click below
click below
Normal Size Small Size show me how
Path 9
NeuroEndocrine Systems
Question | Answer |
---|---|
How are neuroendocrine cells readily identified | by their characteristic positivity with silver stains and their immunoreactivity with antibodies directed against neuroendocrine products |
Most neuroendocrine cells are derived from? | neural crest |
where do gastroenteropancreatic neuroendocrine cells come from? | endoderm |
Are steroid producing cells of the ovary, testis, thyroid, and adrenal cortex neuroendocrine cells? | no |
what is primary hyperparathyroidism | excess PTH produced by parathyroid in absence of extraparathyroid stimulus |
what is secondary hyperparathyroidism | hypocalcemic stimulation of PTH secretion and cell proliferation |
what is the most common cause of secondary hyperparathyroidism | chronic renal failure |
what is tertiary hyperparathyroidism | autonomous primary hyperparathyroidism in patients with secondary hyperparathyroidism |
what causes 80% of primary hyperparathyroidism | adenoma (usually a single gland) |
How can you differentiate hyperplasia vs. adenoma with primary hyperparathyroidism | hyperplasia is usually all 4 glands and adenoma is often 1 gland |
Someone with high calcium (>15), a neck mass and bone disease may have? | parathyroid carcinoma |
what is the most likely cause of death in people with parathyroid carcinoma | hypercalcemia |
The adrenal cortex is derived from? | mesoderm |
what is Addison's disease | primary chronic adrenal insufficiency usually autoimmune |
what is a "crisis" in chronic Addison's disease | primary acute adrenal insufficiency |
Waterhouse Friderichsen syndrome is primary adrenal insufficiency due to ? | meningococcemia |
what is Conn's syndrome | hyperaldosteronism |
what is Cushing's syndrome | hypercortisolism |
what does an adrenal adenoma secrete | may secrete aldosterone, cortisol, or sex steroids (many are nonfunctioning) |
what does an adrenal adenoma look like | most are solitary small and bright yellow |
How do you distinguish an adrenal adenoma from a carcinoma | carcinomas are large, pleomorphic, have a high mitotic rate, atypical mitosis, venous invasion, necrosis, and capsular invasion |
what is an adrenal mass in the medulla that secretes epinephrine and norepinephrine resulting in hypertension | pheochromocytoma |
this tumor is one of the most common tumors in infancy and childhood and is the most common congenital tumor | Neuroblastoma |
what will you find in the urine with neuroblastoma | increased urinary homovanillic acid, vanillylmandelic acid, dopamine, or metanephrine |
what is a benign tumor consisting of a mixture of mature adipose tissue and hematopoietic cells often found as an incidental finding at autopsy | myelolipoma |
what are chemodectomas | paragangliomas of the carotid and aorticopulmonary paragangliomas |
paragangliomas form distinctive cell nests called ? that are arranged around capillary channels | zellballen |
How are islet cell tumors of the pancreas classified | according to the hormones that they produce |
what is a beta cell pancreatic tumor called | insulinoma |
what is the most common type of islet cell tumor | insulinoma |
what is another name for a gastrinoma | Zollinger-Ellison syndrome |
What would you expect to see in a patient with Zollinger Ellison Syndrome | multiple peptic ulcers, high gastric acid secretion, high plasma gastrin levels |
what percent of Zollinger Ellison Syndrome are malignant | 65% |
What is the gene that predisposes to MEN-1 | menin tumor supressor |
what is the gene that predisposes to MEN II | RET proto-oncogene |
you have a neoplasm of mucocutaneous neuromas, pheochromocytomas, and medullary cancer of the thyroid. Which MEN is it | MEN IIb |
you have neoplasms or hyperplasias of the parathyroid gland, adrenal cortex, pituitary and pancreas plus peptic ulcers and gastric hypersecretion which MEN syndrome to you have | MEN I |
Which MEN syndrome has multiple pheochromocytomas, medullary carcinomas of the thyroid, and parathyroid hyperplasia or adenoma | MEN IIa |