Related Experiment Videos
An autopsy case of light chain deposition disease
N Kasahara1, H Tamura, O Matsumura
1Fourth Department of Internal Medicine, Saitama Medical School, Kawagoe.
Insights
This case report details light chain deposition disease (LCDD) with unusual fibrillar structures and significant calcification in multiple organs. These findings highlight the diverse pathological presentations of LCDD.
Area of Science:
- Nephrology
- Pathology
- Immunology
Background:
- Light chain deposition disease (LCDD) is a rare plasma cell dyscrasia characterized by the deposition of monoclonal immunoglobulin light chains in various organs, primarily the kidneys.
- While typically presenting with amorphous, non-amyloidotic deposits, the pathological spectrum of LCDD is still being elucidated.
Observation:
- This report focuses on a unique case of LCDD in a 40-year-old male, diagnosed in 1987 and deceased from sepsis 3.5 years later.
- Autopsy revealed eosinophilic amorphous material, distinct from amyloid, in vessel walls and around parenchymal cells across nearly all examined organs.
- Ultrastructural analysis identified fibrillar structures within the deposits, alongside granular material.
Findings:
- The deposits in this LCDD case exhibited unusual fibrillar ultrastructure, differing from typical presentations.
- Marked calcification was a prominent feature, observed in the myocardium, skeletal muscles, adrenal glands, and arteries.
- These pathological findings suggest a more complex deposition mechanism and potential for widespread organ involvement in LCDD.
Implications:
- The presence of fibrillar structures and extensive calcification in LCDD broadens the understanding of its histopathological variability.
- These unusual findings may have implications for diagnostic criteria and therapeutic strategies for light chain deposition disease.
- Further research into the pathogenesis of these specific LCDD manifestations is warranted to improve patient outcomes.
Abstract:
This report describes a case of light chain deposition disease (LCDD) with unusual findings of fibrillar structures in the deposits and marked calcification in several organs. A forty-year-old man was initially diagnosed with LCDD in 1987, and died of sepsis three and one-half-years later. Histological examination of autopsy specimens demonstrated eosinophilic amorphous materials, which differed from amyloid, in vessel walls or around parenchymal cells in almost every organ examined. Ultrastructurally, in addition to granular deposits, fibrillar structures were also seen in the deposits. Marked calcification was present in the myocardium, skeletal muscles, adrenal glands and arteries.