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Thrombocytosis in low birthweight infants: a physiological phenomenon in infancy
Insights
Thrombocytosis, or high platelet counts, is common in healthy preterm infants. This finding challenges previous assumptions linking low platelets to prematurity, suggesting a different physiological response in premature neonates.
Area of Science:
- Neonatal Medicine
- Hematology
- Pediatrics
Background:
- * Prematurity is often associated with thrombocytopenia (low platelet counts), typically attributed to severe illness.
- * This association requires re-evaluation in healthy preterm infants.
Purpose of the Study:
- * To investigate platelet counts in healthy preterm infants.
- * To determine if thrombocytosis is a phenomenon related to prematurity itself.
Main Methods:
- * Platelet counts were measured in 117 healthy preterm infants (birthweight < 2000 g).
- * Infants were followed from 2 weeks to 6 months post-birth.
Main Results:
- * Platelet counts in this cohort were higher than previously reported.
- * The 95% range was 160–675 X 10(9)/l, with a median of 375 X 10(9)/l.
- * These values are higher than those considered normal for term infants.
Conclusions:
- * Thrombocytosis appears to be a common finding in healthy preterm infants.
- * This suggests prematurity itself, not just illness, may be linked to elevated platelet counts.
Abstract:
Prematurity has traditionally been connected with thrombocytopenia, although this is unlikely to be associated with prematurity itself but rather with serious illnesses in such infants. Platelet counts were measured in 117 healthy preterm infants with birthweights less than 2000 g, who were followed up from 2 weeks to 6 months. In this series the platelet counts were high compared with those in previous reports, and also compared with what is considered normal for term infants. The 95% range was between 160 and 675 X 10(9)/1, with a median value of 375 X 10(9)/1. The data suggest that thrombocytosis is a phenomenon related to prematurity.