| THYROID
DISEASES |
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|
| SERUM |
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| TSH |
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|
|
|
| DISEASE |
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| TYPE |
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|
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| THYROID |
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| STATUS |
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| SERUM |
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| T3 +T4 |
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| CAUSE
OF DISEASE |
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| DEFECT
IN IODIDE TRAP OR |
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| THYROID
HORMONE |
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| SYNTHESIS |
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| CONGENITAL |
| HYPO |
| LOW |
| HIGH |
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|
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| DIET:
(i) LOW IN IODIDE |
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| OR
(ii) GOITROGENS |
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| PRESENT |
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|
|
| IODIDE |
|
| DEFICIENCY |
|
| HYPO |
| LOW |
| HIGH |
|
|
|
| DESTRUCTION
OF THYROID |
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| TISSUE DUE TO INFLAMMATION |
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|
|
| AUTOIMMUNE: |
|
| THYROIDITIS |
|
| HYPO |
| LOW |
| HIGH |
|
|
|
|
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| AUTOANTIBODIES
TO THE TSH |
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| RECEPTOR
PROVIDE CONTINUOUS |
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| UNREGULATED STIMULUS |
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|
|
|
| AUTOIMMUNE: |
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| GRAVES
DISEASE |
||
| LOW |
| HYPER |
| HIGH |
| THYROID
TUMOR |
| HYPER |
| HIGH |
| LOW |
|
|
|
| UNREGULATED
SYNTHESIS |
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| AND
SECRETION OF T3 AND T4 |
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|
|
|
| UNREGULATED
SYNTHESIS |
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| AND
SECRETION OF TSH |
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| PITUITARY
TUMOR |
| HYPER |
| HIGH |
| HIGH |
