Most cystic lesions of the major salivary gland are cystic neoplasms. Benign cysts are epithelial lined cavities usually containing fluid or semisolid material, incidence is 2-5%. Benign cysts of the salivary gland are classified into three types: a) Lymphoepithelial cysts b) Salivary duct cysts c) Dysgenetic cysts a) Lymphoepithelial cyst Bernier and Bhaskar introduced the term lymphoepithelial cysts to stress that it is not an embryologic remnant. Lymphoepithelial cysts are considered distinct entities from the lymphoepithelial lesions. Usually there is a well circumscribed, asymptomatic mass in the superficial portion of the gland.
Hispathology The pathological characteristic or features of Angiocentric Glioma are quite similar to other types of brain tumors such as astrocytomas and ependymomas. Yet, their occurrences are rare in cases and this make accurate diagnosis difficult. In general, Angiocentric Glioma is demonstrating an angiocentric pattern and it composed of diffusely infiltrating, monomorphic, bipolar spindle cells which is arranged in around blood vessels in concentric sleeves and pseudorosettes. Plus, the immunohistochemical staining result for this tumor is typically positive mostly for glial fibrillary acidic protein.
Essay 89: Pituitary Gland Function The pituitary gland is a pea sized region of specialized endocrine cells and neurons located behind the optic chiasm and enclosed in a bony structure called the sella turcica, or Turkish saddle. Although the pituitary is often called the “master gland” of the endocrine system, that label is more appropriate for an adjacent area of brain known as the hypothalamus. As 19th century scientists deciphered the anatomy and physiology of the central nervous system and endocrine glands, the role of the pituitary gradually became clear.
Aside from producing detailed images of the body, an MRI can measure the tumor’s size. To help create a clearer picture, a special dye called a contrast medium is given before the scan. It can be injected to the patient’s vein or given as a pill to swallow. MRIs create more detailed pictures than CT scans, which are three-dimensional pictures of the inside of the body with an x-ray machine (ACSO). Unlike most cancers, Brain cancer does not use a staging system to describe there tumor.
ENDOCYTOSIS Endocytosis is a process by which a small region of the plasma membrane of a cell ivaginates to form a new intracellular vesicle. The plasma membrane ivagination is termed caveolae and the caveolin is a protein which lines the caveolae. The central role of endocytosis is well exhibited in receptor regulation, neurotransmitters and the delivery of drugs and also endocytosis can be in other forms which are pinnocytosis and phagocytosis (Liang et al., 2010). With respect to receptor-mediated endocytosis, a specific receptor on the cell surface binds to the extracellular molecule (Ligand).
The lymphatic system is the system of the bodyâ€™s tissues which are permeated by a network of capillaries which contain blood. Apart from leukocytes these sometimes leave the capillaries through fine walls which mean that the blood does not come into direct contact with the tissues and the fluid in which it is bathed is known as the tissue fluid. This means that from the tissue spaces the tissue fluid passes into the narrow vessels which are known as lymphatic vessels. This then unites to form channels that then rejoin the general circulation. This means that the name lymph is given to the tissue fluid when it enters the lymphatic vessels.
Your brain and your spinal cord are apart of this and that also happens to be the definition of the system. With your brain, there are three sections of it. You have the hindbrain which is the part of the brain that contains the medulla, pons, and cerebellum and it is responsible for keeping our body operating. The next section is the midbrain and it is the connection between the hindbrain and forebrain. It is the center for the eyes and ears and reticular formation is the main key here.
Cellular integrity, in turn, prevents errors that arise from DNA replication, cellular metabolism, and carcinogenic exposure. These exposures consist of ultraviolet light, radiation, or damaging chemical substances. Many professionals believe that tumor initiation and following progression result from acquired genomic alteration within normal cells. The populations of tumor cells appear to be more unstable genetically than normal unaltered cells. Genomic instability causes individuals to maintain shorter cell cycles and also causes the bypassing of intracellular and immunological control systems.