TABLE 2:

MR findings in atypical central skull base osteomyelitis

Patient (no.)	Abnormal SI in Clivus	Preclival ST Mass	T1 SI in Clivus	T2 SI in Clivus	Postcontrast Enhancement	ST in CS	ST in MC	IC Extension
1	Y	Y	Low	High	Y	N	N	N
2	Y	Y	Low	Heterogeneous	Y	Y*	Y	N
3	Y	Y	Low	Heterogeneous	Y	Y*	Y	Y
4	Y	Y	Low	High	Y	N	N	N
5	Y	Y	Low	High	Y	Y	Y	N
6	Y	Y	Low	High	Y	Y*	Y	Y

Note.—Signal intensity in clivus is compared with that of normal fatty marrow. SI indicates signal intensity; ST, soft tissue; CS, cavernous sinus; MC, Meckel’s cave; IC, intracranial. Intracranial extension implies extension beyond CS or MC, involving dura or brain parenchyma or both.

^*= associated carotid narrowing or occlusion.