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:

Bipolar disorder

PTSD

Mental disorder

Withdrawal from benzodiazepines

Alcohol withdrawal

Dementia with Lewy bodies

Stress

⁉️sources from my experiences and internet research ⁉️

Grief (yes, sadly)

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

Narcolepsy

Hallucinogen use

Head injury

Sleep disorders

Charles Bonnet syndrome

Fever

Infection

Alzheimer's disease,

Brain Tumors

Parkinson's disease

Affective disorders

Pharmaceutical drug (abuse or side effects)

Seizures

Alcohol

Delirium tremens

Migraines

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