■ Mucoepidermoid Carcinoma Clinical Features Mucoepidermoid carcinoma (MEC) is the most common malignant salivary gland tumor (12% to 29%). Over half of all cases involve major glands, particularly the parotid ( Fig. 13.1 ). Other sites include the mouth, particularly…
▪ Precursor Squamous Lesions Precursor lesions are difficult to define because they have an increased likelihood of progressing to squamous cell carcinoma (SCC). A constellation of architectural and cytologic features constitute dysplasia, but these features are not uniformly accepted or…
▪ Vocal Cord Polyps and Nodules Vocal cord polyps and nodules represent reactive changes of laryngeal mucosa and adjacent stroma that result in a benign polypoid or nodular growth. The etiology is multifactorial, including laryngeal trauma (accidents or surgery), excessive…
Malignant tumors of the sinonasal tract (SNT) are rare, comprising less than 1% of all neoplasms and about 3% of those of the upper aerodigestive tract. Squamous cell carcinoma (SCC) and adenocarcinoma are strongly associated with environmental factors, including the…
▪ Sinonasal Papillomas The mucosa of the nasal vestibule and the superior wall of the nasal cavity are lined by squamous and olfactory mucosa, respectively. The remaining nasal mucosa consists of ciliated columnar epithelium of ectodermal origin known as the…
Acknowledgments My heartfelt appreciation to Ms. Hannah B. Herrera for her reference wrangling. The opinions or assertions contained herein are the private views of the author. Introduction The head and neck, by convention defined as the area above the clavicles…
Reactive and neoplastic lesions of the ear are infrequent but may pose diagnostic difficulties for the pathologist. The inner ear is composed of a specific form of inert bone, a virtually nonmitotic sensory area, and nerves. Its tumors are mainly…