Brain Tumor in Adults: Early Symptoms, Types, and Causes

Brain tumors are serious, and the worst part about it is that you don't know you have it in the early stages. They grow slowly and quietly, causing subtle disruption until they’ve already altered function. Some type of brain tumors announces themselves early, but the symptoms are so vague that they're misread or dismissed.  

What makes them particularly difficult is their variation in speed or severity, but the fact that, in most cases, the cause is either unknown or entirely unpreventable. This lack of clarity makes early awareness even more important. Let's understand in detail the various symptoms of brain tumors, their types, and causes. 

What Are the Symptoms of a Brain Tumor? 

Brain tumor symptoms are not the same for all. It varies widely depending on the tumor’s size, location, and growth rate. Let’s take a closer look at it: 

Common Early Indicators: 

• Recurring morning headaches 
• Worsening head pain when coughing, sneezing, or bending forward 
• Episodes of nausea that are not linked to food or illness 
• Subtle shifts in behavior, personality, or emotional responses 
• Trouble concentrating on familiar tasks 
• Forgetfulness or mental fog during routine interactions 
• Feeling unusually tired during the day, despite a full night’s rest 

Progressive or Advanced Signs 

• New-onset seizures without a prior epilepsy diagnosis 
• Numbness or reduced strength in the arms or legs 
• Slurred speech or trouble recalling common words 
• Double or blurry vision due to pressure on the visual centres 
• Dizziness or clumsiness if the tumor impacts balance 
• Difficulty with swallowing, chewing, or facial muscle control 
• Hearing loss or ringing in the ears when the auditory nerves are involved 

As these symptoms can be subtle or overlap with other conditions, it is crucial to seek evaluation for these neurological changes. 

What Are the Types of Brain Tumors? 

Brain tumors are classified based on the type of cells they arise from. It can be malignant or benign. Let’s take a look at the different types of brain tumors: 

• Gliomas originate in supportive glial cells of the brain. These include types like astrocytomas, oligodendrogliomas, and glioblastomas. Glioblastoma multiforme is particularly fast-growing and aggressive. 
• Meningiomas develop from the protective membranes surrounding the brain and spinal cord. While usually benign, their growth can disrupt brain function depending on location. 
• Pituitary Adenomas form in the pituitary gland and disrupt hormone levels. Larger tumors press on nearby nerves and affect vision. 
• Medulloblastomas are more commonly seen in children who begin in the cerebellum and quickly affect balance and coordination. 
• Schwannomas develop from nerve sheath cells and interfere with hearing and balance, especially the vestibular schwannoma (also called acoustic neuroma). 
• Metastatic Brain Tumors begin in other parts of the body (e.g., lungs, breasts) and spread to the brain. These secondary tumors often appear in multiples and require specific oncologic management. 

What Causes Brain Tumors? 

In most cases, the exact cause of a brain tumor is unknown. However, several factors can increase the risk: 

• Genetic syndromes like neurofibromatosis, Li-Fraumeni syndrome, and von Hippel-Lindau disease predispose some individuals to tumor formation. 
• Past exposure to ionising radiation from prior cancer treatments can increase long-term brain tumor risk. 
• The likelihood of developing certain brain tumors increases with age, although some childhood-specific types also exist. 
• A close relative with a history of brain tumors or certain cancers raises your own risk slightly. 

There is currently no scientific consensus linking brain tumors to lifestyle habits, diet, or mobile phone usage. 

How Do Tumors Affect Different Brain Regions? 

The impact of a brain tumor depends on where it is located in the brain. Each region controls specific functions, so tumor placement influences the symptoms a person may develop. 

• Frontal lobe tumors affect personality, decision-making, voluntary movement, and speech production. 
• Parietal lobe tumors impair perception, spatial awareness, and the ability to understand language or perform calculations. 
• Temporal lobe tumors involve memory, comprehension, and auditory processing. It can cause confusion or emotional changes. 
• The occipital lobe controls your vision. Tumors here result in partial vision loss or visual hallucinations. 
• The cerebellum coordinates balance and movement. Tumors here can cause unsteadiness and dizziness. 
• The brainstem regulates critical functions like breathing, heart rate, and swallowing.  Here, tumors can be life-threatening even at small sizes. 

How Are Brain Tumors Detected? 

Diagnosis begins with a clinical evaluation when symptoms raise suspicion. If neurological signs suggest a tumor, your doctor may recommend the following steps: 

• Neurological examination: Tests reflexes, motor function, coordination, eye movement, and memory to identify the affected brain area. 
• Imaging scans: 
• MRI with contrast is the preferred method to detect and define brain tumors with precision. 
• CT scans can be used initially in emergency cases or when an MRI is not available. 
• Functional imaging: Tools like functional MRI (fMRI) help map language or motor areas before surgery. PET scans can help distinguish tumor tissue from scar tissue or infection. 
• Biopsy: A sample of the tumor is surgically removed or extracted via a guided needle to determine its type, grade, and treatment sensitivity. 

Early detection plays a critical role in improving survival, reducing complications, and tailoring individual treatment plans. 

Conclusion 

Brain tumors are serious, potentially life-altering conditions that can present with both subtle and sudden symptoms. Their impact depends on size and type, but also on which brain regions they involve. Recognising the warning signs and knowing how tumors are diagnosed helps ensure that care is not delayed. 

At Hinduja Hospital Khar, our multidisciplinary team of neurologists, neurosurgeons, oncologists, and radiologists offers advanced diagnostics and comprehensive treatment pathways. If you are facing any of the symptoms mentioned above, book an appointment today.  

Frequently Asked Question (FAQs) 

Can a brain tumor be cured? 

Some brain tumors can be cured, especially if they are benign and can be fully removed with surgery. Malignant brain tumors are harder to treat and may not always be curable, but treatments can help control them and improve quality of life. 

Can a healthy person get a brain tumor? 

Yes, brain tumors can develop in people with no prior health problems. They can affect both men and women, though some types are more common in one gender. For example, meningiomas are more common in women, while glioblastomas are seen more in men and older adults. 

Is a brain tumor painful? 

The tumor itself doesn’t cause pain, but it can press on nearby tissues and nerves. This pressure can lead to headaches, which may come with nausea, vomiting, or other neurological symptoms.