TABLE 2:

Initial and follow-up imaging findings in 10 patients with SDE

Patient (No.)	Location of SDE	Initial MR Study^*				ADC, ×10⁻³ mm²/s	Associated Abnormalities	Duration between Initial and Follow-up MR Studies, d	Clinical Features at Follow-up MR Imaging	Follow-up MR Study^*
Patient (No.)	Location of SDE	T1WI	T2WI	Enhanced^†	DWI	ADC, ×10⁻³ mm²/s	Associated Abnormalities	Duration between Initial and Follow-up MR Studies, d	Clinical Features at Follow-up MR Imaging	Enhanced^†	DWI
1	R FP	Hypo	Mild hyper	Thick, linear	Hyper, hypo	0.892	L RSE (thin, linear)^†	21	Fever	Thick, linear	Hyper, hypo
2	L F	Hypo	Hyper	Thick, linear	Hyper	NA	L orbital cellulites	16	Fever	Thick, linear	Hyper
3	L FP	Iso	Hyper	Thick, irregular	Hyper	NA	NA	NA	NA	NA	NA
4	B FPO	Iso	Mild hyper	Thick, linear	Hyper	0.644	NA	12	Fever, seizure	Thick, linear	Hyper
5	L F	Iso	Hyper	Thick, linear	Hyper	0.306	L orbital cellulites	NA	NA	NA	NA
6	Mid F base	Hypo	Hyper	Thick, linear	Hyper	NA		NA	NA	NA	NA
7	R pF, R PO, R T	Mild hypo	Iso	Thick, linear	Hyper	0.642	R RSE (thin, linear)^† infected later	5	Fever	Thick, linear	Hyper
8	B F, R pF	Iso	Mild hyper	Thick, linear	Hyper	0.698	NA	23	Fever, chills	Thick, linear	Hyper
9	L FP, L pF	Iso	Mild hyper	Thin, linear	Hyper	0.438	NA	6	Fever, R hemiparesis	Thin, linear	Hyper
10	L CPA	Hypo	Hyper	Thick, linear	Hyper	0.608	Cavernous sinus infection	10	Afebrile, leukocytosis (blood)	Thick, linear	Hyper

Note.—B indicates bilateral; CPA, cerebellopontine angle; F, frontal; FP, frontoparietal; FPO, fronto-occipitoparietal; Hyper, hyperintense; hypo, hypointense; Iso, isointense; NA, not available or not applicable; pF, parafalcine; PO, parieto-occipital; T, temporal; T1WI, T1-weighted image; and T2WI, T2-weighted image.
* Signal intensity relative to that of gray matter.
† Morphology of the enhancing membrane.