Diagnosis

Many types of disorders can raise your eosinophil level, including certain infections, allergies and reactions to medications. When trying to determine whether you have hypereosinophilic syndrome (HES), your doctor is likely to ask about your travel history and any medications you're taking, to help rule out these other causes.

Laboratory tests

Your doctor may also need information from some of the following lab tests:

• Blood tests, to detect autoimmune conditions, parasitic infections, or problems with your liver or kidneys
• Allergy tests, to detect environmental or food allergies
• Stool tests, to detect parasitic infections such as hookworm
• Genetic test, to check for a gene mutation that can cause HES

Imaging tests

Imaging tests may include:

• X-rays, to check the condition of your lungs
• CT scan, to detect problems in the chest, abdomen and pelvis
• Echocardiogram or MRI, to assess heart function