Related Experiment Videos
Polyclonal gammopathy with marked increase in serum viscosity
A O Vladutiu1, B M Roach, S M Farahmand
1Department of Pathology, SUNY, School of Medicine and Biomedical Sciences, Buffalo.
Clinical Chemistry
|October 1, 1991
Summary
A man with high gamma globulin levels had elevated serum viscosity but no severe hyperviscosity syndrome symptoms. His condition involved unusual IgG3 aggregates and immune complexes, differing from typical cases.
Area of Science:
- Immunology
- Hematology
- Clinical Biochemistry
Background:
- Polyclonal hypergammaglobulinemia can lead to hyperviscosity syndrome.
- Hyperviscosity syndrome is characterized by specific clinical manifestations like retinopathy and bleeding.
- Rheumatoid factor is often detected in patients with hyperviscosity.
Observation:
- A 45-year-old male presented with elevated gamma globulin levels (102 g/L) and serum relative viscosity (13 nu).
- Despite high viscosity, the patient only reported fatigue and anorexia, lacking typical hyperviscosity syndrome signs.
- Notably, rheumatoid factor was undetectable in his serum.
Findings:
- Analytical ultracentrifugation revealed aggregates of polyclonal IgG3 antibodies in various sizes (10–36 S).
- Immune complex-like material was identified using Raji cell assay and C1q enzyme immunoassay.
- This case presents a unique profile of polyclonal hyperviscosity without common clinical or serological markers.
Implications:
- This case expands the understanding of polyclonal hyperviscosity syndrome presentations.
- It highlights the potential for IgG3 aggregates and immune complexes to cause elevated serum viscosity without severe symptoms.
- Further research may elucidate the specific mechanisms and clinical significance of such atypical presentations.