EHMTI-0271. Refractory chronic daily headache and idiopathic intracranial hypertension: preliminary results of a prospective study

Results Among the 23 consecutive patients enrolled, 19 (13 F, 6 M; mean age 47.9 ± 12.3; mean BMI 26.1± 4.8) completed the study, 4 female patients dropped out. None of the 19 patients had papilledema. We found a TSS in 11 of 19 cases (58%): bilateral in 3 patients and unilateral in 8 cases. All of 19 cases displayed OP lower than 250 mmH2O (range 102-245) and normal CSF composition. We found a OP greater than 200 mmH2O only in four patients (1M, 3 F) (17%): two of them achieved an improvement of headache intensity and frequency after 12-18 ml CSF withdrawal; one of them had bilateral TSS.