Share 'Diagnosis'

It is nowadays common, in English, to use the expression "I was diagnosed with [cancer or whatever]".  It is inelegant, because it is the disease which is diagnosed, not the person.  I am trying to think what one would say in French.  "On a diagnostiqué un cancer" might do, if the context tells you who you're talking about.  But what if you want to make it clear that it is "I" who have the cancer?