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[Platelet count and clinical profile of anticardiolipin positive leg ulcers]
Thelma Laroka Skare1, Carmen Autralia Paredes Marcondes Ribas, Osvaldo Malafaia
1Programa de Pós-Graduação em Princípios da Cirurgia do Hospital Universitário Evangélico de Curitiba/Faculdade Evangélica do Paraná, Curitiba, PR - BR. tskare@onda.com.br
Insights
Anticardiolipin antibodies are more common in patients with leg ulcers. However, factors like ulcer type or platelet count do not predict antibody presence.
Area of Science:
- Immunology
- Vascular Medicine
- Dermatology
Context:
- Leg ulcers represent a significant clinical challenge with diverse etiologies.
- Anticardiolipin antibodies (aCL) are associated with thrombotic events and autoimmune conditions.
- Understanding the prevalence and predictors of aCL in leg ulcer patients is crucial for diagnosis and management.
Purpose:
- To determine the prevalence of anticardiolipin antibodies (IgG and IgM) in patients presenting with venous, diabetic, and arterial leg ulcers.
- To investigate whether platelet count, a history of venous thrombosis, obstetrical history, or the presence of livedo reticularis are associated with aCL positivity in this cohort.
Summary:
- This study found a significantly higher prevalence of anticardiolipin antibodies in patients with leg ulcers (7.2%) compared to controls (1.3%).
- No significant association was observed between aCL positivity and gender, previous venous thrombosis, history of abortions, or platelet count.
- The presence of livedo reticularis was noted in only two patients, limiting conclusions regarding its predictive value.
Impact:
- The findings suggest an increased prevalence of anticardiolipin antibodies in individuals with leg ulcers, highlighting a potential, yet uncharacterized, link.
- Clinical markers such as ulcer type, platelet count, and thrombotic history are not reliable indicators for identifying aCL positivity in leg ulcer patients.
- Further research is warranted to elucidate the specific role and implications of anticardiolipin antibodies in the pathogenesis and management of leg ulcers.
Objective:
To study the prevalence of anticardiolipin antibodies in patients with venous, diabetic and arterial leg ulcers and to verify if platelet count, previous history of venous thrombosis, obstetrical history and the finding of livedo reticularis are markers of this autoantibody positivity.
Methods:
151 patients with leg ulcer (81 with venous, 50 with diabetic and 20 with arterial ulcers) and 150 controls were included. In both groups search for the presence of IgG and IgM anticardiolipin and platelet count was done. In the leg ulcer group demographic data, obstetrical history, previous history of venous thrombosis as well as presence of livedo reticularis by physical examination were pointed out. Data was grouped in contingency and frequency tables and the tests of Fisher and chi-squared were used for nominal variables and Mann Whitney and Kruskall Wallis for numerical variables. The adopted significance was of 5%.
Results:
It was found an anticardiolipin prevalence of 7.2% (n=12) in the leg ulcer group and of 1.3% (n=2) in the control group (p=0.01). Leg ulcer patients with anticardiolipin did not differ from those without it in gender (p=0.98), previous history of venous thrombosis (p=0.69), previous history of abortions (p=0.67) and platelet count (p=0.67). Only two patients had livedo reticularis which precluded any conclusion on this data.
Conclusion:
There is an increased prevalence of anticardiolipin antibodies in the general population with leg ulcers. Clinical characteristics of ulcers as well as platelet count do not help in the identification of these patients.
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