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lab results ped thyroid

my son, 5mths old (was a premie born at 31wks) has labs results t4 3.38, free t4.80, abd tsh 3.94, he was placed on 25mg of sythorid for 15 days. while on the drug T48.56, fT4 1.33, TSH .04 and T3 112.  Was off the drug for 1mth, his recent labs without drugs show T4 4.41, freeT4 .76, TSH 3.25 and T3 140.  Dr does not know what to make of these results.  What do you think???
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314892 tn?1264623903
Infants have higher TSH levels than adults. Was his heel stick test normal at birth?
Has he had thyroid antibodies tested?

Here is a good link:

http://www.aafp.org/afp/20070801/practice.html

Although TSH concentrations in the first few months of life typically are higher, persistent basal TSH concentrations of greater than 10 mU per L after two weeks of age generally are considered abnormal and should be treated. Infants who do not receive treatment should have repeat measurement of FT4 and TSH at two and four weeks, with initiation of treatment if results remain abnormal.

It seems, according to this, that treatment is warranted at levels over 10 for infants.

If the pediatrician doesn't know how to interpret these results, I would see a Pediatric Endocrinologist. (As AR-10 says above)
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213044 tn?1236527460
https://online.epocrates.com/noFrame/

Pediatric dosing is somewhere between 8-15mcg per kilo of body weight, depending on age and other variables.

You may have to go to 25mcg every other day, or break them in half.

What I think is you should have an Endocrinologist familiar with pediatric cases involved.
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