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

Grief (yes, sadly)

Affective disorders

Pharmaceutical drug (abuse or side effects)

Mental disorder

Sleep disorders

Fever

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

Delirium tremens

Hallucinogen use

⁉️sources from my experiences and internet research ⁉️

Stress

Brain Tumors

Alzheimer's disease,

Parkinson's disease

Migraines

Withdrawal from benzodiazepines

PTSD

Bipolar disorder

Seizures

Charles Bonnet syndrome

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

Narcolepsy

Dementia with Lewy bodies

Alcohol withdrawal

Infection

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