UNREGULATED SYNTHESIS
AND SECRETION OF TSH
THYROID DISEASES
UNREGULATED SYNTHESIS
AND SECRETION OF T3 AND T4
THYROID
STATUS
CONGENITAL
SERUM
T3 +T4

SERUM
TSH
IODIDE
DEFICIENCY
AUTOIMMUNE:
THYROIDITIS
HYPO
HYPER
HYPO
HYPO
HYPER
HYPER
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
THYROID TUMOR
PITUITARY TUMOR
CAUSE OF DISEASE

DEFECT IN IODIDE TRAP OR THYROID HORMONE SYNTHESIS
DIET: (i) LOW IN IODIDE OR (ii) GOITROGENS PRESENT
DESTRUCTION OF THYROID
 TISSUE DUE TO INFLAMMATION
AUTOANTIBODIES TO THE TSH
RECEPTOR PROVIDE CONTINUOUS UNREGULATED STIMULUS
DISEASE
TYPE
AUTOIMMUNE:
GRAVES DISEASE