Thank you for posting your query regarding your father's illness.
The only absolute method of finding out the brain disease is a biopsy
of the lesion. However, since biopsy requires brain operation, many doctors start TB treatment on empirical basis, as it is common in India and is fully treatable.
You can repeat the MRI
of brain in your father. If the lesions have increased in size, a brain biopsy of the lesion may be done to find out the exact cause. Another test that may help is the PET-CT scan
of whole body, which is helpful in cases of metastases.
Please get back if you require any additional information.
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad,
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