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

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

Head injury

Seizures

PTSD

Brain Tumors

Alcohol

Sleep disorders

Delirium tremens

Mental disorder

Charles Bonnet syndrome

Pharmaceutical drug (abuse or side effects)

Stress

Affective disorders

Hallucinogen use

Infection

⁉️sources from my experiences and internet research ⁉️

Alcohol withdrawal

Migraines

Parkinson's disease

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

Dementia with Lewy bodies

Grief (yes, sadly)

Fever

Narcolepsy

Bipolar disorder

Withdrawal from benzodiazepines

Alzheimer's disease,

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