Related Experiment Video
Updated: May 20, 2026
09:02
Percutaneous Hepatic Perfusion (PHP) with Melphalan as a Treatment for Unresectable Metastases Confined to the Liver
Published on: July 31, 2016
[Hepatic porphyrias with cutaneous symptoms]
Duodecim; Laaketieteellinen Aikakauskirja
|July 25, 2012
Summary
Hepatic porphyrias cause skin issues like blistering and scarring due to sun exposure. Differentiating between variegate porphyria and porphyria cutanea tarda is crucial for effective treatment.
Area of Science:
- Biochemistry
- Dermatology
- Genetics
Context:
- Cutaneous symptoms in hepatic porphyrias arise from phototoxic reactions.
- Sunlight exposure triggers circulating porphyrins in dermal vascular walls, leading to skin fragility, blistering, and scarring.
- Approximately 200 patients in Finland are affected by hepatic porphyrias with cutaneous symptoms.
Purpose:
- To highlight the clinical presentation and diagnostic challenges of hepatic porphyrias with cutaneous symptoms.
- To differentiate between variegate porphyria and porphyria cutanea tarda, as only the latter has an effective treatment.
- To emphasize the importance of differential diagnosis due to the potential for acute episodes in variegate porphyria.
Summary:
- Hepatic porphyrias manifest with cutaneous symptoms initiated by phototoxic reactions.
- These reactions, caused by circulating porphyrins and sunlight, result in skin fragility, blistering, and scarring in sun-exposed areas.
- Variegate porphyria and porphyria cutanea tarda share indistinguishable cutaneous symptoms, necessitating careful differential diagnosis for appropriate management.
Impact:
- Accurate diagnosis is vital for initiating effective treatment, particularly for porphyria cutanea tarda.
- Distinguishing between variegate porphyria and porphyria cutanea tarda prevents misdiagnosis and ensures timely intervention for acute episodes.
- Improved understanding aids in managing patients with hepatic porphyrias and associated cutaneous manifestations.
More Related Videos
10:40Visualization and Analysis of Blood Flow and Oxygen Consumption in Hepatic Microcirculation: Application to an Acute Hepatitis Model
Published on: August 4, 2012
11:36Induction of Drug-Induced, Autoimmune Hepatitis in BALB/c Mice for the Study of Its Pathogenic Mechanisms
Published on: May 29, 2020
Related Concept Videos
01:23Cirrhosis I: Introduction
Cirrhosis is a chronic, irreversible liver disease characterized by the widespread replacement of healthy liver tissue with fibrotic scar tissue and the formation of regenerative nodules.Etiology of cirrhosisCirrhosis results from sustained liver injury that triggers progressive fibrosis and structural remodeling. The underlying causes are diverse, encompassing common and less frequent clinical conditions. Regardless of the origin, all causes lead to chronic inflammation, hepatocyte loss, and...
01:22Portal Hypertension
Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
01:24Cirrhosis II: Pathophysiology
Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...
01:25Jaundice
Jaundice, or icterus, is the yellow discoloration of the skin, sclerae, and mucous membranes. It happens when plasma bilirubin levels rise above 2.5-3 mg/dL, leading to bilirubin deposition in tissue.Bilirubin is a byproduct of hemoglobin degradation. In macrophages, hemoglobin breaks down into globin and heme. Globin is converted into amino acids, while heme is turned into biliverdin by heme oxygenase, which is then reduced to unconjugated bilirubin by biliverdin reductase.Unconjugated...
01:23Skin Diseases and Disorders
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
01:22Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test
In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...