TABLE 1.

Classifications of incidental findings.

	Incidental findings
No referral necessary	WMH, brain atrophy, EPVS, CMBs, paranasal sinusitis, retention cysts of the maxillary sinus, mastoiditis, calvarial thickening
Routine referral	Pineal cyst, enlarged cisterna magna, asymptomatic brain infarct, empty sella, falx cerebri ossification, Rathke’s cleft cyst, hydrocephalus, cysts of the septum pellucidum, subdermal cyst
Urgent referral	Meningioma, pituitary adenoma, cavernous malformation, venous malformation, arachnoid cyst, osteoma, bone cyst, craniopharyngiomas, metastasis, chronic subdural hematoma
Immediate referral	Intracranial hemorrhage, i.e., acute subdural hematoma

WMH, white matter hyperintensities; EPVS, enlarged perivascular space; CMBs, cerebral microbleeds.