What are the three diagnoses that should be considered when working up isolated vertigo (ABCs) and how do you distinguish each?
a) Acute labyrinthitis, benign paroxysmal positional vertigo, cerebellar stroke; Distinguished by associated symptoms and physical exam findings
b) Acute otitis media, basilar artery thrombosis, cervical spine injury; Distinguished by imaging studies
c) Acoustic neuroma, bacterial meningitis, carotid artery dissection; Distinguished by laboratory tests
d) Acute gastritis, bronchial asthma, chronic obstructive pulmonary disease; Distinguished by medical history