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Updated: Aug 4, 2026
Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation
Published on: April 6, 2017
Abstract:
88 cases of microscopical diapedesis of the red blood cells in the superficial blood vessels of the skin were investigated clinically, histologically and immunohistologically. Polymorphonuclear vasculitis (PMNV) was found in 27 cases, 18 of which also demonstrated immunoglobulins (mostly IgM) in the vessel walls. Complement (C3) was found in 16 cases. The cases with PMNV formed a uniform group as regards preceding infections, drug consumption, clinical features, and pathological urinalysis and laboratory data. The second group consisted of 21 cases of lymphocytic perivasculitis with immunoglobulins and/or complement (LP + ig/C3). It clearly differed clinically from the former group in three respects: urinalysis was normal, a slowing of the venous outflow was found in more than half of the cases and the duration of the disease was longer. The biggest group consisted of 40 cases of lymphocytic perivasculitis without detectable immunoglobulins in the vessel walls (LP). In this group the duration of the disease was shortest. The capillary resistance was lower than in the other groups. The results of this investigation indicate that there are at least three pathogenetically differing groups among the clinical purpuric conditions.
Insights
This study identifies three distinct groups of purpuric conditions based on their underlying pathology. These groups differ in clinical presentation, immunoglobulin deposition, and disease duration, aiding in better diagnosis and treatment strategies for vasculitis.
Area of Science:
- Dermatology
- Pathology
- Immunology
Background:
- Microscopic red blood cell diapedesis in superficial skin blood vessels is a hallmark of various purpuric conditions.
- Understanding the distinct pathogeneses of these conditions is crucial for effective clinical management.
Purpose of the Study:
- To clinically, histologically, and immunohistologically investigate 88 cases of skin purpura.
- To differentiate pathogenetically distinct groups within clinical purpuric conditions.
Main Methods:
- Clinical examination of 88 patients with skin purpura.
- Histological and immunohistological analysis of skin biopsy samples.
- Detection of immunoglobulins (IgM) and complement (C3) in vessel walls.
Main Results:
- Three distinct groups were identified: Polymorphonuclear Vasculitis (PMNV), Lymphocytic Perivasculitis with immune deposits (LP + ig/C3), and Lymphocytic Perivasculitis without immune deposits (LP).
- PMNV cases showed uniform clinical and laboratory findings, often linked to infections or drug consumption.
- LP + ig/C3 cases presented with normal urinalysis, venous outflow slowing, and longer disease duration, while LP cases had the shortest duration and lower capillary resistance.
Conclusions:
- The findings suggest at least three pathogenetically different groups exist among clinical purpuric conditions.
- Distinguishing between PMNV, LP + ig/C3, and LP is essential for understanding disease mechanisms and patient outcomes.
- Further research into these distinct vasculitic pathways can lead to targeted therapeutic interventions.
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