A prediction of the course of a disease WordNet 3.0 & Open English WordNet

Prognosis is a medical term for predicting the likely or expected development of a disease, including whether the signs and symptoms will improve or worsen or remain stable over time; expectations of quality of life, such as the ability to carry out daily activities; the potential for complications and associated health issues; and the likelihood of survival. Wikipedia

Doctor's prediction about a disease. Wikipedia Disambiguation

A medical term denoting the doctor's prediction of how a patient's disease will progress, and whether there is chance of recovery. OmegaWiki

A forecast of the future course, or outcome, of a situation; a prediction. Wiktionary

Forecast of the future course, or outcome, of a situation. Wiktionary (translation)