A 33‐Year‐Old Woman from Nigeria with Eosinophilia

A 33-year-old woman who had moved to the United States from Nigeria 3 years before presentation had an eosinophil count of 2600 cells/,uL (32% of the total cell count) noted on a routine complete blood cell count. She had a history of subcutaneous swellings that occurred on her trunk and extremities every few months during the past 10 years. These swellings were relatively painless but were warmto the touch, and they always resolved within 3 or 4 days. The findings of a physical examination done at presentation were unremarkable. Specifically, no subcutaneous swellings or dermatologic findings were