Calcification of Internal Auditory Canal Tumors

Calcified vestibular schwannoma in the cerebellopontine angle

“…1 To our knowledge, this is the fourth case in which pathological findings have been reported in detail. [2][3][4][5] Generally, a calcified tumor in the cerebellopontine angle suggests a diagnosis of meningioma. 5 However, meningioma will usually have a wide base attached to the dura mater.…”

“…Preoperative diagnosis was very difficult. There have been too few reports to discuss the etiology of calcification in vestibular schwannoma; however, Atlas et al 2 proposed that it may occur as one of the secondary changes in Antoni B areas. In this case, it is speculated that organization within the tumor tissue following repeated hemorrhage resulted in calcification.…”

Cerebellopontine angle meningioma extending into internal auditory canal presenting with unilateral facial weakness and sensorineural hearing loss: Case presentation with review of literature

“…Extra-axial mass effect suggested by white matter buckling, a Journal of Kathmandu Medical College rim of CSF around the mass, a pial vascular rim and a shorter T2 of the mass are described as characteristics of meningioma. Calcifi cation and a 'dural tail' may be nonspecifi c 16,24 but broad-based extension into the petrous bone and a rugged medial tumour surface are signifi cant clues to the diagnosis of meningiomas, whereas vestibular schwannomas usually have a more spherical shape and have a smoother surface. Nager and Masica 25 reported that intracanalicular meningiomas can invade the labyrinthine segment, surrounding petrous bone and cochlea by following their individual nerve fi bres to their ends.…”

“…This case report describes in detail the clinical fi ndings, typical signal characteristics, more specifi c imaging features such as presence or absence Journal of Kathmandu Medical College Vol. of calcifi cation, a hemispheric or ice-cream-cone shape sign, adjacent hyperostosis, a 'dural tail', extension into one or more skull base neural foramina and enlargement of the IAC, which aids in a more specifi c diagnosis and skilled surgical management [13][14][15][16] .…”

Diagnosis and treatment of cavernous hemangioma of the internal auditory canal

“…[1][2][3][4][5][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][29][30][31][32][33][34][35][36][37][38][39][40] Cavernous hemangiomas of the IAC are thought to arise from the capillary plexus of the epineurium surrounding Scarpa's ganglion, 5 causing symptoms of intraneural vascular infiltration such as sensorineural hearing loss, tinnitus, dizziness, and facial nerve symptoms. Neuroimaging may show a small tumor in the IAC.…”