What Causes High Platelet Count in Infants?

My daughter is 15 days old and I took her for a blood test today. One of the results showed her platelet count was elevated at 669X10^9/L, with the normal range being 100-300X10^9/L. Is this a problem? It is recommended to bring the child to a hematology department for a detailed examination to determine the cause and then provide treatment accordingly. A platelet count of 440X10^9/L in infants is not particularly high. Children’s platelet counts may be higher than the normal level. Many factors can affect platelet numbers. No additional treatment is needed for other indicators; observation is sufficient. If the infant shows no other abnormalities, it is recommended to observe for a period of time. If the total count remains high, relevant checks should be conducted.
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