Part I: Introduction and Overview of Suprahyoid and Infrahyoid Neck Part II: Parapharyngeal Space Section 1: Benign Tumors Part III: Pharyngeal Mucosal Space Section 1: Congenital Lesions Section 2: Infectious and Inflammatory Lesions Section 3: Benign and Malignant Tumors Part IV: Masticator Space Section 1: Pseudolesions Section 2: Infectious Lesions Section 3: Benign Tumors Section 4: Malignant Tumors Part V: Parotid Space Section 1: Infectious and Inflammatory Lesions Section 2: Benign Tumors Section 3: Malignant Tumors Part VI: Carotid Space Section 1: Normal Variants Section 2: Vascular Lesions Section 3: Benign Tumors Part VII: Retropharyngeal Space Section 1: Infectious and Inflammatory Lesions Section 2: Metastatic Tumors Part VIII: Perivertebral Space Section 1: Pseudolesions Section 2: Infectious and Inflammatory Lesions Section 3: Vascular Lesions Section 4: Benign and Malignant Tumors Part IX: Posterior Cervical Space SECTION 1: BENIGN TUMORS Section 2: Metastatic Tumors Part X: Visceral Space Section 1: Inflammatory Lesions Section 2: Metabolic Disease Section 3: Benign Tumors Section 4: Malignant Tumors Section 5: Miscellaneous Part XI: Hypopharynx, Larynx, and Cervical Trachea Section 1: Infectious and Inflammatory Lesions Section 2: Trauma Section 3: Benign and Malignant Tumors Section 4: Treatment-Related Lesions Section 5: Miscellaneous Part XII: Lymph Nodes Section 1: Infectious and Inflammatory Lesions Section 2: Malignant Tumors Part XIII: Transspatial and Multispatial Section 1: Normal Variants Section 2: Benign Tumors Section 3: Malignant Tumors Section 4: Miscellaneous Part XIV: Oral Cavity Section 1: Pseudolesions Section 2: Congenital Lesions Section 3: Infectious and Inflammatory Lesions Section 4: Benign Tumors Section 5: Malignant Tumors Part XV: Mandible-Maxilla and TMJ Section 1: Congenital LESIONS Section 2: Nonneoplastic Cysts Section 3: Infectious and Inflammatory Lesions Section 4: Tumor-Like Lesions Section 5: Benign and Malignant Tumors Section 6: Treatment-Related Lesions Part XVI: Introduction and Overview of Squamous Cell Carcinoma Part XVII: Primary Sites, Perineural Tumor and Nodes Section 1: Nasopharyngeal Carcinoma Section 2: Oropharyngeal Carcinoma Section 3: Oral Cavity Carcinoma Section 4: Hypopharyngeal Carcinoma Section 5: Laryngeal Carcinoma Section 6: Perineural Tumor Section 7: Squamous Cell Carcinoma Lymph Nodes Part XVIII: Posttreatment Neck Part XIX: Pediatric Lesions Section 1: Congenital Lesions Section 2: Benign Tumors and Tumor-Like Lesions Section 3: Malignant Tumors Part XX: Syndromic Diseases Part XXI: Nose and Sinus Section 1: Congenital Lesions Section 2: Infectious and Inflammatory Lesions Section 3: Benign Tumors and Tumor-Like Lesions Section 4: Malignant Tumors Part XXII: Orbit Section 1: Congenital Lesions Section 3: Infectious and Inflammatory Lesions Section 4: Tumor-Like Lesions Section 5: Benign Tumors Section 6: Malignant Tumors Section 1: Clivus Section 2: Sphenoid Bone Section 3: Occipital Bone Section 4: Jugular Foramen Section 5: Dural Sinuses Section 6: Diffuse or Multifocal Skull Base Disease Part XXIV: Skull Base, Facial, and Temporal Bone Trauma Section 1: Skull Base and Temporal Bone Section 2: Facial Bones Part XXV: Temporal Bone Section 1: External Auditory Canal Section 2: Middle Ear-Mastoid Section 3: Inner Ear Section 4: Petrous Apex Section 5: Intratemporal Facial Nerve Section 6: Temporal Bone, No Specific Anatomic Location Part XXVI: CPA-IAC Section 1: Introduction and Overview Section 2: Congenital Lesions Section 3: Infectious and Inflammatory Lesions Section 4: Benign and Malignant Tumors Section 5: Vascular Lesions.