What is Primary hypothyroidism by definition?

[Guest guest]

I'm not sure is this is a daft question or not but it is the one my

friends and family have been asking ME since the RCP story broke. I

realised that I don't know as I always just say I have an underactive

thyroid full-stop. Whether it is primary or not has never occured to

me!

Tracey

(80% better on levothyroxine than without treatment, but I'd like to

tackle that remaining 20%)

[Guest guest]

Also, the most common type which is usually

overlooked:

Peripheral Hypothyroidism -- AKA: Type 2

Hypothyroidism:

http://www.type2hypothyroidism.com/

http://www.calciumlie.com/2008/08/type-2-hypothyroidism.html

('Peripheral' indicates exterior to the thyroid

gland.)

Peripheral hypothyroidism ( " resistance to thyroid hormone " )

includes faulty conversion (T4 > T3), and T4 or T3 transport

(as with low cortisol), plus nuclear and mitochondrial receptor

malfunction -- including receptor blockage by Reverse T3.

(This is not a complete list.)

However, doctors are trained to believe (wrongly) that

" resistance to thyroid hormone " is a very rare genetic

disorder, and to ignore all of the above, despite all

evidence and suffering.

Bill

PS - " Tertiary Hypothyroidism " refers to hypothalamic

dysfunction.

TRH from the hypothalamus triggers the pituitary's TSH output.

--- At 04:00 AM 2/21/2009, auto_immune wrote:

>

Hi Tracey,

Primary Hypothyroidism is diagnosed when the thyroid gland can't

produce the amount of hormones that are demanded by the pituitary gland.

The reasons for that failure is in most cases an autoimmune destruction

of the thyroid gland and to a much lesser degree due to old age and/or

other underlying diseases. - I am not quite sure which conditions

- other than autoimmunity - might lead to primary Hypothyroidism... could

someone tell me, please?

Secondary Hypothyroidism is caused by the failure of the

pituitary gland to stimulate the thyroid gland into hormone

production.

There is also a condition called Tertiary Hypothyroidism, but I

don't really understand much about this one, other than it presents with

a very low TSH level....