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Case-based MCQ 🔸
#MCQ_34
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The correct answer is A.
AIDS-related Kaposi sarcoma (KS) is a vascular tumor due to coinfection with HIV and human herpesvirus 8 and is considered an AIDS-defining illness. KS occurs most commonly in patients with CD4 counts <200 cells/ µL. Commonly involved areas include the skin, oral cavity, gastrointestinal tract, and lung. Cutaneous KS most often appears on the lower extremities, genitalia, and face. The lesions are typically painless elliptical papules of various colors (e.g., brown, red, purple) arranged in a linear fashion along with skin tension areas. However, early KS can appear similar to purpura, angiomas, hematomas, nevi, or dermatofibromas. Some patients may also have lymphedema due to obstruction of lymphatics by associated lymphadenopathy.
❌Choice B is not correct:
Herpes zoster is due to varicella-zoster virus and typically presents as discrete grouped papules or plaques that eventually become vesicles in a dermatomal distribution.
❌Choice C is not correct:
Psoriasis is typically characterized by sharply demarcated, raised, erythematous plaques with an overlying silvery scale on the extensor surfaces (e.g., elbows and knees, hands, feet, trunk).
❌Choice D is not correct:
Seborrheic dermatitis usually presents as pruritic, erythematous plaques with fine, greasy scales. Lesions typically occur on the face (e.g., eyebrows, nasolabial folds), scalp, and chest.
❌Choice E is not correct:
Subcutaneous lipoma forms a benign, solitary, painless, and mobile subcutaneous nodule. Commonly affected areas include the neck, trunk, and extremities.
✅Summarized Points:
AIDS-related cutaneous Kaposi sarcoma typically presents as painless elliptical papules of various colors arranged in a linear fashion along with skin tension areas. However, early lesions can appear similar to purpura, angiomas, hematomas, nevi, or dermatofibromas.Mostrar más ...