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Sunday, 17 February 2013

Cancer Types

Source(google.com.pk)
Cancer Types Biography
Oncologist Siddhartha Mukherjee was treating one of his patients, a woman with advanced abdominal cancer who had relapsed multiple times, when she asked him what seemed like a simple question.

"She said, 'I'm willing to go on, but before I go on, I need to know what it is I'm battling,' " Mukherjee tells NPR's Terry Gross.

But, as Mukherjee explains, describing his patient's illness wasn't so simple. Defining cancer, he says, is something doctors and scientists have been struggling to do since the disease's first documented appearance thousands of years ago.
"Cancer is not just a dividing cell," he says. "It's a complex disease: It invades, it metastasizes, it evades the immune system. So there are many, many other stages of [defining] cancer which are still in their infancy."

Mukherjee's new book, The Emperor of All Maladies: A Biography of Cancer, grew out of his desire to better understand the disease he treats, through examining the way cancer has been described and treated throughout history. He chronicles the ways therapies evolved, particularly in the 20th century, as more treatment options became available and scientists worked to understand the underlying genetic mutations that caused the disease.

"If there's a seminal discovery in oncology in the last 20 years, it's that idea that cancer genes are often mutated versions of normal genes," he says. "And the arrival of that moment really sent a chill down the spine of cancer biologists. Because here we were hoping that cancer would turn out to be some kind of exogenous event — a virus or something that could then be removed from our environment and our bodies and we could be rid of it — but [it turns out] that cancer genes are sitting inside of each and every one of our chromosomes, waiting to be corrupted or activated."

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Siddhartha Mukherjee is a staff oncologist at Columbia University Medical Center.

Deborah Feingold via Scribner
As the genetic understanding of cancer evolves, Mukherjee says, oncologists will be able to integrate that knowledge to develop more targeted treatment options — particularly as they find commonalities between different types of cancer.

"A breast cancer might turn out to have a close resemblance to a gastric cancer," he says. "And this kind of reorganization of cancer in terms of its internal genetic anatomy has really changed the way we treat and approach cancer in general."

Dr. Siddhartha Mukherjee is an assistant professor of medicine at Columbia University and a staff cancer oncologist at Columbia University Medical Center. His articles have been published in Nature, The New England Journal



Friday, 15 February 2013

About Brain Cancer

Source(google.com.pk)
About Brain Cancer
Brain tumors are not rare.  Each year more than a 100,000 Americans will be diagnosed with a primary brain tumor or metastatic (secondary) brain tumor. Being diagnosed with a brain tumor can cause shock, fear, and confusion. For most people, having a brain tumor raises a lot of questions about what to do, where to go, and how to find the most comprehensive care. Dr. Sperduto and his expert team are here to help. From diagnosis to treatment, our experienced, concerned team of experts specializes in the comprehensive care of brain tumors.
The brain is the most important organ in the body.  It controls the five senses as well as the ability to speak and move.  In this section you will find a brief introduction to: brain anatomy,brain tumors, the diagnosis of brain tumors, and a description of the different types of brain tumors.
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BRAIN ANATOMY 
Central Nervous System (CNS): Your CNS consists of the brain and spinal cord.
Brain Stem: Connects your brain with your spinal cord and controls your breathing and heart rate.
Cerebral Cortex: Involved in your thinking, learning and speaking activities.

Cerebellum: Like a mini-brain within your brain, your cerebellum allows you to carry out skilled, complicated movements, including balance. 

Cerebrospinal fluid: Protects your brain and spinal cord by acting as a shock absorber.

Cerebrum: The largest and uppermost portion of your brain. It consists of the right and left hemispheres, which control thoughts and conscious action. 

Corpus Callosum: Connects the two hemispheres of your brain and allows both sides to communicate. For example, when your right hand holds an object, your left hand knows it. 

Hypothalamus: Regulates areas for thirst, hunger, body temperature, water balance, blood pressure and links the nervous system to the endocrine system.

