Accessory parotid glands are a normal variant and represent ectopic salivary tissue present away and separate from the main parotid gland. located on the masseter muscle, anterior to the main parotid gland, in close association (usually above) or anterior to the Stensen's duct accessory parotid glands have their own blood supply and secondary duct emptying into the Stensen's duct. http://radiopaedia.org/articles/accessory-parotid-glands
Molar tooth sign |Radiopaedia.org: The molar tooth sign refers to the appearance of the midbrain in axial section which the elongated superior cerebellar peduncles give the midbrain an appearance reminiscent of a molar or wisdom tooth. It was initially described in Joubert syndrome and related disorders (JSRD) , but is now recognized to occur in a number of other conditions, e.g. nephronophtisis, hepatic fibrosis and in Cogan's syndrome.
An azygos lobe is created when a laterally displaced azygos vein makes a deep pleural fissure into the apical segment of the right upper lobe during embryological development. It is a normal anatomic variant of the right upper lobe due to invagination of the azygos vein. The azygos lobe is usually well seen on the chest radiograph, where it is limited by the azygos fissure. http://radiopaedia.org/articles/azygos-lobe
Image guided renal biopsy, utilizing either ultrasound or CT allows for an accurate, reliable method of acquiring renal tissue for histopathological assessment. Biopsy make be of a native or transplant kidney. It is divided into 2 types: Non-focal ( as in this case) Focal (lesional) Read more: http://radiopaedia.org/articles/image-guided-renal-biopsy