<p>Koch and Hamilton, Expert DDx Head and Neck </p> <p>Suprahyoid & Infrahyoid </p> <p>Anatomically Based Differentials</p> <p>Parapharyngeal Space Lesion</p> <p>Pharyngeal Mucosal Space Lesion, Nasopharynx</p> <p>Pharyngeal Mucosal Space Lesion, Oropharynx</p> <p>Masticator Space Lesion</p> <p>Buccal Space Lesion</p> <p>Parotid Space Mass</p> <p>Carotid Space Lesion</p> <p>Carotid Artery Lesion</p> <p>Perivertebral Space Lesion</p> <p>Brachial Plexus Lesion</p> <p>Visceral Space Lesion</p> <p>Cervical Tracheal Lesion</p> <p>Tracheoesophageal Groove Lesion</p> <p>Posterior Cervical Space Lesion</p> <p>Cervicothoracic Junction Lesion</p> <p>TMJ Mass Lesions</p> <p>Calcified TMJ Lesions</p> <p>TMJ Cysts </p> <p>Generic Imaging Patterns</p> <p>Diffuse Parotid Disease</p> <p>Multiple Parotid Masses</p> <p>Focal Retropharyngeal Space Mass</p> <p>Diffuse Retropharyngeal Space Disease</p> <p>Diffuse Thyroid Enlargement</p> <p>Focal Thyroid Mass</p> <p>Invasive Thyroid Mass</p> <p>Clinically Based Differentials</p> <p>Cheek Mass </p> <p>Trismus </p> <p>Oral Cavity, Mandible & Maxilla</p> <p>Anatomically Based Differentials</p> <p>Oral Mucosal Space/Surface Lesion</p> <p>Sublingual Space Lesion</p> <p>Submandibular Space Lesion</p> <p>Submandibular Gland Lesion</p> <p>Root of Tongue Lesion</p> <p>Hard Palate Lesion</p> <p>Maxillary Bone Lesion</p> <p>Generic Imaging Patterns</p> <p>Tooth-Related Mass, Sclerotic</p> <p>Tooth-Related Mass, Cystic</p> <p>Modality-Specific Imaging Findings</p> <p>Low-Density Jaw Lesion, Sharply Marginated (CT)</p> <p>Low-Density Jaw Lesion, Poorly Marginated (CT)</p> <p>Ground-Glass Lesions of Mandible & Maxilla (CT)</p> <p>Hypopharynx & Larynx </p> <p>Anatomically Based Differentials</p> <p>Hypopharyngeal Lesion</p> <p>Laryngeal Lesion</p> <p>Generic Imaging Patterns</p> <p>Epiglottic Enlargement</p> <p>Diffuse Laryngeal Swelling</p> <p>Subglottic Stenosis</p> <p>Clinically Based Differentials</p> <p>Vocal Cord Paralysis (Left)</p> <p>Vocal Cord Paralysis (Right)</p> <p>Stridor in Child</p> <p>Lymph Nodes </p> <p>Generic Imaging Patterns</p> <p>Enlarged Lymph Nodes in Neck in Adult</p> <p>Avidly Enhancing Lymph Nodes</p> <p>Enlarged Lymph Nodes in Neck of Child</p> <p>Transspatial, Multispatial, or Multilocation in Head and Neck</p> <p>Generic Imaging Patterns</p> <p>Air-Containing Lesions in Neck</p> <p>Solid Neck Mass in Infant</p> <p>Solid Neck Mass in Child</p> <p>Cystic Neck Mass in Child</p> <p>Cystic-Appearing Neck Masses in Adult</p> <p>Transspatial Mass in Child</p> <p>Transspatial Neck Mass</p> <p>Modality-Specific Imaging Findings</p> <p>Hyperdense Neck Lesion (CT)</p> <p>Low-Density Neck Lesion (CT)</p> <p>Hypervascular Neck Lesion (CT/MR)</p> <p>Clinically Based Differentials</p> <p>Angle of Mandible Mass</p> <p>Supraclavicular Mass</p> <p>Sinus and Nose </p> <p>Anatomically Based Differentials</p> <p>Sinonasal Anatomic Variants</p> <p>Generic Imaging Patterns</p> <p>Nasal Septal Perforation</p> <p>Congenital Midline Nasal Lesion</p> <p>Fibroosseous & Cartilaginous Lesions</p> <p>Inflammatory Patterns of Sinusitis</p> <p>Multiple Sinonasal Lesions</p> <p>Expansile Sinonasal Lesion</p> <p>Nasal Lesion With Bone Destruction</p> <p>Nasal Lesion Without Bone Destruction</p> <p>Sinus Lesion Without Bone Destruction</p> <p>Sinus Lesion With Bone Destruction</p> <p>Facial Bone Lesion</p> <p>Modality-Specific Imaging Findings</p> <p>Hyperdense Disease in Sinus Lumen (CT)</p> <p>Calcified Sinonasal Lesion (CT)</p> <p>T2 Hypointense Sinus Lesion (MR)</p> <p>Clinically Based Differentials</p> <p>Nasal Obstruction in Newborn</p> <p>Anosmia-Hyposmia</p> <p>Epistaxis </p> <p>Traumatic Lesions of Face</p> <p>Orbit </p> <p>Anatomically Based Differentials</p> <p>Preseptal Lesion</p> <p>Ocular Lesion, Adult</p> <p>Ocular Lesion, Child</p> <p>Optic Nerve-Sheath Lesion</p> <p>Intraconal Mass</p> <p>Extraconal Mass</p> <p>Lacrimal Gland Lesion</p> <p>Orbital Wall Lesion</p> <p>Generic Imaging Patterns</p> <p>Microphthalmos</p> <p>Macrophthalmos</p> <p>Optic Nerve Sheath Tram-Track Sign</p> <p>Extraocular Muscle Enlargement</p> <p>Large Superior Ophthalmic Vein(s)</p> <p>Ill-Defined Orbital Mass</p> <p>Cystic Orbital Lesions</p> <p>Vascular Lesions of Orbit</p> <p>Accidental Foreign Bodies in Orbit</p> <p>Surgical Devices & Treatment Effects in Orbit</p> <p>Modality-Specific Imaging Findings</p> <p>Intraocular Calcifications (CT)</p> <p>Clinically Based Differentials</p> <p>Leukocoria </p> <p>Painless Proptosis in Adult</p> <p>Painful Proptosis in Adult</p> <p>Rapidly Developing Proptosis in Child</p> <p>Infectious & Inflammatory Orbital Lesions</p> <p>Extraocular Orbital Mass in Child</p> <p>Temporal Bone </p> <p>Anatomically Based Differentials</p> <p>External Auditory Canal Lesion</p> <p>Middle Ear Lesion, Child</p> <p>Middle Ear Lesion, Adult</p> <p>Inner Ear Lesion, Adult</p> <p>Petrous Apex Lesion</p> <p>Inner Ear Lesion, Child</p> <p>Facial Nerve Lesion, Temporal Bone</p> <p>Generic Imaging Patterns</p> <p>Enhancing Middle Ear Lesions</p> <p>Expansile-Destructive Petrous Apex Lesion</p> <p>Bony Lesions of Temporal Bone</p> <p>Clinically Based Differentials</p> <p>Conductive Hearing Loss</p> <p>Peripheral Facial Nerve Paralysis</p> <p>Vascular Retrotympanic Mass</p> <p>Pulsatile Tinnitus</p> <p>Traumatic Lesions of Temporal Bone</p> <p>Secondary (Referred) Otalgia</p> <p>Skull Base </p> <p>Anatomically Based Differentials</p> <p>Normal Skull Base Venous Variants</p> <p>Skull Base Foraminal or Canal Variants</p> <p>Congenital Anomalies of Skull Base</p> <p>Intrinsic Skull Base Lesion</p> <p>Anterior Skull Base Lesion</p> <p>Cribriform Plate Lesion</p> <p>Central Skull Base Lesion</p> <p>Sellar/Parasellar Mass With Skull Base Invasion</p> <p>Unilateral Cavernous Sinus Mass</p> <p>Bilateral Cavernous Sinus Mass</p> <p>Meckel Cave Lesion</p> <p>Posterior Skull Base Lesion</p> <p>Clival Lesion </p> <p>Jugular Foramen Lesion</p> <p>Dural Sinus Lesion, General</p> <p>Foramen Magnum Mass</p> <p>CPA-IAC & Posterior Fossa</p> <p>Anatomically Based Differentials</p> <p>Small Internal Auditory Canal</p> <p>Large Internal Auditory Canal</p> <p>CPA Mass, Adult</p> <p>Prepontine Cistern Mass</p> <p>Cisterna Magna Mass</p> <p>Posterior Fossa Neoplasm, Adult</p> <p>Posterior Fossa Neoplasm, Pediatric</p> <p>Generic Imaging Patterns</p> <p>Cystic CPA Mass</p> <p>Clinically Based Differentials</p> <p>Hemifacial Spasm</p> <p>Sensorineural Hearing Loss in Adult</p> <p>Sensorineural Hearing Loss in Child</p> <p>Cranial Nerve & Brainstem</p> <p>Anatomically Based Differentials</p> <p>Midbrain Lesion</p> <p>Pontine Lesion</p> <p>Medulla Lesion</p> <p>Clinically Based Differentials</p> <p>Monocular Vision Loss</p> <p>Bitemporal Heteronymous Hemianopsia</p> <p>Homonymous Hemianopsia</p> <p>Oculomotor, Trochlear, or Abducens Neuropathy</p> <p>Trigeminal Neuropathy</p> <p>Trigeminal Neuralgia</p> <p>Complex Cranial Nerve IX-XII Neuropathy</p> <p>Hypoglossal Neuropathy</p> <p>Horner Syndrome</p> <p>Generic Imaging Patterns</p> <p>Enhancing Cranial Nerve(s)</p>