Brain Tumours: Early Symptoms, Diagnosis, and Rising Awareness in India

Brain Tumours: Early Symptoms, Diagnosis, and Rising Awareness in India

A brain tumour is an abnormal growth of cells within the brain or its immediate surroundings. These growths can be either benign (non-cancerous) or malignant (cancerous), but both types can pose serious health risks due to the confined space of the skull. The impact of a brain tumour depends on its size, location, and rate of growth, influencing vital brain functions. Recognising early symptoms is crucial for timely diagnosis and intervention, which significantly affects treatment outcomes. In India, there has been a noticeable increase in public awareness campaigns and diagnostic capabilities, leading to earlier detection of brain tumours, a trend often highlighted around observances like World Brain Tumour Day.

History and Background

The understanding of brain tumours has evolved significantly throughout medical history. Early civilisations had limited knowledge, often attributing neurological symptoms to supernatural causes. Ancient Egyptian medical texts, such as the Edwin Smith Papyrus (circa 1600 BCE), describe head injuries but do not explicitly detail brain tumours. Hippocrates, in ancient Greece, and later Galen, observed various ailments affecting the head and brain, yet a clear differentiation and understanding of intracranial masses remained elusive for centuries.

The modern era of neurosurgery and neuropathology began to take shape in the 19th century. Advances in microscopy allowed for the detailed study of brain tissue, leading to the classification of different tumour types. Pioneers like Rudolf Virchow contributed significantly to cellular pathology, laying the groundwork for understanding neoplastic growths. The late 19th and early 20th centuries saw the development of surgical techniques for brain tumour removal, largely spearheaded by figures such as Harvey Cushing, considered the father of modern neurosurgery. Cushing's work not only refined surgical approaches but also improved survival rates and established a systematic classification of brain tumours.

In India, the development of neurosurgery and oncology began to gain momentum in the mid-20th century, particularly after independence. The establishment of premier medical institutions and the training of specialists abroad, followed by their return, helped build the foundational infrastructure for diagnosing and treating complex neurological conditions. Over the past few decades, advancements in medical imaging technologies, such as MRI and CT scans, have revolutionised diagnosis, making it possible to detect tumours at earlier stages. Concurrently, public health initiatives and medical awareness campaigns have played an increasingly vital role in educating the Indian populace about brain health and the importance of symptom recognition.

Key Aspects

What are Brain Tumours?

Brain tumours are masses of abnormal cells that grow in the brain. They can be classified in several ways:

• Primary Brain Tumours: These originate within the brain itself. They can be benign (non-cancerous) or malignant (cancerous). Common types include gliomas (astrocytomas, oligodendrogliomas, ependymomas), meningiomas, pituitary adenomas, and schwannomas.
• Secondary (Metastatic) Brain Tumours: These are cancerous tumours that have spread to the brain from a primary cancer located elsewhere in the body, such as the lung, breast, colon, or skin. These are always malignant.

The exact causes of most primary brain tumours are not fully understood. However, certain risk factors have been identified, including exposure to high doses of radiation, genetic syndromes (e.g., Neurofibromatosis, Tuberous Sclerosis), and a weakened immune system. It is important to note that having a risk factor does not guarantee tumour development, and many individuals with brain tumours have no known risk factors.

Early Symptoms

Recognising the early symptoms of a brain tumour can be challenging, as many initial signs are non-specific and can be mistaken for more common, less serious conditions like stress or migraines. However, persistent, worsening, or new-onset symptoms, especially when combined, warrant medical evaluation. Key early symptoms often missed include:

• Headaches: While common, brain tumour headaches often differ. They may be new or change in pattern, become more frequent or severe, worsen with activity or in the morning, and may not respond to usual pain relievers. They can be dull, persistent, or throbbing.
• Seizures: A new-onset seizure in an adult without a history of epilepsy is a significant red flag. Seizures can manifest as convulsions, muscle jerking, staring spells, or brief periods of confusion.
• Vision Problems: This can include blurred vision, double vision (diplopia), loss of peripheral vision, or sudden blindness in one eye. These can be due to pressure on the optic nerves or brain regions controlling vision.
• Nausea and Vomiting: Especially if persistent and unexplained by other conditions, and often occurring in the morning. This can be a sign of increased intracranial pressure.
• Changes in Cognitive Function or Personality: Difficulties with memory, concentration, problem-solving, confusion, or changes in mood, behaviour, or personality (e.g., increased irritability, apathy, depression) can indicate a tumour affecting specific brain regions.
• Weakness or Numbness: Gradual weakness or numbness on one side of the body, difficulty with balance, coordination, or walking (ataxia), can result from tumours affecting motor pathways.
• Speech Difficulties: Trouble finding words (aphasia), slurred speech (dysarthria), or difficulty understanding language.
• Hearing Problems: Ringing in the ears (tinnitus) or hearing loss, particularly on one side, can indicate tumours affecting auditory pathways or nerves.

It is crucial to remember that these symptoms can also be caused by many other conditions. However, their persistence, progression, or unusual nature should prompt immediate medical consultation with a neurologist.

Diagnosis

The diagnostic process for a brain tumour typically involves several steps:

• Neurological Examination: A doctor will assess vision, hearing, balance, coordination, strength, and reflexes to identify affected areas of the brain.
• Imaging Tests:
  • Magnetic Resonance Imaging (MRI): The most common and detailed imaging test for brain tumours, using powerful magnets and radio waves to create detailed images of the brain.
  • Computed Tomography (CT) Scan: Uses X-rays to create cross-sectional images of the brain, often used in emergency situations or if MRI is contraindicated.
  • Positron Emission Tomography (PET) Scan: Can help determine the metabolic activity of a tumour and differentiate between active tumour tissue and scar tissue.
  • Angiogram: A special X-ray that visualises blood vessels in the brain, useful for planning surgery.
• Biopsy: The definitive diagnostic procedure. A small sample of the tumour tissue is removed (either during surgery or with a needle biopsy) and examined under a microscope by a neuropathologist to determine its type and grade.
• Blood and Urine Tests: May be conducted to rule out other conditions or to detect tumour markers in certain types of tumours.

Treatment Options

Treatment for a brain tumour depends on its type, size, location, and the patient's overall health. Common approaches include:

• Surgery: The primary treatment for many brain tumours, aiming to remove as much of the tumour as safely possible while preserving brain function.
• Radiation Therapy: Uses high-energy rays to kill tumour cells. Can be external beam radiation or stereot