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Questions and Answers
Which condition presents with both papules and scales, and is commonly associated with rapid turnover of keratinocytes?
Which condition presents with both papules and scales, and is commonly associated with rapid turnover of keratinocytes?
- Lichen planus
- Pityriasis rosea
- Vitiligo
- Psoriasis (correct)
Which autoimmune disease primarily targets keratinocytes?
Which autoimmune disease primarily targets keratinocytes?
- Lichen planus
- Vitiligo
- Psoriasis (correct)
- Pityriasis rosea
Which phenomenon is specific for psoriasis, characterized by bleeding when scales are removed?
Which phenomenon is specific for psoriasis, characterized by bleeding when scales are removed?
- Auspitz sign (correct)
- Palmoplantar psoriasis
- Guttate psoriasis
- Koebner's phenomenon
In which area of the body is psoriasis most commonly found?
In which area of the body is psoriasis most commonly found?
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Which condition commonly appears at the site of trauma and is associated with streptococcus infection in children?
Which condition commonly appears at the site of trauma and is associated with streptococcus infection in children?
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Study Notes
Psoriasis
- Characterized by both papules and scales with a rapid turnover of keratinocytes.
- Commonly manifests on the elbows, knees, scalp, and lower back.
- Specific phenomenon known as Auspitz's sign, where pinpoint bleeding occurs upon removal of scales.
Autoimmune Skin Conditions
- Autoimmune disease that primarily targets keratinocytes is pemphigus vulgaris.
- Pemphigus vulgaris presents with blistering and erosive lesions, affecting the integrity of the skin.
Reactive Conditions
- Condition associated with trauma and linked to streptococcus infection, particularly in children, is guttate psoriasis.
- Guttate psoriasis often triggers after streptococcal throat infections, presenting as drop-shaped lesions on the body.
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