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Related Concept Videos

Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

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Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
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Mitral Regurgitation II: Clinical Features and Diagnostic Tests01:23

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Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
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Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

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IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
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Thoracic Aorta01:15

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The thoracic section of the aorta begins at the T5 vertebra and extends to the T12 level at the diaphragm, initially progressing through the mediastinum to the left of the spinal column. Throughout its course in the thoracic segment, the thoracic aorta emits various offshoots known collectively as visceral and parietal branches. The branches that predominantly supply blood to visceral organs are termed visceral branches and include bronchial, pericardial, esophageal, and mediastinal arteries,...
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Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
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Muir-Torre Syndrome.

A Caresse Gamret1, Kyle D Klingbeil2, Raymond M Fertig3

  • 1Dr. Philip Frost, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL; acgamret@gmail.com.

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Summary
This summary is machine-generated.

Muir-Torre syndrome (MTS) is a rare genetic disorder characterized by sebaceous gland tumors and visceral malignancies. This case highlights a patient with multiple skin cancers and a significant family history of various cancers, underscoring the importance of genetic counseling.

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Area of Science:

  • Oncology
  • Dermatology
  • Genetics

Background:

  • Muir-Torre syndrome (MTS) is an autosomal dominant disorder associated with an increased risk of sebaceous neoplasms and visceral malignancies, particularly colorectal, genitourinary, and breast cancers.
  • The syndrome is typically caused by mutations in DNA mismatch repair (MMR) genes, leading to microsatellite instability and a predisposition to cancer.
  • A strong family history of cancer is a key indicator for suspecting hereditary cancer syndromes like MTS.

Observation:

  • A 64-year-old male diagnosed with MTS presented with a history of multiple sebaceous carcinomas and adenomas.
  • He had a history of colon cancer (resection 17 years prior) and recently diagnosed urothelial carcinoma.
  • The patient exhibited an extensive family history of various cancers, including colon, lung, bone, kidney, skin, and testicular cancers, with consanguineous parents.

Findings:

  • The patient's family pedigree revealed a high prevalence of cancers across multiple generations and lineages.
  • The affected family members had a spectrum of malignancies, consistent with Lynch syndrome-related cancers, often seen in MTS.
  • The consanguinity in the parents may increase the risk of autosomal recessive conditions or compound heterozygosity, though MTS is typically autosomal dominant.

Implications:

  • This case underscores the critical role of comprehensive family cancer history assessment and genetic counseling in patients with sebaceous neoplasms.
  • Early diagnosis and genetic testing for DNA mismatch repair gene mutations are crucial for Lynch syndrome/MTS patients.
  • Proactive surveillance protocols for both cutaneous and visceral malignancies are essential for affected individuals and their at-risk relatives.