Fig. 1

A: A 62-year-old female presented with a 1-month history of high left ear pain in the jugular fossa and left middle ear mastoiditis. Bilateral without sigmoid sinus disease B: A 62-year-old female presented with a 1-month history of left ear pain; left middle ear mastoiditis. High jugular fossa, bilateral, without sigmoid sinus disease C: Female 23 years old, normal mastoid process, tinnitus, deep sigmoid sulcus on the left side, diverticulum, thin bone wall, high jugular vein on the left side D: Female 23 years old, normal mastoid process, tinnitus, deep sigmoid sulcus on the left side, diverticulum, thin bone wall, high jugular vein on the left side E: Female 23 years old, normal mastoid process, tinnitus, deep sigmoid sulcus on the left side, diverticulum, thin bone wall, high jugular vein on the left side F: Female 45 years old, tinnitus for half a year, bone wall defect of about 2 mm in superior flexure segment of right sigmoid sinus