Can certain diseases cause paranoia similar to that seen in...

Grief (yes, sadly)

Pharmaceutical drug (abuse or side effects)

Seizures

Sleep disorders

Alzheimer's disease,

Stress

⁉️sources from my experiences and internet research ⁉️

Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:

Brain Tumors

Affective disorders

Charles Bonnet syndrome

Infection

Withdrawal from benzodiazepines

Narcolepsy

Alcohol

Migraines

Dementia with Lewy bodies

Parkinson's disease

Fever

Head injury

Mental disorder

Some of those things on the list are very very rare cases but I just wanted to cover everything (or almost everything).

PTSD

Hallucinogen use

Bipolar disorder

Delirium tremens

Alcohol withdrawal

Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?