The phrase "bleak prognosis" means that the outlook or prediction for something, usually a person's health or a situation, is not good and is likely to be negative or pessimistic. Full definition
The years of our growing relationship of trust and your devoted care... and despite the initial bleak prognosis... our Beau has enjoyed a relatively healthy life, enriching our lives with his love and enthusiasm for living! (memphisveterinaryspecialists.com)
The malignancy often remains undiagnosed until the cancer has spread, leaving patients with a bleak prognosis and a five - year survival rate of less than 30 percent. (scientificamerican.com)