My adult son had a grand mal seizure. Tumor?

Possible. Rare but possible. His doctor will surely take this possibility into account.
Common things more. Idiopathic seizures, ones with no apparent cause or those arising fro other issues are more common than brain tumors. That said, a workup should be done to see.
Have him seen. Late onset seizures can be symptomatic of an underlying structural brain disorder.

Related Questions

Can a grand mal seizure cause death?

Yes. Epilepsy needs to be treated, with either anti-epileptic meds, vagal nerve stimulator, surgery or all of the above. Sudep is death during sleep, seizure while driving or at heights can be deadly. While aspiration and suffocation quite rare, if it happens, it can be deadly. Got the picture, always try to prevent future seizures. Read more...

Can you be conscious during a grand mal seizure?

Not likely. Grand mal or generalized tonic clonic seizures are episodes when folks "lose consciousness" followed by generalized body stiffening (tonic phase). Read more...
By definition, no: If there is no loss of consciousness, it is called a partial seizure rather than a "generalized tonic-clonic" - or grand mal. Read more...

Can you tell me what could cause a grand mal seizure?

Multiple causes. The mayo clinic has a good site on this: http://www.Mayoclinic.Org/diseases-conditions/grand-mal-seizure/basics/causes/con-20021356. If you are experiencing seizures, it is recommended you consult a neurologist. Driving can be restricted based in the state you live in, if you are having seizures. Hope that helps to answer your question! Read more...

Can people hear throughout a grand mal seizure?

Yes and no. The term grand mal should not be used. A partial seizure may occur with the patient fully aware of all that happens. A complex seizure involves alteration of awareness, but significant aspects of the event may be remembered. Primary and secondary generalized seizure are dramatic and memory is often lost before, during, and after the event. They may appear aware but are not. Read more...

For what reasons might an elderly person have a grand mal seizure?

Seizures. Causes include brain injury from a fall, which is not remembered, amnesia, bleeding within the brain, metabolic changes such as dehydration, low blood sugar lack of proper nutritionjcation. Check all medications and supplements being taken for drug interactions, overdoses or inappropriateness. Read more...