Clinical Characteristics and Treatment Outcome of Chinese Patients With Systemic Amyloid Light-Chain Amyloidosis: A Retrospective Single-Center Analysis

A retrospective analysis of 123 amyloid light-chain amyloidosis patients in a single center of China found that compared to other studies abroad, patients were younger and more had organ involvement. Hypoalbuminemia, renal failure, and heart involvement were important to survival. Additionally, rapid treatment response time (within 3 months) significantly improved prognosis. Background: Amyloid light-chain (AL) amyloidosis is a disease caused by tissue deposition of light-chain proteins in vital organs that results in progressive organ damage. We analyzed the clinical characteristics of 123 AL amyloidosis patients and performed an overall survival (OS) analysis to identify critical baseline factors. Patients and Methods: Patients (median age, 54 years) were diagnosed with organ involvement of kidney (98.4%), gastrointestinal (73%), cardiac (56%), liver (13%), or nervous system (10%), and multiorgan involvement was observed in 91% of patients. Treatment regimens of transplantation, bortezomib plus dexamethasone, melphalan plus dexamethasone, and prednisone-based regimens or no treatment resulted in 3-year OS rates of 72%, 60%, 55%, and 41 %, respectively. Results: Median OS was 38 months and was affected by age (>= 65 years), hypoalbuminemia, renal failure, heart involvement, and organ response time (within 3 months). Multivariate analysis indicated that these were independent prognostic factors on OS except for age. Conclusion: The AL amyloidosis patients in this study presented somewhat different features and outcomes compared to others, with younger age and higher rates of organ involvement.