■ Squamous Papillomas Squamous papillomas are the most common benign neoplasms of the larynx and trachea, characterized by an exophytic squamous epithelium lining branching fibrovascular cores, often associated with human papillomavirus (HPV) infection. They may be solitary or may present…
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…
■ Rhinosinusitis Rhinosinusitis is defined simply as inflammation of the nasal cavity (rhinitis), paranasal sinuses (sinusitis), or both (rhinosinusitis). Clinical Features Rhinosinusitis is a common condition that can be caused by myriad etiologies, including allergies (most common), infections, aspirin intolerance,…
Introduction Soft-tissue tumors of the head and neck are very rare, as compared to the far more common epithelial tumors that arise in these anatomic locations. Although benign lesions doubtless account for the great majority of head and neck soft-tissue…
Anatomy and Histology Nasal Cavity The nose is a complex organ composed of two components: the external and the internal nose. The external nose is triangular, with a wide base covering two external openings, the nares or nostrils, separated by…