Saudi Board Final Exam - Otorhinolaryngology-Head and Neck Surgery (SCFHS)

During a cortical mastoidectomy for chronic otitis media, the otologic surgeon identifies anatomical landmarks to locate the mastoid (vertical) segment of the facial nerve. Which of the following landmarks serves as the most reliable indicator of the facial nerve at the level of the stylomastoid foramen?

• AThe spine of Henle on the lateral mastoid cortex
• BThe horizontal semicircular canal
• CThe anterior border of the digastric ridge
• DThe chorda tympani nerve at its intratympanic course

The endocochlear potential (+80 mV) in the scala media is vital for cochlear hair cell transduction. Which cellular structure within the cochlea is primarily responsible for generating and maintaining this high positive potential and the high potassium concentration of endolymph?

• ADeiters cells in the organ of Corti
• BMarginal cells of the stria vascularis
• CBasal cells of the spiral ligament
• DInterdental cells of the spiral limbus

Which of the following statements regarding the molecular physiology of the human olfactory neuroepithelium is correct?

• AOlfactory sensory neurons are pseudounipolar cells that do not regenerate after birth
• BOdorant binding directly opens voltage-gated sodium channels without second messenger cas…
• CSupporting (sustentacular) cells act as the stem cells that continuously replace mature o…
• DOdorant receptors are G-protein-coupled receptors that activate adenylyl cyclase type III…

A 48-year-old woman is found to have an asymptomatic 3-cm mass in the left parapharyngeal space. On cross-sectional imaging, the styloid process is noted, and the tensor-vascular-styloid fascia (fascia of Juvara) divides this space into prestyloid and poststyloid compartments. Which of the following anatomical structures is normally situated in the poststyloid parapharyngeal compartment?

• AInternal carotid artery and cranial nerves IX, X, XI, and XII
• BDeep lobe of the parotid gland and maxillary artery
• CInternal pterygoid muscle and lingual nerve
• DAscending pharyngeal artery and parapharyngeal fat pad

During extensive head and neck reconstructive surgery, a 70-kg patient receives multiple local anesthetic injections. Fifteen minutes later, the patient develops peri-oral numbness, slurred speech, generalized tonic-clonic seizures, and sudden refractory ventricular tachycardia with widening QRS complexes. Which of the following interventions represents the specific pharmacologic reversal agent for local anesthetic systemic toxicity (LAST)?

• AIntravenous calcium gluconate 10%
• BIntravenous flumazenil 0.2 mg
• CIntravenous 20% lipid emulsion
• DIntravenous sodium bicarbonate 8.4%

In surgical wound healing following cervicofacial incisions, which collagen subtype is predominantly synthesized during the early proliferative phase, and what percentage of unwounded skin tensile strength does the mature scar typically achieve at 6 to 12 weeks?

• ACollagen type I early; reaches 100% of baseline tensile strength
• BCollagen type III early; reaches approximately 80% of baseline tensile strength
• CCollagen type IV early; reaches approximately 50% of baseline tensile strength
• DCollagen type II early; reaches approximately 20% of baseline tensile strength

During a total thyroidectomy on the right lobe, the recurrent laryngeal nerve cannot be identified in its normal tracheoesophageal groove course and is discovered arising directly from the vagus nerve trunk in the neck, coursing horizontally to the cricothyroid joint. Which congenital vascular anomaly is most consistently associated with a non-recurrent right laryngeal nerve?

• AAberrant right subclavian artery (arteria lusoria)
• BA persistent left superior vena cava
• CCoarctation of the thoracic aorta
• DCongenital absence of the internal carotid artery

Which of the following bacterial pathogens is the most frequent cause of acute otitis media and acute bacterial rhinosinusitis, and what is its primary mechanism of resistance against standard aminopenicillins?

• APseudomonas aeruginosa via inducible chromosomal AmpC beta-lactamase
• BStaphylococcus aureus via production of penicillinase
• CMoraxella catarrhalis via alteration of DNA gyrase
• DStreptococcus pneumoniae via altered penicillin-binding proteins (PBPs)

In the immunopathogenesis of allergic rhinitis, which cytokine produced by type 2 helper T (Th2) cells is specifically responsible for inducing B-cell immunoglobulin class switching to IgE synthesis?

