disorder of pituitary gland
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Disorder of Pituitary gland
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Disorder of pituitary gland• Hyperpituitarism-Hyperfunctioning of anteriorpituitary gland
Giagantism and acromegalyHyperprolactinaemia and Cushing syndrome
• Hyperfunctioning of posterior pituitary glandInappropriate release of ADH
• Hypopituitarism-Hypofunctioning of anterior pituitary: Seehan’
syndrome and Dwarfism-Hypofunction of posterior pituitary: Diabetes insipidus
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Gigantism and Acromegaly
• Clinical syndromes resulting from sustained excess of growth hormone.
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Gigantism
-When growth hormone excess occurs prior to closure of epiphysis
-Occurs in prepubertial boys and girls-Clinical features:
Generalized increase in body size with disproportionately long arm and legs.
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Acromegaly
• When growth hormone excess occurs after closure of epiphysis
• Acro: extremity: • Mega: Large• Increase growth of extremities• Clinical features: -Soft tissue changes: Skin thickening-Acral enlargement: Large hands and large feet-Bone changes: Growth of lower jaw: Prognathism
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AcromegalyGigantism
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Dwarfism
• Deficiency of growth hormone in children before growth is completed resulting retarted growth.
• Short stature
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Dwarfism
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Diabetes insipidus
• Antidiuretic hormone (ADH) deficiency causes diabetes insipidus
• Charecterized by excessive urination (polyuria) due to inability of kidney to reabsorb.
• Cause:-Inflammatory and neoplastic lesion of
hypothalamus-Destruction of pituitary gland: head injury,
surgery and radiation…