Late presentation of dural tears: Two case reports and review of literature

Table 1 Diagnostic criteria for late presentation of dural tears

Clinical elements	Characteristics
Onset time	5 d after surgery, even up to 3 mo
Symptoms	Headache, dizziness, nausea, and other low intracranial pressure symptoms
Drainage fluids, transudates	Clear or light red
Imaging characteristics	MRI reveals dura damage, CSF outflow, sinus formation
β2-transferrin	+

MRI: Magnetic resonance imaging; CSF: Cerebrospinal fluid.