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

Grief (yes, sadly)

Pharmaceutical drug (abuse or side effects)

Withdrawal from benzodiazepines

Narcolepsy

Parkinson's disease

Migraines

Affective disorders

⁉️sources from my experiences and internet research ⁉️

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

Infection

Bipolar disorder

Mental disorder

PTSD

Hallucinogen use

Charles Bonnet syndrome

Brain Tumors

Dementia with Lewy bodies

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

Alcohol

Head injury

Sleep disorders

Seizures

Fever

Alzheimer's disease,

Delirium tremens

Alcohol withdrawal

Stress

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