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

Bipolar disorder

Dementia with Lewy bodies

Brain Tumors

Sleep disorders

Hallucinogen use

Mental disorder

Withdrawal from benzodiazepines

Migraines

Parkinson's disease

Grief (yes, sadly)

⁉️sources from my experiences and internet research ⁉️

Seizures

Charles Bonnet syndrome

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

Affective disorders

Narcolepsy

Delirium tremens

Alzheimer's disease,

Pharmaceutical drug (abuse or side effects)

Head injury

Alcohol

Fever

Infection

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

Alcohol withdrawal

Stress

PTSD

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