Difference Between Diagnosis and PrognosisDiagnosis is the investigation or identification of a problem, illness, etc.: “The doctor will present her diagnosis at the conference tomorrow at the hospital.”

Prognosis is the prospect of recovery after an illness or difficult situation: “The doctor’s prognosis for a full recovery pleased the patient very much.”

The diagnosis given by the three specialists confirmed that theprognosis of the patient was good and that she would have a full recovery.