Which of the following statements is true regarding the distribution of psoriasis lesions on the body?
Psoriasis lesions are evenly distributed across the body.
Psoriasis lesions are typically limited to the face and neck.
Psoriasis lesions are more commonly found on the left side of the body.
Psoriasis lesions are often symmetrical, affecting corresponding areas on both sides of the body.
The Correct Answer is D
Explanation: Psoriasis lesions commonly appear in a symmetrical pattern, affecting similar areas on both sides of the body. For example, if a plaque is present on the right elbow, there is a high likelihood of a corresponding plaque on the left elbow.
Incorrect choices: a. Psoriasis lesions are evenly distributed across the body: Psoriasis lesions are not evenly distributed and tend to cluster in certain areas, such as elbows, knees, scalp, and lower back.
b. Psoriasis lesions are typically limited to the face and neck: While psoriasis can occur on the face and neck, it is more commonly found on extensor surfaces (elbows and knees) and the scalp.
c. Psoriasis lesions are more commonly found on the left side of the body: There is no evidence to support a preference for the left side of the body in psoriasis distribution. The symmetrical pattern is a more characteristic feature.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Explanation: Auspitz sign is a characteristic finding in psoriasis where pinpoint bleeding occurs when scales on the skin are removed. It is caused by the rapid growth and shedding of skin cells, which leads to the formation of delicate blood vessels that bleed easily.
Incorrect choices: a. Auspitz sign is not related to increased bleeding tendency in the patient; it is specific to psoriasis and its characteristic skin changes.
b. Presence of skin pustules and blisters is not associated with Auspitz sign and may indicate other skin conditions.
c. Formation of deep fissures in the skin is not directly related to Auspitz sign, which focuses on the bleeding after scale removal.
Correct Answer is C
Explanation
Explanation: Genetic predisposition in psoriasis contributes to the development of the condition by causing abnormal functioning of the immune system. Certain genes involved in the immune response are associated with psoriasis, leading to an overactive immune system that triggers inflammation and skin cell overproduction.
Incorrect choices: a. Genetic factors increase skin sensitivity to environmental irritants: While some environmental triggers can worsen psoriasis symptoms, genetic predisposition primarily influences the immune system's response, not skin sensitivity to irritants.
b. Genetic factors cause an allergic reaction to certain foods: Psoriasis is not primarily an allergic reaction, and genetic factors do not cause allergic reactions to specific foods in this context.
d. Genetic factors impair the skin's barrier function: Psoriasis is not caused by a skin barrier dysfunction. The condition is characterized by immune system dysregulation and the subsequent inflammation and rapid skin cell turnover.
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