Classification of Non-neoplastic Lesions of the Oral Cavity ( Box 5-1 ) Box 5-1 Classification of Non-Neoplastic Lesions of the Oral Cavity Developmental Cystic Anomalies Nonodontogenic Cysts Nasopalatine duct cyst Median palatal cyst Nasolabial cyst Surgically ciliated cyst Others Nonodontogenic,…
Embryology of the Oral Cavity Primitive mouth or stomodeum develops partly from the surface ectoderm and partly from the endoderm of the cranial end of the foregut (the future site of the pharynx): Initially, the oropharyngeal membrane separates these structures,…
Classification of Neoplasms of the Nasal Cavity and Paranasal Sinus ( Table 3-1 ) Box 3-1 Classification of Neoplasms of the Sinonasal Tract Benign Neoplasms Epithelial Schneiderian papillomas Squamous papilloma (nasal vestibule) Minor salivary gland neoplasms Mesenchymal/Neuroectodermal Lobular capillary hemangioma…
Classification of Non-Neoplastic Lesions of the Sinonasal Tract ( Box 2-1 ) Box 2-1 Classification of Non-Neoplastic Lesions of the Sinonasal Tract Rhinosinusitis Sinonasal polyps: – Nasal (inflammatory) polyps – Antrochoanal polyp Paranasal sinus mucocele Heterotopic central nervous system tissue…
Nasal Cavity Embryology Facial prominences (frontonasal, maxillary, and mandibular) appear around the fourth week of gestation and give rise to the boundaries and structures of the face. Nasal placodes, representing bilateral thickening of the surface ectoderm along the frontonasal prominence,…