What is the most common site of pleomorphic adenoma?
Pleomorphic adenomas occur most often in the parotid gland, with a predilection for the tail of the superficial lobe (70-80% of cases). The tumor is less commonly seen in the submandibular gland (10%), and it is seldom encountered in the sublingual gland (1%).
What percentage of parotid gland tumors are benign?
Approximately 80% of salivary gland tumours occur in the parotid gland. Of these, approximately 75- 80% are benign. There is no consistent correlation between the rate of tumour growth and whether a tumour is benign or malignant. The majority of benign tumours of the parotid gland are epithelial tumours.
How is Frey syndrome diagnosed?
A diagnosis of Frey syndrome is made based upon identification of characteristic symptoms, a detailed patient history, a thorough clinical evaluation and a specialized test called the minor iodine-starch test. During this test, an iodine solution is applied to the affected areas of the face.
How do you test for Frey syndrome?
Diagnosis of Frey syndrome is based on clinical history, but confirmatory testing can be done with a Minor starch-iodine test. The starch-iodine test consists of painting the patient’s postsurgical affected region with iodine. Once dry, dry starch is then applied to the painted area, and a salivary stimulus is given.
Which CT findings are characteristic of pleomorphic adenoma?
CT examination a pleomorphic adenoma usually appears as smoothly marginated or lobulated homogeneous soft tissue density globular mass. Necrosis can be seen in larger masses. Few foci of calcification are common. Smaller tumors show early homogenous prominent enhancement while in the case of larger tumors enhancement is less marked and delayed.
What is microscopically pleomorphic adenoma?
Microscopically pleomorphic adenoma has a highly variable appearance, hence the name pleomorphic. It is characterized by mixed proliferation of polygonal epithelial and spindle-shaped myoepithelial cells in a variable stroma matrix of mucoid, myxoid, cartilaginous or hyaline origin.
Is there any imaging experience with recurrent parotid pleomorphic adenoma?
Imaging features of recurrent parotid pleomorphic adenoma have been infrequently reported in the radiology literature. In the present study, we reviewed our institutional experience with imaging of recurrent parotid pleomorphic adenomas.
What are the signs and symptoms of pleomorphic adenoma recurrence?
The presence of solitary and especially multiple subcutaneous nodules, or T2 hyperintense lesions spanning multiple spaces adjacent to the parotid/operative bed in patients with prior parotidectomy for pleomorphic adenoma, should suggest the diagnosis of recurrence.