Postpartum thyroiditis laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sunny Kumar MD [2]

Laboratory Findings

• Laboratory findings consistent with the diagnosis of PPT depend on the phase of disease and include:
  • {| class="wikitable" !lab values !Hyperthyroid phase !Hypothyroid phase |- |Serum TSH |less than 3.5 |more than 3.5 |- |Serum free T4 |elevated but may be normal |decreased |- |Serum free T3 |elevated or normal |decreased |- |Serum Anti-TPO abs |postive |postive |- |Serum TSH-receptor abs |negative or positive with coexisting grave's disease |negative |- |Serum ESR |normal |normal |- |Serum thyroglobulin Tg |elevated in early phase of destruction of follicles |elevated in early phase of destruction of follicles |- |Radio-iodine uptake |decreased |decreased |}

• Some patients with PPT may have elevated concentration of Serum Anti-TPO abs, which is usually suggestive of future hypothyroidism.