Disease I: Introduction

Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
Aneurysm I: Introduction01:30

Aneurysm I: Introduction

An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...