Fig. 1

Image of the patient. A and B Pre-and post-operative CT scan images of the middle ear, showing slightly blurred bone in the apical region. C and D Pre-and post-operative middle ear transverse position T1WI MRI, showing low signal in the apex of petrous part. E and F Pre-and post-operative middle ear transverse position T1WI + FS enhancement MRI, showing moderate enhancement in the apex of petrous part, with no significant preoperative or postoperative changes. G and H Pre-and post-operative middle ear transverse position T1WI + FS MRI, showing slightly higher signal in the apex of petrous part with blurred boundaries. I and J Cranial MRV, showing irregular wall of posterior superior sagittal sinus, narrow lumen, low blood flow signal, considerd thrombosis; Left sigmoid sinus normal, Decreased blood flow signal in the right sigmoid sinus