“ This is a complication of chronic middle ear infection/mastoiditis. MRI • High signal on T1 and T2 in the air cells of the petrous apex (due to cholesterol content)• With or without low-signal haemosiderin rim• Thinning of the adjacent bone” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe to our youtube …
“ This is a serious infection of the external ear canal, almost always due to pseudomonas. It is more common in the immunocompromised, especially diabetics. It erodes the skull base, causing cranial nerve palsies and sigmoid sinus thrombosis. CT • Soft tissue mass in external auditory canal, with bone erosion• Fluid-filled opacification of mastoid air cells MRI …
“MALIGNANT OTITIS EXTERNA (NECROTISING EXTERNAL OTITIS)” Read More »
“ An inflammatory process (due to e.g. infection, trauma or surgery) that may give rise to hearing loss and vertigo. CT • Bony proliferation and effacement of the cochlear” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe to our youtube channel for FRCR radiology case discussion Join our Telegram group: Radiology Made …
“ Also known as otospongiosis, this is the most frequent cause of hearing loss in young adults. Vascular/fibrotic bone changes are the cause of the sclerosis. Subtypes are fenestral (most common 80% , affects the oval window and stapes- sensorineural hearing loss ) and retrofenestral (20%, affects the otic capsule around the cochlear). common in …
“• The vast majority of skull base malignancies are due to metastatic disease, most commonly from breast cancer.• Primary sources include chordoma (clivus), chondrosarcoma, sarcoma, paraganglionoma etc.” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe to our youtube channel for FRCR radiology case discussion Join our Telegram group: Radiology Made Easy
“ This is the most common primary middle ear tumour in adults. It presents with pulsatile tinnitus and hearing loss and 30% have a VII palsy. Examination demonstrates a pulsating cherry-red mass behind the tympanic membrane. Differentials include an aberrant carotid artery, persistent stapedial artery (look for an absent foramen spinosum) and jugular bulb variants. …
“ Can be congenital or acquired. It is an epidermoid cyst in the temporal bone. The vast majority are acquired and may be complicated by erosion of the ossicles/tegmen tympani/lateral semicircular canal.The tympanic membrane is grossly abnormal and recurrence is common. Congenital cholesteatomas have an intact tympanic membrane and mass lateral to the ossicular chain.CT …