×
MedSchool: Ace Your OSCEsThe Medical Company
 
 
 
 
 
GET - On the App Store
View
Test Findings
 
 

Reduced Free T4

 
Bookmark

Overview

Reduced T4 with elevated TSH is suggestive of primary hypothyroidism, which normal or reduced TSH may be present with certain conditions or due to false reduction.
  • Causes of Reduced Free T4

  • Elevated TSH

  • Primary hypothyroidism
  • Reduced / Normal TSH

  • Nonthyroidal illness
  • Recent treatment of hyperthyroidism
  • Central hypothyroidism
  • Congenital TSH or TRH deficiency
  • False Reduction

  • Increased TBG - pregnancy, oral oestrogen, SERMs, hepatitis
  • Drugs - aspirin, phenytoin, carbamazepine
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Want more info like this?
  • Your electronic clinical medicine handbook
  • Guides to help pass your exams
  • Tools every medical student needs
  • Quick diagrams to have the answers, fast
  • Quizzes to test your knowledge
Sign Up Now
   
 
 

Snapshot: Initialising...