“ Benign, mineralised lesion with a lucent halo. It is self-limiting and usually incidental unless infected. PLAIN FILM • Multiple expansile sclerotic lesions with adjacent lucency centred on the tooth apices.• It is the only lytic and sclerotic lesion in this location.• Bilateral and symmetrical. ” For Radiology Cases, Discussion join: Radiology Made Easy on …
“ This is the most common benign tumour of the parotid tail. Patients are typically aged 50-70 years. US • Well-defined heterogeneous mass.• 10% are bilateral. MRI • Well-defined mass • Low T1 relative to the parotid, heterogeneous high T2 signal • Do not enchance with Gadolinium NUCLEAR MEDICINE • This is the only parotid tumour …
“ This is a retention cyst arising from the sublingual gland. The simple type is confined to the sublingual space; the diving type extends to the submandibular space. MRI • Best demonstrated on T2 sequences. Look for a fluid signal lesion in the sublingual space (simple) or extending to the submandibular space (diving).• Thick wall …
“• Bilateral changes with herpes simplex virus• Posteromedial temporal lobe affected (supplied by the posterior cerebral artery [PCA])” 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
“ Mostly from aspergillus or mucormycosis. CT • Bone erosion is seen with allergic sinusitis—look for polyps.• Extension outside the sinus without bone erosion is known as invasive sinusitis—this is more common with immunocompromise and diabetes.” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe to our youtube channel for FRCR radiology case …
“ Thyroid cancer is three-times more common in women. It usually presents with a palpable solitary nodule without thyroid dysfunction. Fine needle aspiration (FNA) is used for diagnosis. Features of thyroid malignancy ” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe to our youtube channel for FRCR radiology case discussion Join our …
“ This is the most common ocular tumour in adults. It arises from the choroid. For tumours >12 mm, the mortality is 70%. US • ‘Cottage loaf’ appearance CT • Hyperdense mass• Nearly always unilateral• Check for liver metastases MRI • High signal on T1 (due to melanin), low on T2 ” For Radiology Cases, …
“ Optic nerve glioma Optic nerve sheath meningioma 80% <20 years of age Middle-aged women Variable enhancement ‘Tram track’ enhancement Calcification rare Calcification in up to 50% Buckling of the nerve (fusiform thickening ) Straight nerve (tubular thickening) Often asymptomatic Visual impairment early ” For Radiology Cases, Discussion join: Radiology Made Easy on Facebook Subscribe …
“ This is a posterior nasopharyngeal cyst. It is common and benign. It is filled with proteinaceous material that will intermittently discharge its contents, causing halitosis and a bad taste. They rarely become infected. CT• High-attenuation (due to protein content) nasopharyngeal cyst MRI • Thin-walled cyst• High signal on T1 and T2 (protein content)• No …
“ ask yourself three questions: what is the relation to the tooth? Is it a unilocular or multilocular cyst? How old is the patient? Cyst characteristic Differential Unilocular, related to the dentition Periapical/radicular cyst (painful)Dentigerous cyst (at the crown of an unerupted tooth) Unilocular, not related to dentition less than 30 years of age: odontogenic …