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:

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

lab values	Hyperthyroid phase	Hypothyroid phase
Serum TSH	less than 3.5 micrograms/dl	more than 3.5 micrograms/dl
Serum free T4	elevated but may be normal	decreased
Serum free T3	elevated or normal	decreased
Serum Anti-TPO anitbodies	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