Podcast
Questions and Answers
Which of the following is the most common subepidermal autoimmune blistering disease?
Which of the following is the most common subepidermal autoimmune blistering disease?
- Bullous pemphigoid (correct)
- Epidermolysis bullosa acquisita
- Pemphigoid gestationis
- Linear IgA disease
Which antibody is considered to be pathogenic in bullous pemphigoid?
Which antibody is considered to be pathogenic in bullous pemphigoid?
- Antibodies to BP230/BPAG1
- Antibodies to type IV collagen
- IgG antibodies to BP180/BPAG2/type XVII collagen (correct)
- IgA antibodies
What is the typical age demographic affected by bullous pemphigoid?
What is the typical age demographic affected by bullous pemphigoid?
- Children under 10 years of age
- Young adults between 20-30 years of age
- Individuals with a family history of the condition
- Older adults, typically over 60 years of age (correct)
Which of the following is a common clinical presentation of non-bullous bullous pemphigoid?
Which of the following is a common clinical presentation of non-bullous bullous pemphigoid?
What is a typical characteristic of the bullae in the classic presentation of bullous pemphigoid?
What is a typical characteristic of the bullae in the classic presentation of bullous pemphigoid?
What is a common symptom associated with bullous pemphigoid?
What is a common symptom associated with bullous pemphigoid?
When does pemphigoid gestationis typically begin during pregnancy?
When does pemphigoid gestationis typically begin during pregnancy?
Which of the following is considered a standard initial therapy for moderate to severe Pemphigus vulgaris?
Which of the following is considered a standard initial therapy for moderate to severe Pemphigus vulgaris?
Besides pregnancy, what other factors can cause a flare-up of pemphigoid gestationis?
Besides pregnancy, what other factors can cause a flare-up of pemphigoid gestationis?
What is the primary role of oral immunosuppressants in the treatment of Pemphigus vulgaris?
What is the primary role of oral immunosuppressants in the treatment of Pemphigus vulgaris?
What was the life expectancy of a patient with Pemphigus Vulgaris before prednisone treatment was available?
What was the life expectancy of a patient with Pemphigus Vulgaris before prednisone treatment was available?
Which of these is NOT classified as a subtype of pemphigus?
Which of these is NOT classified as a subtype of pemphigus?
What is the primary enzyme associated with Dermatitis Herpetiformis (DH)?
What is the primary enzyme associated with Dermatitis Herpetiformis (DH)?
What percentage of patients treated with Rituximab achieve remission off steroids after 2 years of treatment?
What percentage of patients treated with Rituximab achieve remission off steroids after 2 years of treatment?
Which of the following is the most common presenting symptom in patients newly diagnosed with DH?
Which of the following is the most common presenting symptom in patients newly diagnosed with DH?
What is the typical distribution pattern of skin lesions in Dermatitis Herpetiformis (DH)?
What is the typical distribution pattern of skin lesions in Dermatitis Herpetiformis (DH)?
Which of the following is considered a very long-term side effect of Oral steroid use?
Which of the following is considered a very long-term side effect of Oral steroid use?
What is the most direct treatment for patients with pemphigus that are only showing minimal symptoms?
What is the most direct treatment for patients with pemphigus that are only showing minimal symptoms?
Which blood test is most specific for diagnosing DH?
Which blood test is most specific for diagnosing DH?
Which is most associated with Pemphigus Vulgaris?
Which is most associated with Pemphigus Vulgaris?
What is the primary treatment for the underlying cause of Dermatitis Herpetiformis (DH)?
What is the primary treatment for the underlying cause of Dermatitis Herpetiformis (DH)?
Which medication provides rapid relief from pruritus associated with Dermatitis Herpetiformis (DH)?
Which medication provides rapid relief from pruritus associated with Dermatitis Herpetiformis (DH)?
What is a crucial prerequisite to assess before beginning treatment with dapsone for Dermatitis Herpetiformis?
