Photosensitivity Dermatoses – Clinical Patient Case of the Week

Gerard Kiernan, MD, FAAFP, FHMClinical Pearls, Emergency Medicine, Family Medicine, Guideline Knowledge Check, Internal Medicine, Nurse Practitioner, Nursing RN/PN, Pediatric Emergency Medicine, Pediatric Medicine, Personal Education, Physician Assistant, Urgent Care

Photosensitivity Dermatoses, Phytophotodermatitis - Clinical Patient Case of the Week

Photosensitivity Dermatoses - Clinical Patient Case of the Week

Try this free Dermatology Case Q&A courtesy of Med-Challenger.

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, part of Med-Challenger's library of board exam review and CME question banks.

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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.

Photosensitivity Dermatoses Case

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

See the Answer:

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This case is a sample from the following Med-Challenger exam prep and continuing medical education package.

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