Which of the following skin features is commonly observed in psoriasis that aids in its diagnosis?

Explanation: Psoriasis is an autoimmune disorder characterized by an overactive immune system. In psoriasis, the immune system mistakenly triggers inflammation, leading to the rapid growth of skin cells and the formation of plaques.

Incorrect choices: a. Immune system suppresses inflammation and skin cell proliferation: This statement is incorrect. In psoriasis, the immune system does not suppress inflammation but rather promotes it.

b. Immune system responds normally to environmental triggers: This statement is incorrect. In psoriasis, the immune system's response to triggers is abnormal, leading to the characteristic inflammation and skin cell overgrowth.

d. Immune system functions independently of psoriasis development: This statement is incorrect. The immune system plays a central role in psoriasis etiology. The abnormal immune response is the driving force behind the development and progression of psoriasis.

Explanation: The primary assessment technique used to diagnose psoriasis is a physical examination of the skin. The characteristic red, raised patches with silver scales are indicative of psoriasis. While additional tests like skin biopsy may be used to confirm the diagnosis, the initial diagnosis is based on the visual appearance of the skin lesions.

Incorrect choices: a. A skin biopsy may be performed to confirm the diagnosis of psoriasis, but it is not the primary assessment technique used to diagnose the condition.

b. Blood tests may be conducted to rule out other conditions or assess for systemic involvement, but they are not the primary method of diagnosing psoriasis.

d. MRI is not a diagnostic tool for psoriasis. It may be used in certain cases to assess joint involvement in psoriatic arthritis, but it does not diagnose psoriasis itself.