What is a crucial prerequisite to assess before beginning treatment with dapsone for Dermatitis Herpetiformis?
What best describes the nature of intestinal symptoms in Dermatitis Herpetiformis (DH)?
What best describes the nature of intestinal symptoms in Dermatitis Herpetiformis (DH)?
Which of the following is the most common variant of pemphigus?
Which of the following is the most common variant of pemphigus?
Pemphigus vulgaris is characterized by autoantibodies targeting which of the following?
Pemphigus vulgaris is characterized by autoantibodies targeting which of the following?
Which of the following is a typical clinical presentation of pemphigus vulgaris?
Which of the following is a typical clinical presentation of pemphigus vulgaris?
Which of the following is the most appropriate medium to send a biopsy for direct immunofluorescence in the diagnosis of pemphigus?
Which of the following is the most appropriate medium to send a biopsy for direct immunofluorescence in the diagnosis of pemphigus?
Which of the following serological tests is highly sensitive and specific for circulating desmoglein 3 antibodies, often used in the diagnosis of pemphigus vulgaris?
Which of the following serological tests is highly sensitive and specific for circulating desmoglein 3 antibodies, often used in the diagnosis of pemphigus vulgaris?
Which of the following is a medication that is more likely to induce pemphigus foliaceus?
Which of the following is a medication that is more likely to induce pemphigus foliaceus?
Which of the following best describes the demographic at highest risk of developing pemphigus vulgaris?
Which of the following best describes the demographic at highest risk of developing pemphigus vulgaris?
Which of the following statements regarding skin findings in pemphigus vulgaris is correct?
Which of the following statements regarding skin findings in pemphigus vulgaris is correct?
A mother with bullous pemphigoid may have an increased risk for which of the following conditions?
A mother with bullous pemphigoid may have an increased risk for which of the following conditions?
Which of the following is a common medication associated with bullous pemphigoid?
Which of the following is a common medication associated with bullous pemphigoid?
What is the preferred medium to transport a skin biopsy for direct immunofluorescence (DIF) in the diagnosis of bullous pemphigoid?
What is the preferred medium to transport a skin biopsy for direct immunofluorescence (DIF) in the diagnosis of bullous pemphigoid?
Which of the following statements about ELISA testing for bullous pemphigoid is correct?
Which of the following statements about ELISA testing for bullous pemphigoid is correct?
For mild and localized bullous pemphigoid, what is generally considered the first-line treatment?
For mild and localized bullous pemphigoid, what is generally considered the first-line treatment?
What is a common risk factor for relapse of bullous pemphigoid after cessation of treatment?
What is a common risk factor for relapse of bullous pemphigoid after cessation of treatment?
Which of the following best describes the typical course of bullous pemphigoid?
Which of the following best describes the typical course of bullous pemphigoid?
Dermatitis herpetiformis is associated with which underlying condition?
Dermatitis herpetiformis is associated with which underlying condition?
Flashcards
Bullous Pemphigoid
Bullous Pemphigoid
A common subepidermal blistering disease affecting older adults and is frequently associated with neurological issues.
What are the primary target antigens in Bullous Pemphigoid?
What are the primary target antigens in Bullous Pemphigoid?
Autoantibodies mainly against BP180 and BP230 are characteristic of this disease.
Pemphigoid Gestationis
Pemphigoid Gestationis
A blistering disease affecting pregnant women, often starting during the second trimester.
What are the clinical features of Pemphigoid Gestationis?
What are the clinical features of Pemphigoid Gestationis?
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Which antibody is primarily responsible for the pathogenesis of Bullous Pemphigoid?
Which antibody is primarily responsible for the pathogenesis of Bullous Pemphigoid?
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Can Bullous Pemphigoid be medication-induced?
Can Bullous Pemphigoid be medication-induced?
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Which HLA allele is associated with Bullous Pemphigoid?