Thalamus: Egg-shaped area that helps you process and recognize information about touch, pain, temperature and pressure on your skin. 
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer
About Brain Cancer

About Brain Cancer

Treatment Of Brain Cancer

Source(google.com.pk)
Treatment Of Brain Cancer 
Treatment methods for brain cancer:
Curing the brain cancer depends on the extension level of the tumor and the place it’s localized. If it’s possible, some brain tumors are treated in a surgical manner, the tumor is removed and the curing is complete. Chemotherapy and radiotherapy prescribed after the operation help to totally destroy the cancerous cells that remained isolated.

In case of brain tumors that have been affecting in a profound manner some areas of the brain, the treatment consists in chemotherapy and radiotherapy, which eliminate the tumor through laser, because the extirpation of the tumor on a surgical method can provoke serious cerebral lesions. In this case the curing is not assured; it can only slow the developing of the cancerous cells, prolonging the life of the sick person.

Meningiomas are forms of tumors that form from the membrane which covers and protects the brain, are benign and can be surgically extirpated. Glioblastomas is another type of tumors, malign, that are born right from the brain tissue and cannot be operated. In serious situations when the curing is impossible, the doctors will try to create a state of comfort for the patient and keep the neurological functions alive, administrating drugs (anticonvulsants, analgesics, corticosteroids) which have the role of reducing the edema, control and ameliorate the pains. The therapies for physical rehabilitation are indicated for the patients for whom the tumors provoked residual brain lesions.

There are also accepted a series of alternative therapies which ameliorate a bit the symptoms of this disease: hydrotherapy, yoga, therapeutic touch, meditation, biofeedback, some methods of reflecting, etc.

The researchers from the National Health Institution are studying a new type of therapy, through which they wish to destroy the cancerous cells at the brain level by modifying their genetics. In this way, through foreign genes, if the result of the tests will be positive, they will realize the most efficient method of treating the brain cancer.

The innovation of this idea consists in the fact that the cancerous cells will be vulnerable for a drug that leads to their destruction, but leaves the healthy cells unaffected and intact. By testing this therapy for humans, for 5 from 8 patients the cancerous tumor has been significantly reduced. Testing this therapy on rats, 11 from 14 animals got entirely rid of the tumors. Nowadays there are necessary many supplementary tests, but the new genetic therapy is very promising on the future market
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Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer
Treatment Of Brain Cancer

Brain Cancer Treatment

Source(google.com.pk)
Brain Cancer Treatment
Brain tumors can be malignant (cancerous) or benign (non cancerous). Treatment options for brain tumor should be individualized based on age, health and size, location and type of the tumor. Treatment for brain cancer is complex that it involves cumulative effect of team of doctors including neurosurgeons, oncologists, and radiation oncologists apart from primary health care providers.

Various treatment options available for brain cancer are,
Surgery: Surgical removal is the usual first treatment for most brain tumors. Many tumors except some at the skull base can be successfully removed. Any person undergoing brain surgery may suffer from epileptic seizures and medication is prescribed to minimize or eliminate the occurrence of seizures.

Stereotactic radiosurgery is a new technique to destory brain tumor using high energy radiation without opening the skull. There are various types of stereotactic radiosurgeryand the advantages of stereotactic radiosurgery is that it has fewer complications with a shorter recovery time.
Radiation: It is a localized therapy to selectively destroy tumor cells. It may be used for people who can not undergo surgery. In some cases it is used after surgery to kill any tumor cells that may remain. Radiation can be given externally or internally.

External radiation uses a high-energy beam of radiation that travels through the skin, the skull, healthy brain tissue, and other tissues to get to the tumor. The process is repeated for a total of 10-30 treatments depending on the type of tumor.
Internal or implant radiation uses a tiny radioactive capsule that is placed inside the tumor itself.
Chemotherapy: Chemotherapy uses drugs to treat tumor. It is often used in young children instead of radiation, as radiation may affect the developing brain. The toxicity and many side effects of the drugs holds back this treatment option in comparison to surgery and radiation therapy
Clinical Trials: Clinical trials are another treatment option for brain cancer, as new therapies are being developed all the time. Clinical trials offer new therapies that may be more effective than the existing one. Many people with cancer are eligible for clinical trials. Check out list of clinical trials for brain tumor currently recruiting here.

