“ Commonly, it arises due to adjacent sinusitis (also trauma, foreign body, etc.). CT • Inflammation of the peri-orbital fat. • With or without focal fluid collection showing rim enhancement. • Pre-septal infection is confined to the tissues anterior to the septum (the point of attachment of the eyelid). • Post-septal infection is usually extra-conal …
“ May occur with hypo- or hyper-parathyroidism, Fahr disease, post-anoxia, neonatal AIDS or Cockayne disease. CT • Look for calcification elsewhere, suggesting a systemic problem.” 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
“ In total, 80%-90% are SCCs. It is often clinically silent or may present with an obstructive sinusitis and bone destruction. Esthesioneuroblastoma is a destructive tumour arising from the olfactory nerve/neurosensory cells of the nasal mucosa and often invades the anterior cranial fossa. CT • Soft tissue lesion typically at the fossa of Rosenmuller ” …
“ Air-fluid levels and mild mucosal thickening is only indicative with a relevant history. Usually a viral aetiology. Complications of sinusitis include polyps, mucous retention cyst and mucocele. CT • Opacification of the sinus/mucosal thickening.• Sinus expands and bone remodels (bony wall may thin due to pressure necrosis).• Peripheral enhancement.• Complete absence of air in …
“ 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 …