Which HLA allele is associated with Bullous Pemphigoid?
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Describe the classic presentation of Bullous Pemphigoid.
Describe the classic presentation of Bullous Pemphigoid.
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Pemphigus Vulgaris
Pemphigus Vulgaris
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Nikolsky's Sign
Nikolsky's Sign
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Asboe-Hansen Sign
Asboe-Hansen Sign
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Indirect Immunofluorescence (IIF)
Indirect Immunofluorescence (IIF)
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ELISA (Enzyme-linked Immunosorbent Assay)
ELISA (Enzyme-linked Immunosorbent Assay)
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Biopsy
Biopsy
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Direct Immunofluorescence (DIF)
Direct Immunofluorescence (DIF)
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Pemphigus Foliaceus
Pemphigus Foliaceus
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What is the cause of Bullous Pemphigoid?
What is the cause of Bullous Pemphigoid?
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What are the clinical features of Bullous Pemphigoid?
What are the clinical features of Bullous Pemphigoid?
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What is H&E biopsy in Bullous Pemphigoid diagnosis?
What is H&E biopsy in Bullous Pemphigoid diagnosis?
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What is Indirect Immunofluorescence (IIF)?
What is Indirect Immunofluorescence (IIF)?
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What is the first-line treatment for mild to moderate Bullous Pemphigoid?
What is the first-line treatment for mild to moderate Bullous Pemphigoid?
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What are second-line treatments for Bullous Pemphigoid?
What are second-line treatments for Bullous Pemphigoid?
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Dermatitis Herpetiformis
Dermatitis Herpetiformis
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IgA anti-endomysial antibodies
IgA anti-endomysial antibodies
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IgA anti-tissue transglutaminase 2 antibodies
IgA anti-tissue transglutaminase 2 antibodies
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IgA anti-tissue transglutaminase 3 antibodies
IgA anti-tissue transglutaminase 3 antibodies
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Dapsone
Dapsone
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Gluten-free diet
Gluten-free diet
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Skin biopsy with direct immunofluorescence
Skin biopsy with direct immunofluorescence
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Extensor surfaces of the body
Extensor surfaces of the body
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Pemphigus Vulgaris Treatment: Initial Therapy
Pemphigus Vulgaris Treatment: Initial Therapy
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Pemphigus Vulgaris Treatment: Long-Term Management
Pemphigus Vulgaris Treatment: Long-Term Management
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Pemphigus Vulgaris Treatment: Rituximab
Pemphigus Vulgaris Treatment: Rituximab
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Pemphigus Vulgaris Prognosis: Impact of Treatment
Pemphigus Vulgaris Prognosis: Impact of Treatment
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Types of Pemphigus: Classification
Types of Pemphigus: Classification
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Pemphigus Vegetans
Pemphigus Vegetans
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Fogo Selvagem
Fogo Selvagem
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Study Notes
Vesiculobullous Disorders
- Vesiculobullous disorders are a group of skin conditions characterized by blisters.
- Adherens junctions and desmosomes are cell-to-cell junctions, important for skin integrity. Desmosomes use keratin, cadherin, plakoglobin, desmoglein, desmocollin, plakophilin, and desmoplakin.
- Pemphigus is an autoimmune blistering disease. Different types exist, including vulgaris, vegetans, foliaceus, erythematosus, fogo selvagem, drug-induced, paraneoplastic, and IgA pemphigus.
- Pemphigus vulgaris is the most common type. It is an autoimmune blistering disease with antibodies directed toward desmoglein 3. Older adults (50-60s) are affected, with a 10-fold increased risk in individuals of Jewish ancestry. Symptoms include painful oral and/or other mucosal sites, potentially life-threatening.
- Pemphigus vulgaris diagnosis involves biopsy (H&E and DIF), and blood tests (IIF and ELISA). ELISA is highly sensitive and specific for desmoglein 3 antibodies.