A brain tumor or treatment can lead to other health problems and you need to receive supportive care to prevent these hurdles.
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Brain Cancer Treatment
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Brain Cancer Treatment

Cancer Symptoms

Source(google.com.pk)
Cancer Symptoms
Since prevention is one of the most important cancer-fighting tools, it is important that cancer be detected as early as possible before it spreads.
Telltale Signs of Cancer include:  A lump or thickening in the breast or testicles; a change in a wart or mole; a skin sore or a persistent sore throat that doesn't heal; a change in bowel or bladder habits; a persistent cough or coughing blood; constant indigestion or trouble swallowing; unusual bleeding or vaginal discharge; and chronic fatigue.

If you notice any of these symptoms, you should see a physician for testing.  We also have a web page that lists some of the tests that are available to detect cancer.

The following are symptoms that may occur in specific types of cancers:

Bladder cancer: Blood in the urine, pain or burning upon urination; frequent urination; or cloudy urine

Bone cancer: Pain in the bone or swelling around the affected site; fractures in bones; weakness, fatigue; weight loss; repeated infections; nausea, vomiting, constipation, problems with urination; weakness or numbness in the legs; bumps and bruises that persist

Brain cancer: Dizziness; drowsiness; abnormal eye movements or changes in vision; weakness, loss of feeling in arms or legs or difficulties in walking; fits or convulsions; changes in personality, memory or speech; headaches that tend to be worse in the morning and ease during the day, that may be accompanied by nausea or vomiting

Breast cancer: A lump or thickening of the breast; discharge from the nipple; change in the skin of the breast; a feeling of heat; or enlarged lymph nodes under the arm

Colorectal cancer: Rectal bleeding (red blood in stools or black stools); abdominal cramps; constipation alternating with diarrhea; weight loss; loss of appetite; weakness; pallid complexion

Kidney cancer: Blood in urine; dull ache or pain in the back or side; lump in kidney area, sometimes accompanied by high blood pressure or abnormality in red blood cell count

Leukemia: Weakness, paleness; fever and flu-like symptoms; bruising and prolonged bleeding; enlarged lymph nodes, spleen, liver; pain in bones and joints; frequent infections; weight loss; night sweats

Lung cancer: Wheezing, persistent cough for months; blood-streaked sputum; persistent ache in chest; congestion in lungs; enlarged lymph nodes in the neck

Melanoma: Change in mole or other bump on the skin, including bleeding or change in size, shape, color, or texture

Non-Hodgkin's lymphoma: Painless swelling in the lymph nodes in the neck, underarm, or groin; persistent fever; feeling of fatigue; unexplained weight loss; itchy skin and rashes; small lumps in skin; bone pain; swelling in the abdomen; liver or spleen enlargement

Oral cancer:  A lump in the mouth, ulceration of the lip, tongue or inside of the mouth that does not heal within a couple of weeks; dentures that no longer fit well; oral pain, bleeding, foul breath, loose teeth, and changes in speech

Ovarian cancer: Abdominal swelling; in rare cases, abnormal vaginal bleeding; digestive discomfort

Pancreatic cancer: Upper abdominal pain and unexplained weight loss; pain near the center of the back; intolerance of fatty foods; yellowing of the skin; abdominal masses; enlargement of liver and spleen

Prostate cancer: Urination difficulties due to blockage of the urethra; bladder retains urine, creating frequent feelings of urgency to urinate, especially at night; bladder not emptying completely; burning or painful urination; bloody urine; tenderness over the bladder; and dull ache in the pelvis or back

Stomach cancer: Indigestion or heartburn; discomfort or pain in the abdomen; nausea and vomiting; diarrhea or constipation; bloating after meals; loss of appetite; weakness and fatigue; bleeding - vomiting blood or blood in the stool

