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Pars intermedia is seen between pars distalis and pars nervosa. Pars intermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains colloid -filled cysts and two types of cells - basophils and chromophobes. The cysts are the remainder of Rathke's pouch. As technically part of the anterior pituitary, it ...
The posterior wall forms pars intermedia. In some organisms, the proliferating anterior wall does not fully occupy Rathke's pouch, leaving a remnant (Rathke's cleft) between the pars distalis and pars intermedia. This remnant may develop into a large cyst, the Rathke's cleft cyst.
Rathke's cleft cyst. A Rathke's cleft cyst is a benign growth on the pituitary gland in the brain, specifically a mucin -filled [1] cyst in the posterior portion of the anterior pituitary gland. [2] [3] It occurs when the Rathke's pouch does not develop properly and ranges in size from 2 to 40 mm in diameter. [3]
A few sources include the pars intermedia as part of the posterior lobe, but this is a minority view. It is based upon the gross anatomical separation of the posterior and anterior pituitary along the cystic remnants of Rathke's pouch, causing the pars intermedia to remain attached to the neurohypophysis. Function Hormone secretion
Pituitary pars intermedia dysfunction ( PPID ), or equine Cushing's disease, is an endocrine disease affecting the pituitary gland of horses. It is most commonly seen in older animals, [1] and is classically associated with the formation of a long, wavy coat ( hirsutism) and chronic laminitis . Cushing's disease commonly causes hirsutism ...
The interthalamic adhesion (also known as the intermediate mass or middle commissure) is a flattened band of tissue that connects both parts of the thalamus at their medial surfaces. The medial surfaces form the upper part of the lateral wall to the third ventricle . In humans, it is only about one centimeter long – though in females, it is ...
The pituitary gland or hypophysis is an endocrine gland in vertebrates. In humans, the pituitary gland is located at the base of the brain, protruding off the bottom of the hypothalamus. The human pituitary gland is oval shaped, about the size of a chickpea, [2] and weighs 0.5 grams (0.018 oz) on average.
Semidiagrammatic. A major organ of the endocrine system, the anterior pituitary (also called the adenohypophysis or pars anterior) is the glandular, anterior lobe that together with the posterior lobe ( posterior pituitary, or the neurohypophysis) makes up the pituitary gland (hypophysis) which, in humans, is located at the base of the brain ...