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What is the characteristic feature of polymorphic eruption of pregnancy?
Itchy blisters on the abdomen
Rash that spares the umbilical area
Presence of systemic symptoms
Non-itchy pink rings
The correct answer is: Rash that spares the umbilical area
In polymorphic eruption of pregnancy, also known as pruritic urticarial papules and plaques of pregnancy (PUPPP), the rash typically presents on the abdomen but notably spares the umbilical area. This characteristic differentiation is significant, as it helps in the diagnosis. The rash consists of itchy red papules and plaques but does not extend to the central umbilical region, making this feature distinctive. Other options, while they may describe skin changes seen in different conditions, do not accurately represent polymorphic eruption of pregnancy. For example, the presence of systemic symptoms is often associated with other conditions rather than with this specific eruption, which is generally localized and does not involve systemic manifestation. Additionally, itchy blisters are not a typical feature, as the rash generally manifests with papules and plaques that resemble hives rather than blisters. Non-itchy pink rings might relate more to other dermatological conditions, but in the context of polymorphic eruption of pregnancy, the rash is specifically characterized by its pruritus and the umbilical sparing feature.