What is the mortality rate for primary amyloidosis?

The prognosis for primary amyloidosis varies depending on which organs are affected but systemic amyloidosis can cause death within two years, states MedlinePlus. The four-year survival rate for systemic primary amyloidosis was estimated as 30 to 42 percent for patients diagnosed in the 2000s, reports the National Institutes of Health.

Primary amyloidosis is a rare disorder in which abnormal proteins accumulate in tissues and organs, states MedlinePlus. This pathology often leads to damage to the patient's organs including the heart, liver, kidneys. The cause of this disease remains poorly understood. Treatment for this disease may include chemotherapy and stem cell replacement.