EAR

“MALIGNANT OTITIS EXTERNA (NECROTISING EXTERNAL OTITIS)”

“ 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 …

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“LABYRINTHITIS OBLITERANS”

“ 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 …

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SKULL BASE MALIGNANCY

“•  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   

“GLOMUS TYMPANICUM PARAGANGLIONOMA”

“ 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. …

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“CHOLESTEATOMA”

“ 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 …

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