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Published on: November 29, 2024
Antiphospholipid syndrome and recurrent thrombosis in children
Insights
Pediatric antiphospholipid syndrome (APS) presents uniquely, with venous thrombosis and stroke common. Anticoagulant therapy after initial events may prevent recurrence in children with APS.
Area of Science:
- Pediatric Rheumatology
- Hematology
- Autoimmune Diseases
Background:
- Antiphospholipid syndrome (APS) is rare in children, with limited data on its clinical features and outcomes.
- Understanding pediatric APS is crucial for early diagnosis and management.
Purpose of the Study:
- To analyze clinical and laboratory manifestations in a pediatric APS cohort.
- To assess the influence of inherited thrombophilia on outcomes in pediatric APS.
Main Methods:
- Multicenter retrospective study of pediatric patients with APS without prior autoimmune disease.
- Review of clinical data, laboratory findings, hereditary thrombophilia, and patient outcomes.
Main Results:
- The cohort included 28 children (mean age 10.6 years); common initial symptoms were venous thrombosis, stroke, and thrombocytopenia.
- Long-term follow-up revealed significant central nervous system (57.1%) and hematologic involvement (9%). Systemic lupus erythematosus (SLE) developed in 5 female patients.
- Hereditary thrombophilia did not predict recurrence, but anticoagulant treatment after the first thrombotic event was associated with fewer recurrences.
Conclusions:
- Pediatric APS exhibits distinct characteristics compared to adult forms.
- Systemic lupus erythematosus (SLE) can develop in a notable proportion of girls with pediatric APS.
- Preventive anticoagulant therapy following the initial thrombotic event appears crucial in managing pediatric APS and preventing recurrences.
Objective:
Few studies have addressed antiphospholipid syndrome (APS) among children. Our aims were to analyze the clinical and laboratory manifestations in a pediatric APS cohort and to assess the influence of inherited thrombophilia factors on the outcome of children with APS.
Methods:
This was a multicenter study of children with APS who had no previous systemic autoimmune disease. We retrospectively reviewed their clinical and laboratory data, including hereditary thrombophilic deficits and outcomes.
Results:
The cohort comprised 28 patients (17 females, mean +/- SD age at onset 10.6 +/- 6.1 years). The most common initial manifestations of APS were venous thrombosis, stroke, and thrombocytopenia. Lupus anticoagulant was detected in 96% of those tested. After a mean +/- SD followup of 5.7 +/- 4.8 years, 16 children (57.1%) had central nervous system disease, 9 exhibited hematologic involvement, and 5 (all females) had systemic lupus erythematosus (SLE). None had renal, heart, or new skin disease. Seven of 24 patients exhibiting vascular thrombotic events had recurrences. Infants with perinatal stroke had monophasic disease, and other manifestations of APS did not develop later. Hereditary thrombophilia was more common in children who experienced a single episode of APS (8 [53.3%] of 15 patients) than in those who experienced recurrences (2 [28.6%] of 7 patients). However, only 2 patients in the latter group (28.6%) received anticoagulants after the first manifestation, compared with 12 (70.6%) of the 17 patients without recurrences.
Conclusion:
APS in children has unique features. SLE may develop in a significant percentage of girls presenting with APS. Hereditary thrombophilia did not predict recurrent thrombosis, whereas the preventive impact of anticoagulant treatment following the first thrombotic event was noteworthy.
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