What is the most common site of pleomorphic adenoma?
Among the major salivary glands, the tail of the superficial lobe of the parotid salivary gland is the most common site of occurrence for pleomorphic adenoma (70-80% of cases), although this lesion can occur in any parotid location.
What is pleomorphic adenoma of the salivary gland?
Pleomorphic adenoma is a common benign salivary gland neoplasm characterised by neoplastic proliferation of parenchymatous glandular cells along with myoepithelial components, having a malignant potentiality. It is the most common type of salivary gland tumor and the most common tumor of the parotid gland.
What are the symptoms of pleomorphic adenoma?
The most common symptom of pleomorphic adenoma, according to studies found on online radiology CME courses, are the development of a lump or swelling on, in, or near your neck, jaw, or mouth. You may also feel numbness and muscle weakness in part of your face, along with continuous pain in your salivary gland.
What is a pleomorphic adenoma?
Pleomorphic adenomas are benign salivary gland tumors, which predominantly affect the superficial lobe of the parotid gland. The “pleomorphic” nature of the tumor can be explained on the basis of its epithelial and connective tissue origin.
How common are pleomorphic adenomas?
Pleomorphic adenoma is the most common benign salivary gland neoplasm. In most studies, it represents 45-75% of all salivary gland tumors; the annual incidence is approximately two to three and a half cases per 100,000 population.
How does pleomorphic adenoma occur?
The causes of pleomorphic adenomas are still unknown and the risk factors have not been fully ascertained yet. In addition to age, risk factors may be related to smoking habits, alcohol abuse, a diet rich in cholesterol and previous radiation therapy treatments in the face and neck regions.
What causes pleomorphic adenoma?
Why is pleomorphic adenoma called?
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.
Are pleomorphic adenomas common?
What does pleomorphic mean?
: able to assume different forms : polymorphic pleomorphic bacteria a pleomorphic sarcoma. Other Words from pleomorphic More Example Sentences Learn More About pleomorphic.
Are pleomorphic adenomas painful?
Pleomorphic adenoma typically presents as a slow-growing, painless, firm mass and is only occasionally associated with facial palsy or pain.