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What Does Low TSH, T3 And T4 Levels Indicate?

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Posted on Fri, 9 May 2014
Question: Thank you so much.I wonder about my recent tsh,freet4and t3 results...are so odd. Tsh low and so are t4 and t3? How can this be?
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Answered by Dr. Shehzad Topiwala (3 hours later)
Brief Answer: Thyroid Detailed Answer: Are you taking thyroid medication? I saw you T3 and T4 results but could not find your TSH? Are you on any other medications like prednisone? If you are not on thyroid medication, then a low TSH along with low thyroid hormone levels ie T3 and T4 can reflect an uncommon condition called Secondary hypothyroidism. When this is suspected it is important to look pituitary problems by doing an MRI. If you are on thyroid medication, even then it is quite unusual to have such a picture and still an evaluation is in order to look for 'hypothalamus and pituitary' problems If you are on steroid medication like prednisone then it can lower all these hormones although not so much all 3 are significantly below normal. Do you have any headache, nausea or vomiting or visual problems ? This can be associated with structural problems in the skull where the pituitary is located?
Note: For more information on hormonal imbalance symptoms or unmanaged diabetes with other comorbid conditions, get back to us & Consult with an Endocrinologist. Click here to book an appointment.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Shehzad Topiwala

Endocrinologist

Practicing since :2001

Answered : 1663 Questions

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What Does Low TSH, T3 And T4 Levels Indicate?

Brief Answer: Thyroid Detailed Answer: Are you taking thyroid medication? I saw you T3 and T4 results but could not find your TSH? Are you on any other medications like prednisone? If you are not on thyroid medication, then a low TSH along with low thyroid hormone levels ie T3 and T4 can reflect an uncommon condition called Secondary hypothyroidism. When this is suspected it is important to look pituitary problems by doing an MRI. If you are on thyroid medication, even then it is quite unusual to have such a picture and still an evaluation is in order to look for 'hypothalamus and pituitary' problems If you are on steroid medication like prednisone then it can lower all these hormones although not so much all 3 are significantly below normal. Do you have any headache, nausea or vomiting or visual problems ? This can be associated with structural problems in the skull where the pituitary is located?