Brain tumor (A silent killer)

 Awareness and prevention series
A brain tumor is an intracranial solid neoplasm, a tumor (defined as an abnormal growth of cells) within the brain or the central spinal canal.
Brain tumors include all tumors inside the cranium or in the central spinal canal. They are created by an abnormal and uncontrolled cell division, normally either in the brain itself (neurons, glial cells (astrocytes, oligodendrocytes, ependymal cells, myelin-producing Schwann cells), lymphatic tissue, blood vessels), in the cranial nerves, in the brain envelopes (meninges), skull, pituitary and pineal gland, or spread from cancers primarily located in other organs (metastatic tumors).

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Brain Tumor Awareness Ribbon Round Mouse Pad
Brain Tumor Awareness Ribbon Mouse Pad

Primary brain tumors

Primary neoplasms of the brain are tumors that originate in the intracranial sphere or the central spinal canal, based on the organic tissues that make up the brain and the spinal cord. From the brain-lemma we can learn a lot of things about the composition of the brain from different types of organic tissues. For the purpose of this article we will discuss only some types.

• The brain itself is composed of neurons and glia (that function primarily as the physical support for neurons). The neuron itself is rarely the basis for a tumor, though tumors of the glial cells are glioma and often are of the cancerous type.
• The brain is surrounded by a system of connective tissue membranes called meninges that separate the skull from the brain. Tumors of the meninges are meningioma and are often benign neoplasms.
• Below the brain is pituitary and pineal gland which could be the basis for its own -albeit rare- kind of benign glandular neoplasms.

Secondary brain tumors

Secondary tumors of the brain are metastatic tumors that invaded the intracranial sphere from cancers primarily located in other organs. This means that a (malignant) cancerous neoplasm has developed in another organ elsewhere in the body and that cancer cells leak from that primary tumor. The leaked cells enter the lymphatic system and blood vessels, circulate through the bloodstream, and are deposited (stranded in the small blood vessels in the brain) within normal tissue elsewhere in the body, in this case in the brain. There these cells continue growing & dividing and become another invasive neoplasm of the primary cancers tissue. Secondary tumors of the brain are very common in the terminal phases of patients with an incurable metastased cancer , most common types of cancers that bring about secondary tumors of the brain are lung cancer, breast cancer and malignant melanoma (skin cancer), kidney cancer and cancer of the colon (in decreasing order of frequency).
 Nutricology/Allergy Research Group - Brainwave Plus - 120 Caps
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