Fear of cancer, an extreme and often irrational anxiety about developing or having the disease.
From Latin 'cancer' directly combined with Greek 'phobos' (fear). This variant form competes with 'cancerophobia' and both emerged around the same time in modern medical terminology.
Both 'cancerophobia' and 'cancerphobia' exist in English, showing how new fears get multiple names depending on whether people follow Greek or Latin naming patterns—a quirk that reveals how medical language evolves organically.
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