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

Pharmaceutical drug (abuse or side effects)

Dementia with Lewy bodies

Infection

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

Charles Bonnet syndrome

Head injury

Alcohol

Parkinson's disease

Alcohol withdrawal

Mental disorder

Fever

Affective disorders

Brain Tumors

Narcolepsy

Stress

Withdrawal from benzodiazepines

Migraines

Delirium tremens

Grief (yes, sadly)

Hallucinogen use

PTSD

Alzheimer's disease,

Sleep disorders

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

Seizures

Bipolar disorder

⁉️sources from my experiences and internet research ⁉️

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