What is a tectal plate?
The quadrigeminal plate, also known as the tectal plate or tectum, is constituted by the superior and inferior colliculi. The tectum is the dorsal portion of the midbrain (brainstem), located posteriorly to the mesencephalic aqueduct. It derives from the alar plate of the neural tube during embryonic development.
What is pituitary germinoma?
Purpose. Intracranial germinomas are exceedingly rare tumors found in the pineal and suprasellar regions. The extremely low incidence of pituitary germinoma has resulted in a significant gap in knowledge regarding its demographics, management, and treatment outcomes.
What is a tectal plate glioma?
Tectal glioma is a slow-growing brain tumor in the tectum (or roof of the brain stem), which controls vital body functions such as breathing, heart rate, and blood pressure. Tectal glioma is a low-grade glioma.
Is Tectal glioma malignant?
CONCLUSIONS Analysis of this case series shows that a major subpopulation of tectal gliomas show progression and malignant transformation in children as well as in adolescents. These tumors therefore cannot be considered inert lesions and require histological confirmation and close follow-up.
Where is Quadrigeminal plate?
midbrain
The quadrigeminal plate, also known as the tectal plate or tectum, is constituted by the superior and inferior colliculi. The tectum is the dorsal portion of the midbrain (brainstem), located posteriorly to the mesencephalic aqueduct. It derives from the alar plate of the neural tube during embryonic development.
What is the meaning of Tectal?
tec·ta (-tə) A rooflike structure of the body, especially the dorsal part of the midbrain. [Latin tēctum, roof, from neuter past participle of tegere, to cover; see (s)teg- in Indo-European roots.] tec′tal (-təl) adj.
What is a low-grade Tectal glioma?
A tectal glioma is a low-grade, slow-growing brain tumor in the tectum, the roof of the brain stem. The brain stem controls vital body functions such as breathing, heart rate and blood pressure.
Are gliomas always malignant?
Glioma is a type of brain cancer that is often – but not always – malignant. In some cases, the tumor cells do not actively reproduce and invade nearby tissues, which makes them noncancerous. However, in most cases, gliomas are cancerous and likely to spread.
What does the Quadrigeminal plate do?
The quadrigeminal plate, also known as the tectal plate, is the portion of the midbrain tectum upon which the superior colliculus and inferior colliculus sit. Masses in the region of the tectum can cause obstruction of the cerebral aqueduct resulting in obstructive hydrocephalus.
What are Tectal neurons?
The tectal neuropil contains structures including periventricular neurons axons and dendrites. The neuropil also contains GABAergic superficial inhibitory neurons located in stratum opticum.
What are pituitary tumors and how do they affect the body?
Pituitary tumors are abnormal growths that develop in your pituitary gland. Some pituitary tumors result in too many of the hormones that regulate important functions of your body. Some pituitary tumors can cause your pituitary gland to produce lower levels of hormones. Most pituitary tumors are noncancerous (benign) growths (adenomas).
What are the treatment options for pituitary tumors?
Two types of drugs are available for these types of pituitary tumors and are especially useful if surgery has been unsuccessful in normalizing growth hormone production.
How do pituitary tumors cause diabetes insipidus?
Large tumors can sometimes press on the posterior (back) part of the pituitary, causing a shortage of the hormone vasopressin (also called anti-diuretic hormone or ADH). This can lead to diabetes insipidus.
Where is the quadrigeminal plate located?
The quadrigeminal plate , also known as the tectal plate or tectum, is constituted by the superior and inferior colliculi. The tectum is the dorsal portion of the midbrain ( brainstem ), located posteriorly to the mesencephalic aqueduct.