CT manifestations,incidence,etiology and clinical significance of hyperostosis frontalis interna / 实用放射学杂志

ABSTRACT

Objective To explore the CT manifestations,incidence,etiology and clinical significance of hyperostosis frontalis in-terna (HFI).Methods CT features of 243 cases HFI were analyzed retrospectively.Based on the maximum thickness of the inner table of the frontal bone,HFI was classified into 4 grades as followsGradeⅠ─ thickness of 2.8-6.0 mm,GradeⅡ─ thickeness of 6.1-10.0 mm,Grade Ⅲ ─ thickness of 10.1-14.0 mm,Grade Ⅳ ─ thickness of greater than 14.1 mm.According to the in-crassating direction,HFI was classified into inward,outward and intermediate type.Results The inner table of the frontal bone was incrassated in all cases (n=243).The thickness ranged between 2.93 mm and 14.64 mm,including GradeⅠin 68 cases (28.0%), GradeⅡin 71 cases (29.2%),Grade Ⅲ in 69 cases (28.4%)and Grade Ⅳ in 35 cases (14.4%).There were inward type in 82 ca-ses (33.7%),outward type in 59 cases (24.3%)and intermediate type in 102 cases (42.0%).The incidence of HFI was 5.47% in postmenopausal women,with 7.14% in overweight and 9.09% in obese women respectively.Conclusion HFI is common in the postmenopausal women,and CT manifestations of HFI are characteristic.