Contact dermatitis
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Summary of Contact dermatitis
Contact dermatitis is a type IV (delayed) hypersensitivity reaction resulting in an erythematous, pruritic, oozing, vesicular skin rash. It results from either exposure to allergens (allergic contact dermatitis) such as poison ivy or irritants (irritant contact dermatitis) such as detergents.
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Pathology
Immune system
General infections
Hypersensitivity reactions
Type I hypersensitivity
Food allergy
Anaphylaxis
Asthma
Type II hypersensitivity
Immune thrombocytopenic purpura
Autoimmune hemolytic anemia
Hemolytic disease of the newborn
Rheumatic heart disease
Myasthenia gravis
Graves disease
Pemphigus vulgaris
Type III hypersensitivity
Serum sickness
Systemic lupus erythematosus
Poststreptococcal glomerulonephritis
Type IV hypersensitivity
Graft-versus-host disease
Contact dermatitis
Transplants
Immunodeficiences
X-linked agammaglobulinemia
Selective immunoglobulin A deficiency
Common variable immunodeficiency
IgG subclass deficiency
Hyperimmunoglobulin E syndrome
Isolated primary immunoglobulin M deficiency
Thymic aplasia
DiGeorge syndrome
Severe combined immunodeficiency
Adenosine deaminase deficiency
Ataxia-telangiectasia
Hyper IgM syndrome
Wiskott-Aldrich syndrome
Leukocyte adhesion deficiency
Chediak-Higashi syndrome
Chronic granulomatous disease
Complement deficiency
Hereditary angioedema
Asplenia
Immune system organ disorders
Immune system pathology review
AssessmentsContact dermatitis
Contact dermatitis
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Flashcards
Contact dermatitis
9 flashcards
Questions
USMLE® Step 1 style questions USMLE
7 questions
USMLE® Step 2 style questions USMLE
8 questions
Preview
A 17-year-old man comes to the clinic with a pruritic rash.He says that he noticed a vesicular rash on his arm after walking in the forest with his friends. His temperature is 37.1 oC, pulse is 80 /min, respiratory rate is 12/min, and blood pressure is 110/75 mmHg. Physical examination shows clear fluid filled vesicles on his arm in a linear pattern. He does not have stridor and air entry is good bilaterally. He is up-to-date on his immunizations and does not have any allergies. He does not smoke and does not drink alcohol. Which of the following is the most likely explanation for this patient's physical findings?
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