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What term describes a pattern of redness and telangiectasias on the neck that forms a horseshoe shape?

  1. Asteatosis

  2. Rosacea

  3. Poikiloderma

  4. Dermatitis

The correct answer is: Poikiloderma

The term that describes a pattern of redness and telangiectasias on the neck forming a horseshoe shape is "poikiloderma." This condition is characterized by a combination of pigmentation changes, atrophy, and telangiectasias (small dilated blood vessels), often seen in a pattern resembling a horseshoe, particularly on the neck area. Poikiloderma can occur due to various causes, including sun exposure, aging, or underlying health conditions. Asteatosis refers to dry, scaly skin often due to lack of oil or moisture, which doesn't relate to the specific redness and vessel dilation seen in the horseshoe pattern. Rosacea is more commonly characterized by facial redness and pustules, rather than the specific horseshoe-shaped redness on the neck. Dermatitis encompasses a broader range of skin inflammation and doesn't describe the distinct vascular pattern that poikiloderma presents.