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A 6-month-old girl is brought to the office due to a rash on her cheeks, arms, and chest for the past 2 weeks. She is constantly scratching and rubbing her arms, and her parents are having a hard time keeping her hands away from the affected areas. The patient drinks breast milk and formula and has not started solid foods. There are no household pets, and she is bathed every 2 days with a body wash free of fragrance, alcohol, and dyes. The patient has not been exposed to new clothing, detergents, lotions, or other substances. Physical examination of the arms is shown in the exhibit. The face and chest have similar lesions. There is no rash in the diaper area or on the palms or soles. Which of the following is the most likely diagnosis in this patient?
Desert Environment
A biome characterized by very little rainfall, extreme temperatures, and sparse vegetation, making it a challenging habitat for life.
Photosynthetic Mode
A method by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose.
CAM
A type of photosynthesis (Crassulacean Acid Metabolism) adapted by some plants to minimize water loss in arid conditions by fixing CO2 at night.
CAM Plants
Plants that utilize Crassulacean Acid Metabolism, a carbon fixation pathway that allows them to conserve water in arid conditions by opening their stomata at night.
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