Hypothyroidism Main page

Patient Information

Overview

Classification

Primary hypothyroidism

Hashimoto's thyroiditis
Secondary hypothyroidism
Tertiary hypothyroidism

Differentiating different causes of hypothyroidism

Screening

Diagnosis

History and symptoms

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

## Overview[edit | edit source]

## Classification[edit | edit source]

Hypothyroidism may be classified according to TSH levels into 3 different sub types: Primary hypothyroidism, subclinical hypothyroidism, and central hypothyroidism

Type | TSH level | Origin

|
|

Primary hypothyroidism | ↑↑ | thyroid gland
Subclinical hypothyroidism  | ↑
Central hypothyroidism  | Secondary hypothyroidism  | ↓ | pituitary gland
Tertiary hypothyroidism (hypothalamic-pituitary-axis hypothyroidism)  | ↓ | hypothalamus

## References[edit | edit source]

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