Idiopathic Hypereosinophilic Syndrome in a Professional Athlete.

OBJECTIVE: To present the case of an athlete with hypereosinophilic syndrome (HES).

CASE REPORT: We present a 25-year-old female athlete, with no significant past medical history, who had a two-month history of progressive dry cough, wheezing, exertional dyspnea, and chest pain. Physical examination revealed patient to be febrile to 101.6 degrees Fahrenheit and tachycardic to 120 beats per minute with new leukocytosis of 35.9x109 /L and eosinophilia of 24,000/μL. She was also found to have elevated troponins ~1.5 ng/mL and creatine kinase (CK) 203 U/L. Her overall clinical picture was concerning for hypereosinophilic syndrome with multiorgan system involvement.

CONCLUSION: Findings endorse the diagnosis of HES. HES is a rare condition that is difficult to diagnose. Early clinical diagnostic signs of HES may include fatigue, cough, breathlessness, and fever.