eRadiograph Volume 7: Imaging of Oral Cavity

Vascular pathology Vertebral artery – dissection thrombosis, aneurysm, pseudoaneurysm, AV fistula dissection usually occurs in the setting of blunt cervical trauma – most commonly V3 segment as this segment is enclosed between C2 vertebral foramen and dura. There is a tear in the intima with an intra mural haematoma. This appears as a crescentic hyperintensity on T1/2W with a narrowing of the vertebral lumen. Schwanomas These are usually intradural but may be extradural. They may develop cystic degeneration or haemorrhage. Perivertebral Space Malignant Peripheral Nerve Sheath Tumor – These lesions demonstrate marked heterogenity due to secondary cystic degeneration and necrosis. 605 are associated with bone destruction and invasion of surrounding tissues. Marked heterogenesity due secondary cystic degeneration, necrosis 60% associated with NF – 1 and may be associated with bone destruction and invasion of surrounding tissues. 306

eRadiograph Volume 7: Imaging of Oral Cavity | Page 306