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Related Concept Videos

Skin Diseases and Disorders01:23

Skin 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...
Inflammatory Bowel Disease IV: Clinical Manifestations01:20

Inflammatory Bowel Disease IV: Clinical Manifestations

Inflammatory bowel disease (IBD) encompasses two major chronic disorders—ulcerative colitis and Crohn’s disease—each characterized by relapsing episodes of gastrointestinal inflammation. Although they share certain clinical features, their patterns of involvement and manifestations differ in ways that aid diagnosis and guide management.Ulcerative ColitisUlcerative colitis is limited to the colon and rectum and involves continuous inflammation of the mucosal layer. The disease course is marked...
Gastritis III: Clinical Manifestations and Management01:23

Gastritis III: Clinical Manifestations and Management

The clinical manifestations of gastritis can vary depending on the cause and type of gastritis, but some common symptoms may include the following.
Clinical manifestations of acute gastritis
The patient with acute gastritis may have a rapid onset of symptoms, such as epigastric pain or discomfort, dyspepsia, anorexia, hiccups, or nausea and vomiting, which can last from a few hours to a few days. Erosive or hemorrhagic gastritis may cause bleeding, which may manifest as blood in vomit or as...
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
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Updated: May 26, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
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[Shiitake dermatitis in a Spanish patient].

Alicia Lapresta, Rebeca de Miguel, Ana Isabel Sánchez-Moya

    Dermatology Online Journal
    |January 12, 2012
    PubMed
    Summary

    Shiitake dermatitis is a skin reaction caused by eating raw or undercooked shiitake mushrooms. This case report details a patient who developed a widespread itchy rash after consuming these fungi.

    Area of Science:

    • Dermatology
    • Toxicology
    • Mycology

    Background:

    • Shiitake dermatitis is a rare toxicodermia.
    • It is triggered by the ingestion of raw or undercooked shiitake mushrooms (Lentinula edodes).
    • The condition presents as a distinctive eruption.

    Observation:

    • A Spanish patient presented to the emergency room with a pruritic, dermatographic eruption.
    • The rash predominantly affected the trunk and neck regions.
    • The onset of symptoms occurred a few days after shiitake mushroom consumption.

    Findings:

    • The patient's clinical presentation was consistent with shiitake dermatitis.
    • Diagnosis was based on clinical history and characteristic eruption.
    • No specific laboratory tests were mentioned in this context.

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    Published on: December 15, 2011

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    Implications:

    • This case highlights the importance of recognizing shiitake dermatitis in clinical practice.
    • Educating the public about safe mushroom consumption is crucial.
    • Prompt diagnosis and management can alleviate patient discomfort and prevent misdiagnosis.