Chapter 17: Nose, Mouth, and Throat

Nose, Mouth, and Throat thoroughly details the respiratory and digestive entryways, highlighting the nasal cavity's turbinates, meatuses, and paranasal sinuses (frontal, maxillary, ethmoid, and sphenoid), alongside the oral cavity's structures including the hard and soft palates, tongue papillae, and the parotid, submandibular, and sublingual salivary glands. The text examines key developmental variations across the lifespan, from deciduous tooth eruption and obligate nose breathing in infants to age-related olfactory decline, decreased salivation, and altered dentition in older adults. It also addresses genetic and environmental risk factors, focusing on anomalies like cleft lip, obstructive sleep apnea, and human papillomavirus-linked oropharyngeal cancers. For effective clinical history taking, the chapter outlines essential subjective data collection regarding symptoms such as epistaxis, dysphagia, rhinitis, hoarseness, and the critical diagnostic distinction between viral and group A streptococcal pharyngitis. The objective physical examination procedures are systematically described, instructing healthcare practitioners on the proper use of clinical tools like the nasal speculum and penlight to assess mucosal integrity, septal deviation, tonsillar grading, and specific cranial nerve functions (glossopharyngeal, vagus, and hypoglossal nerves). Furthermore, the text categorizes a wide array of pathological findings, equipping students to visually identify and understand conditions ranging from common dental caries, candidiasis, and aphthous ulcers to severe presentations like peritonsillar abscesses, leukoplakia, and oral carcinomas. Finally, it emphasizes vital health promotion and patient teaching strategies, providing a structured, behavioral approach for clinicians to counsel patients on tobacco cessation to mitigate the profound risks of systemic disease and malignancies.