A 25-year-old woman with a history of intermittent asthma has recently returned from a vacation trip to Cancun. This photosensitivity dermatoses comes from our Family Medicine Board Review and CME course.
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Try this case and test your knowledge of photosensitivity dermatoses.
A 25-year-old woman with a history of intermittent asthma has recently returned from a vacation trip to Cancun. The patient developed prominent blisters on the dorsum of her hand (see Figure).
Figure 1.
You also note redness and swelling; the patient also tells you that she is in pain. She was treated with wound care and, upon returning to the United States, the blisters have resolved, but she still has denudated and macerated areas of the skin.
The patient spent time swimming in the ocean, swimming in a cenote (a natural sinkhole from the collapse of limestone bedrock), and recalls helping a bartender squeeze limes to prepare margaritas. The patient is concerned about a tropical dermatologic disease and is asking you for advice.
Question:
What is the likely cause of this condition?
Answer Options:
sea water
fresh water from the cenote
hookworm infection
lime juice
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