The nurse is providing education to a patient with psoriasis about potential triggers that can worsen the condition. Which statement by the patient indicates a need for further education?

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.

Explanation: Psoriasis commonly affects the scalp, leading to the formation of red, scaly patches on the scalp's surface. It can also extend to the hairline and behind the ears.

Incorrect choices: b. Soles of the feet - Psoriasis can affect the soles of the feet, but it is less common than scalp involvement.

c. Abdomen - Psoriasis can occur on the abdomen, but it is not as frequently affected as the scalp.

d. Neck - Psoriasis can involve the neck area, but it is not the most common site of involvement.