Table 4.

Differential diagnosis between Cyclic Vomiting Syndrome and intracranial masses.

	Cycling vomiting syndrome	Intracranial masses
Prodromal symptoms	Always present	Rarely present
Dehydration	Always present	Rarely present
Warning signs*	Absent	Often present
MRI alterations	Absent	Present

^*Headache, altered sensory, papilledema, hypertension, bradycardia or tachycardia, signs of herniation, retinal hemorrhages, bluish skin lesions, fractures, ataxia, cranial nerve deficits, motor/sensory deficit, seizures, visual dysfunction.