Exam3Lecture4

Microscopic and asymptomatic dysfunction incidence is

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ions Hyperpituitarism - Primary Adenoma Hyperpituitarism Primary Primary adenomas - usually benign – Within the anterior pituitary » Microscopic and asymptomatic (dysfunction) – Incidence is about 22% – Unknown cause Alterations Hypothalamic-Pituitary System Alterations Hyperpituitarism - Primary Adenoma Hyperpituitarism Primary Pathophysiology with expanded adenomas – Can result in visual disturbances » Pressure on specific visual nerves Impair the oculomotor system – Can alter hypothalamic control » Wakefulness » Thirst » Appetite » temperature Alterations Hypothalamic-Pituitary System Alterations Hyperpituitarism - Primary Adenoma Hyperpituitarism Primary Symptoms - depend on region under pressure from Symptoms adenoma adenoma – – Visual changes - optic chiasm Visual optic Example Hyposecretion - GH (growth hormone) » In adults - fatigue (subtle symptoms) Evaluation - identify region involved – CT scanning – MRI (magnetic resonance imaging) Treatment - regulate hormone dysfunctions Alterations Hypothalamic-Pituitary System Alterations Hypersecretion of Growth Hormone Acromegaly – Defined - adults exposed to high levels of GH – Children (epiphyseal plates are not closed) » Termed “gigantism” Termed » Growth of long bones Growth Alterations Hypothalamic-Pituitary System Alterations Hypersecretion of Growth Hormone Acromegaly – Rare - 40 cases per million individuals – 15% pituitary tumors secrete GH – Most common cause » Primary Autonomous GH secreting pituitary adenoma – Slow progressing disease – Decreased life expectancy Alterations Hypothalamic-Pituitary System Alterations Hypersecretion of Growth Hormone Acromegaly – Increase deaths due to » Hypertension » Diabetes mellitus » Increased incidence of some cancers Colon cancer Alterations Hypothalamic-Pituitary System Alterations Hypersecretion of Growth Hormone GH secretion is non - cyclical – Usually sleep related peak GH...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online