Temporal Bone and Cerebellopontine angle; Skull base
Right glomus tympanicum paraganglioma (Glasscock/Jackson - type 1) 1. Glomus tympanicum paragangliomas are the most common tumor of the middle ear cavity. They arise from the Jacobson nerve at the cochlear promontory. It appears as a soft tissue mass lateral to the cochlear promontory with intact jugular bulb. Contrast-enhanced MRI shows avid enhancement.
Case courtesy Prof. Dr Mohamed Eid, Professor of Radiodiagnosis, Alexandria University, Egypt.