Explore how elevated eosinophil levels might signal cancer and what specific counts could indicate a risk. High Eosinophils Don’t Necessarily Indicate Cancer It’s worth repeating that while eosinophilia is something your healthcare provider will investigate, a high level doesn’t mean you have cancer . If your count is elevated, your provider will review your medical history, symptoms and test results to determine why that is the case. What level of eosinophils indicate cancer on a blood test? Find out what high and low values mean , their relationship to diseases and next steps. What level of eosinophils indicate cancer ? Sometimes, a blood test shows a high level of eosinophils , and that can be a sign of something serious, like cancer . But a high eosinophil count doesn’t always mean cancer . It could be due to allergies, infections, or other health issues. To understand this better, we need to look at some situations where eosinophils and cancer might be connected.