The term ovum is usually restricted to the single female sex cell, but the term egg, in its common use to indicate a bird's egg, refers to a more complex structure, only part of which is produced in the ovary of the bird. The ovum of such an egg is a cell swollen with yolk material. The rest of the eggâe.g., the jelly mass surrounding amphibian eggs, and the shell, membranes, and egg white, or albumen, of bird eggsâis not cellular and is secreted around the ovum as it passes down the oviduct.
Cushing's disease---also known as Cushing's syndrome---and Addison's disease occur when your adrenal glands do not produce proper amounts of a hormone called cortisol.
Cushing's syndrome is a hormonal disorder caused by prolonged exposure of the body's tissues to high levels of the hormone cortisol. Sometimes called hypercortisolism, it is relatively rare and most commonly affects adults aged 20 to 50. It may also develop because of overproduction of cortisol by the body, or adrenal tumors. 2  Cushing's syndrome is diagnosed with tests such as the 24-hour urinary free cortisol level test, the dexamethasone suppression test, the CRH stimulation test, CT scan or MRI, and the dexamethasone-CRH test.