18. EtiologiaEtiologia
• Deficitul de iod cel mai important factorDeficitul de iod cel mai important factor
• Alti factori: exces de iod, minerale,Alti factori: exces de iod, minerale,
defecte congenitaledefecte congenitale
19. PatogeniePatogenie
Hiperplazia tiroidiana prod. sub act. fact deHiperplazia tiroidiana prod. sub act. fact de
stimulare a cresterii tiroidienestimulare a cresterii tiroidiene
Factori extratiroidieni:Factori extratiroidieni:
• Deficit de iod - TSH - hiperplazie tiroidianaDeficit de iod - TSH - hiperplazie tiroidiana
• GSI (thyroid – growth – stimulating –GSI (thyroid – growth – stimulating –
immunoglobulin)immunoglobulin)
Factori intratiroidieni (citokine)Factori intratiroidieni (citokine)
Heterogenitatea morfologica si functionalaHeterogenitatea morfologica si functionala