"T1: usually of low intensity 1"
"T1 C+ (Gd): usually demonstrates homogeneous enhancement 1"
"Malignant transformation to carcinoma ex-pleomorphic adenoma is uncommon (1–10%), more common in larger tumours and older patient age 15. Additional risk factors for malignancy include radiation therapy and recurrent tumours 2,6."
"Historically, pleomorphic adenomas have also been called benign mixed tumours; however, this name is now discouraged. It was previously thought that these were a form of teratoma; however, it is now clear that the neoplasm forms epithelial and myoepithelial cells 1."
"Ultrasound is also useful for guiding a biopsy (both FNAC and core biopsies) but should be performed with care to avoid facial nerve damage 8,9."
"FDG-PET may show some uptake; SUV>3 in 25% of cases 11."
"Percutaneous ultrasound biopsy (both FNAC and core biopsy) can be performed safely and is associated with very low tumour seeding rates and no facial nerve injury, provided a meticulous technique is used 8,9."
"Warthin tumour"
"Küttner tumour"
Expected headings
"Associations"
"Signal characteristics"
"Complications"
"Pleomorphic adenomas of the salivary glands, also known as benign mixed tumours (see below), are the most common salivary gland tumours. On imaging, they commonly present as well-circumscribed, rounded masses, most commonly located within the parotid gland, hypoechoic on ultrasound, high signal on T2WI, and with homogeneous enhancement on MRI."
"Historically, pleomorphic adenomas have also been called benign mixed tumours; however, this name is now discouraged. It was previously thought that these were a form of teratoma; however, it is now clear that the neoplasm forms epithelial and myoepithelial cells 1."
"Historically, pleomorphic adenomas have also been called benign mixed tumours; however, this name is now discouraged. It was previously thought that these were a form of teratoma; however, it is now clear that the neoplasm forms epithelial and myoepithelial cells 1."
"As the name suggests, pleomorphic adenomas are composed of a mixture of several tissues. They contain both epithelial and myoepithelial (mesenchymal) tissues, with mixed histology. They appear encapsulated and well-circumscribed; however, the pseudocapsule is delicate and incomplete, with microscopic extensions beyond it, accounting for the high risk of recurrence when these tumours are enucleated (see below) 5,6."
"FDG-PET may show some uptake; SUV>3 in 25% of cases 11."