Brain tumor diagnosis
Most brain cells are separated from the blood stream through the blood-brain barrier (BBB), which prevents the entry of all vehicles or substances in the blood to the brain. Therefore the transmission of the tumor to the brain only in the case of a defect in the blood-brain barrier. Which can be detected by magnetic resonance imaging and computed tomography, and the main index for the diagnosis of malignant gliomas, meningiomas, and brain Alanaathat considered.
Despite
the lack of specific clinical symptoms of brain tumors, the presence of
a range of symptoms and the absence of clinical indicators for
infections or other can be a pointer to the possibility of the presence
of intracranial tumors. May
be difficult to diagnose these tumors because they differ from the rest
of the body tumors, however they behave distinctive depending on the
location. Diagnosis will often by taking a medical history, referring to the medical history, current symptoms. According to the clinical and laboratory investigations to exclude infections that may be the cause of the symptoms. The tests can be at this stage include the eyes, Otolaryngology (or ENT) and electrical Vhsosat to brain waves. And the use of electrical (EEG) often plays a role in the diagnosis of brain tumors. Swelling
or hinder the passage of cerebrospinal fluid (CSF) of the brain (early)
may cause signs of increased intracranial pressure which translates
clinically into headaches, vomiting, or a change in the state of
consciousness, either in children change their minds Qatar skull and
bulging fontanelle. When
you get the most complicated symptoms such imbalances endocrine doctors
should pay attention not to the exclusion of brain tumors.
Visual
binary field defect (because of the pressure on the optic chiasm), or
the expansion of the pupil, or the occurrence of any evolved slowly or
sudden onset of neurological symptoms, such as cognitive impairment and
behavior (including poor judgment, memory loss, inability to identify
and excellence, disorders of orientation spatial),
personal changes or emotional changes, hemiparesis, hypoesthesia,
aphasia, ataxia, weakness of the visual field, poor sense of smell, and
hearing loss, facial paralysis, double vision, or more severe symptoms
such as tremors, paralysis on one side such
as paraplegia of the body, or (epilepsy) in a patient with no history
of epilepsy, it should raise the possibility of a brain tumor.
Photography
Medical imaging plays a pivotal role in the diagnosis of brain tumors. Has
been abandoned dangerous the old ways, such as brain imaging injected
gas and cerebral angiography and replaced by high-resolution techniques,
magnetic resonance imaging (MRI) and computed tomography imaging
(computed tomography) scans. Tumors often will appear colorful and different for a doctor (also referred to as operations) in the results of CT or MRI. • benign brain tumors often appear as darker than normal brain tissue on a CT scan (CT). But
the MRI, they appear either dark or with the same intensity as in the
brain tissue on T1-weighted scans, or (brighter than brain tissue)
T2-weighted scans, although the appearance of a variable.µ
• When the brain uptake of chemicals called (contrast) agents, can detect most of the primary brain tumors and secondary tumors (malignant metastatic) in any of the X-CT or MRI.
•
pressure areas where pressure on the brain tissue of the tumor was
vividly shown on the T2-weighted scans, and may indicate the presence of
a tumor is widespread because of the non-visible surrounding the tumor
border. The presence of the bulge of fluid around the tumor, known as edema surrounding the tumor, which may show a similar result. This is because these tumors disrupt the normal traffic of the BBB and lead to increased permeability. However, it is not possible to diagnose high grade gliomas of low-grade glial tumors based on the consolidation pattern only. You
can confirm the final diagnosis of a brain tumor just by histological
examination of tumor tissue samples obtained either by brain biopsy or
open surgery. Histological examination is necessary to determine the appropriate treatment and proper diagnosis. This
examination, performed by a pathologist, is in three stages: during the
screening process of new tissue, the initial microscopic examination of
the tissues of the stomach, and the follow-up examination of the
stomach tissue after histological immune or genetic analysis of the
chemical examination.