Psoriasis
Psoriasis ( 40 Questions)
Skin patch testing for allergens: Patch testing is used to diagnose allergic contact dermatitis, not psoriasis.
Chest X-ray to assess lung involvement: Chest X-rays are not necessary for the diagnosis of psoriasis, as it primarily affects the skin and joints, not the lungs.
Complete blood count (CBC) to assess white blood cell count: While a CBC may be performed to assess inflammation, it is not specific to psoriasis and cannot confirm the diagnosis. A skin biopsy is needed for definitive diagnosis.
A skin biopsy is commonly performed to confirm the diagnosis of psoriasis. It involves taking a small sample of skin tissue from a psoriatic plaque and examining it under a microscope to identify the characteristic histological changes, such as hyperkeratosis, parakeratosis, and elongation of the rete ridges.
Explanation: A skin biopsy is commonly performed to confirm the diagnosis of psoriasis. It involves taking a small sample of skin tissue from a psoriatic plaque and examining it under a microscope to identify the characteristic histological changes, such as hyperkeratosis, parakeratosis, and elongation of the rete ridges.
Incorrect choices: a. Skin patch testing for allergens: Patch testing is used to diagnose allergic contact dermatitis, not psoriasis.
b. Chest X-ray to assess lung involvement: Chest X-rays are not necessary for the diagnosis of psoriasis, as it primarily affects the skin and joints, not the lungs.
c. Complete blood count (CBC) to assess white blood cell count: While a CBC may be performed to assess inflammation, it is not specific to psoriasis and cannot confirm the diagnosis. A skin biopsy is needed for definitive diagnosis.