Fluctuating level of consciousness is seen in
Delirium is characterized by an acute decline in both the level of consciousness and cognition with paicular impairment in attention. Reference: Kaplan & Sadock's Synopsis of Psychiatry: Behavioral Sciences/Clinical Psychiatry, 11th Edition, page 697.
Hysteria
Delirium
Dementia
Mania
Symptoms and signs in psychiatry and classification