Uterine cancer: Abnormal vaginal bleeding, a watery bloody discharge in postmenopausal women; a painful urination; pain during intercourse; pain in pelvic area














Tuesday, 12 February 2013

Dialysis


Source(google.com.pk)
Dialysis Biography

dialysis (dĪălˈĭsĭs) [key], in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane. Strictly speaking, dialysis refers only to the transfer of the solute; transfer of the solvent is called osmosis. Dialysis is frequently used to separate different components of a solution. For example, a solution of starch and sodium chloride in water can be separated by placing the mixture in a vessel on one side of a semipermeable membrane and placing pure water on the other side. The smaller particles of sodium chloride (which dissolve in water to form sodium and chloride ions) will diffuse across the membrane; diffusion of the much larger starch particles (which are not truly in solution but are in colloidal suspension) is hindered and may be completely prevented. By continuously or periodically replacing the solvent with fresh solvent, almost all of the sodium chloride can be removed. The method was originated by Thomas Graham, who termed the substance that remained within the membrane a colloid and the substance that diffused a crystalloid.
An extension of the method makes possible the separation of mixed colloids by the use of a semipermeable membrane (usually synthetic) of known selectivity, i.e., one that will permit the diffusion of one colloid and hinder the diffusion of others. Mixed macromolecules, such as proteins, may be similarly separated. By the use of graded semipermeable membranes chosen to allow successively smaller molecules to pass, mixtures can be separated into components of graded ranges of molecular weight.

Monday, 11 February 2013

Kidney Transplantation

Source(google.com.pk)
Kidney Transplantation Biography
An organ transplant is the transferring of an organ from the donor's body to the patient’s body in place of receivers absent or damaged organ to activate it again. There are three types of grafting process which are applied during organ transplantation. If the organs or tissues are taken from the same patient’s body to which it will be transplanted, this grafting process is called auto graft. If the organs or tissues are taken from the donor's body into the patient’s body within same species, this grafting process is called allograft. If the donor is selected from different species of the receiver, this grafting process is called Xenograft.
The donor may be living or not in allograft process. If the donor is not living then it has a specific time limit before damaging the transplanting organs or tissues. Organs which are usually transplanted widely are liver, pancreas, kidneys, lungs, intestines etc. Tissues are collected from special parts of the body such as skins, veins, bones, cornea, and heart valves etc. kidney is the most usual organ which is transplanted for worldwide purposes.

In case of living donor, brain must be dead. For that reason parts of the brain which regulate breathing and heart beat are collapsed during transplantation. Breathing and heartbeat is controlled by artificial system for that time. But that is a tough job for the doctors. Because every patient does not have same capability to maintain breathing by artificial means. They go through the path of death. So it must be ensured that weak donor's are rejected as much as possible.

Tissues are collected from the donor within 24 hours through temporary cessation of their cardiac system. But the collected tissues from any organ except corneal tissues can be preserved or stored for at least five years. It is obviously good news for everybody. Those preserved tissues are found from the organ bank when we need them. Government has its strict regulation for the safety of proper organ transplantation. Otherwise, communicable diseases are spread out over generation to generation.

Most of the times living donor's are relatives or near and dear ones of the patient. Emotional matters are very much effective over the risks of the donor’s life. Psychologically they are strong in those cases. Donors have no concern about their own life but they want to save the life of their nearest people. So doctors should be concerned about those cases that they must not accept that types of donors which are not physically fit. Paired exchange is done by stereotyping for the living donor.

It is a compatibility test procedure between donor and receiver. Cross matching and blood incompatibility are identified by this technology. Sometimes donors are inspired to give their organs or body parts by attractive amount of money. This is unethical and unexpected matter for modern science. Transplantation medicine is a gainsaying area of modern science. Transplant rejection may occur in the patient’s body. Sometimes the immune system of the patient’s body works against transplanting body parts. In this case the transplanting organ is removed from the patient immediately. Organ transplantation brings happiness to many people by transplanted getting a new organ and a new life.