Classification of Pemphigus
- Pemphigus vulgaris
- Pemphigus vegetans
- Pemphigus foliaceus
- Pemphigus erythematosus
- Fogo selvagem
- Drug-induced pemphigus
- Paraneoplastic pemphigus
- IgA pemphigus
Pemphigus Vulgaris - Clinical
- Characterized by painful oral and other mucosal erosions, sometimes with flaccid skin blisters.
- Mucosal erosions are irregular, and painful. Oral, esophageal, conjunctival, vaginal, penile, and anal mucosa can be involved.
- Skin blisters are easily ruptured and heal slowly, or not at all.
- Nikolsky and Asboe-Hansen signs are often present.
- Secondary infections (e.g., HSV, staph, strep) are common.
- Non-scarring lesions are a hallmark.
Pemphigus Vulgaris - Diagnosis
- Diagnosis requires biopsy (H&E and DIF).
- Indirect immunofluorescence (IIF) and enzyme-linked immunosorbent assay (ELISA) on blood are used. IIF uses monkey esophagus, ELISA tests for desmoglein 3 antibodies. Antibody levels can predict disease activity.
Pemphigus Vulgaris - Treatment
- Prednisone is a cornerstone treatment.
- Immunosuppressants (e.g., mycophenolate, azathioprine, cyclophosphamide) can also be used.
- Rituximab is sometimes used, particularly in severe cases.
- Initial treatment varies from mild to moderate or severe pemphigus. Often includes oral steroids and, potentially, rituximab. Disease control can lead to tapering doses. Relapses may require increasing doses or additional treatment.
- Prognosis is influenced by steroid use before treatment. Without treatment, life expectancy was limited.
Subpidermal Bullous Diseases
- Includes bullous pemphigoid, pemphigoid gestationis, cicatricial pemphigoid, linear IgA disease, chronic bullous disease of childhood, dermatitis herpetiformis, bullous lupus, and epidermolysis bullosa acquisita.
- Bullous pemphigoid is the most common subepidermal autoimmune blistering disorder. It impacts older adults (age > 60).
- Characteristics include non-bullous or bullous presentation. Pruritus, excoriations, eczematous, papular or urticarial form are symptoms. Tense blisters on normal or erythematous skin. Oral involvement is present in about 10–30% of patients. Associated with peripheral eosinophilia.
- Diagnosis involves blood tests (ELISA, IIF) and biopsy (H&E and DIF). Topical or oral steroids, immunosuppressants, IVIg, or rituximab are treatment options.
Pemphigoid Gestationis
- Also known as "Herpes Gestationis."
- Starts during the second trimester of pregnancy. Often flares at delivery.
- Recurs during future pregnancies and periods of menstruation.
- Symptoms include pruritic, urticarial plaques and tense bullae, starting around the umbilicus and spreading.
- Risk to the baby includes prematurity or small size at birth.
- Maternal complications include an increased risk of Graves disease. There is a 10% risk to the infant of skin disease, but it usually resolves spontaneously.
Dermatitis Herpetiformis
- Cutaneous manifestation of celiac disease.
- Associated with northern European heritage and a mean age of around 40 years.
- Strong association with HLA-DQ2 (and celiac disease) and thyroid disorders (particularly Hashimoto thyroiditis)
- Characterized by symmetric grouped or herpetiform papulovesicles on an inflamed base, along with urticarial plaques and papules/vesicles.
- Areas affected include elbows, knees, extensor forearms, back, and buttocks. Severe pruritus (itching) is common. Lesions often rupture or erode, leaving crusted areas.
- Diagnosis requires biopsy (H&E and DIF) and blood tests (total serum IgA, IgA anti-endomysial, and anti-tissue transglutaminase antibodies).
- Treatment focuses on a gluten-free diet, supplemented by dapsone, a medication for quick relief of pruritus. No effect on intestinal disease, but lesions return within 24-48 hours of stopping if the patient continues to eat gluten.
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