Usage Note
Cancer is used both medically (un cancer du poumon — lung cancer) and as the zodiac sign Cancer (le Cancer). The final -r is pronounced, unlike many French final consonants. The adjective cancéreux/cancéreuse describes something cancerous, and cancérigène (carcinogenic) is the related scientific term.
Examples
"Il suit un traitement contre le cancer."
Natural Translation
He is undergoing treatment for cancer.

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