Are you concerned about a brain tumor diagnosis for you or a loved one? Or do you simply want to learn more about diagnosis and treatment options?
On this page, we explore what is a brain tumor, benign and malignant tumors, classification of brain tumors, what are the risk factors for brain tumors, what are the symptoms of brain tumors, diagnostic methods such as neurological examination, CT, MRI, biopsy, etc. We also look into the latest treatment options such as surgical treament, radiotherapy, radiosurgery, chemotherapy and hormone therapy.
Not all brain tumors are cancerous. Brain tumors are categorized into two groups: benign and malignant.
1.No cancerous cell is found in benign brain tumors:
2.Malignant tumors have cancerous cells:
In some cases, malignant tumors do not metastasize or invade healthy tissues. Tumor may be confined to a tissue layer, scalp or any other structure in the cranium; this type of tumor is referred as “encapsulated tumor”.
Brain tumors are classified incrementally (from stage one to stage four). Stage of a tumor points out how cancer cells appear under microscope. Cells of high-stage tumors appear more unusual and multiply more rapidly than cells of low-stage tumors.
Primary Brain Tumors
Tumors originating from brain tissue are referred as primary brain tumor. Primary brain tumors are classified by the cells they originate from or the brain region.
Secondary Brain Tumors
Cells of a malignant tumor that is located in any tissue or organ of the body can spread to brain through the blood circulation, resulting in formation of a new tumor there. Such tumors are referred as secondary brain tumor or metastatic brain tumor.
Brain Tumors: Who are at risk?
Following factors are linked to increased risk of primary brain tumors:
Symptoms of brain tumors vary depending on diameter, type and location of the tumor. Symptoms are manifested due to nerve ends compressed by the tumor, damaged brain tissue or accumulation of fluid in the scalp secondary to enlargement of the tumor. Most common symptoms of brain tumors are as follows:
However, those symptoms are not specific to brain tumors or they may point out another health problem. Seeking medical attention immediately in the presence of these symptoms is very important for early diagnosis and treatment.
Following methods are used to diagnose tumor cells:
Surgeons use three methods to examine tumor cells:
Surgery, radiotherapy or chemotherapy are treatment methods and these methods are chosen depending on type, stage and class of the tumor. A combination of those methods may be required for some patients.
In addition, patients may joint to special therapy programs at any stage of the disease in order to manage pain and symptoms of cancer and to cope with side effects and emotional burdens of the treatment. Such therapies are referred as “symptom management”, “supportive care” or “palliative care”.
Surgical treatment: Surgery is a treatment modality that is commonly used for brain tumors. Neurosurgeons open the skull with a procedure known as craniotomy.
Radiotherapy: Radiotherapy uses high-energy beams to damage cancer cells and to prevent multiplication thereof or destroy them. These rays include X-ray, gamma rays or protons. The tumor and the nearby tissues are irradiated. In some cases, whole brain or the spine can be irradiated.
Radiosurgery; radiosurgery is a medical procedure that utilizes a non-invasive method to treat benign and malignant tumors. If radiosurgery is used to treat brain lesions, it is also referred as stereotactic radiotherapy (SRT). Radiosurgery implies inactivating intracranial and extracranial tumors and lesions that are not appropriate for open surgery by delivering high-dose ionizing radiations to a focused target. Radiosurgery is reserved for patients, for whom conventional surgery is difficult or not recommended due to a tumor in close proximity to artery, nerve or other vital structures. Radiosurgery is usually applied in one session and its effects on the target can be as sharp as that of surgery. Exposure of healthy tissues to radiation is minimized by three dimensional computer-assisted planning and high immobilization.
Chemotherapy: Chemotherapy means killing cancer cells by medications. This method is occasionally used in treatment of brain tumors and medications can be administered by oral or intravenous routes. Whatsoever the administration route, the active substance is released to the blood circulation and circulates throughout the body. Medications are usually administered in cycles or courses and treatment periods are followed by recovery periods.