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

Grief (yes, sadly)

Brain Tumors

Migraines

Parkinson's disease

Fever

Alzheimer's disease,

Hallucinogen use

Sleep disorders

Affective disorders

Mental disorder

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

⁉️sources from my experiences and internet research ⁉️

Pharmaceutical drug (abuse or side effects)

Dementia with Lewy bodies

Charles Bonnet syndrome

Infection

Bipolar disorder

Seizures

Narcolepsy

Delirium tremens

Alcohol

Alcohol withdrawal

Head injury

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

PTSD

Stress

Withdrawal from benzodiazepines

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