• AInterferon-gamma (IFN-gamma)
• BInterleukin-4 (IL-4)
• CInterleukin-5 (IL-5)
• DInterleukin-8 (IL-8)

During endoscopic sinus surgery, surgical control of the sphenopalatine artery (SPA) is required for severe intractable posterior epistaxis. Which bony landmark on the lateral nasal wall consistently identifies the sphenopalatine foramen through which the artery enters the nasal cavity?

• AAgger nasi cell
• BBasal lamella of the middle turbinate
• CCrista ethmoidalis of the palatine bone
• DUncinate process attachment to the lacrimal bone

A 34-year-old male presents to the emergency department with severe odynophagia, drooling, high fever, and indurated 'woody' bilateral swelling of the submandibular and submental triangles. Oral examination reveals elevation and posterior displacement of the tongue against the soft palate. The patient developed these symptoms 3 days after an untreated mandibular second molar infection. Which of the following is the immediate priority in management?

• AImmediate blind endotracheal intubation in the emergency bay
• BUrgent administration of intravenous clindamycin followed by outpatient dental follow-up
• CEmergent needle aspiration of the sublingual space under local anesthesia
• DAwake fiberoptic intubation or awake tracheostomy in theatre

A 68-year-old hypertensive male with refractory posterior epistaxis continues to bleed despite bilateral anterior and posterior nasal balloon packing. Vital signs show blood pressure 165/95 mmHg and heart rate 94 bpm. Direct examination shows active brisk pooling of blood in the posterior oropharynx behind the soft palate. What is the most definitive and effective next surgical step?

• AEndoscopic sphenopalatine artery ligation and cauterization in the operating room
• BPlacement of a third anterior ribbon gauze pack soaked in tranexamic acid
• CExternal ligation of the common carotid artery in the neck
• DAnterior ethmoidal artery ligation via Lynch incision alone

A 52-year-old previously healthy male presents with a 12-hour history of severe odynophagia, inability to swallow saliva, muffled 'hot potato' voice, and mild inspiratory stridor. On examination, he is leaning forward in a tripod position with a respiratory rate of 24 breaths/min. Pharyngeal examination shows no tonsillar enlargement or peritonsillar fullness. Which of the following is the most appropriate next step in management?

• AAggressive direct tongue blade depression to inspect the epiglottis in the emergency cubi…
• BControlled transfer to the operating room for fiberoptic airway assessment
• CSend the patient unaccompanied for emergency contrast-enhanced CT of the neck
• DDischarge home on high-dose oral amoxicillin-clavulanate with urgent outpatient follow-up

A 28-year-old male sustains a stab wound to Zone II of the right neck (between the cricoid cartilage and the angle of the mandible). On arrival, his blood pressure is 85/50 mmHg, heart rate is 128 bpm, and examination reveals a rapidly expanding pulsatile hematoma in the right neck with audible bruit and mild stridor. Which of the following is the most appropriate management plan?

• AObtain an immediate whole-body CT angiogram of the neck and chest
• BApply direct pressure and observe in the surgical intensive care unit for 24 hours
• CTransfer directly to the operating room for immediate surgical neck exploration
• DAttempt bedside percutaneous balloon catheter occlusion of the lacerated vessel

A 22-year-old female presents to the emergency department on postoperative day 7 following an uncomplicated elective bilateral tonsillectomy. She has experienced sudden brisk oral bleeding, vomiting approximately 250 mL of fresh red blood and clots. On examination in the emergency bay, active persistent arterial bleeding is noted from the left inferior tonsillar pole despite suction and application of a topical thrombin sponge. What is the most appropriate next management step?

• ATransfer to the operating room for examination under anesthesia and surgical hemostasis
• BDischarge home with oral tranexamic acid and a prescription for amoxicillin
• CAdminister oral viscous lidocaine swish and gargle and re-examine in 4 hours
• DPerform bedside blind placement of a posterior nasal pack to tamponade the fossa

A 4-year-old child presents with high fever, neck stiffness, torticollis, and painful swallowing. Lateral soft tissue neck radiography demonstrates prevertebral soft tissue widening measuring 18 mm at the level of C2 (normal < 7 mm). Cross-sectional CT confirms a retropharyngeal fluid collection with rim enhancement extending inferiorly. Through which anatomical fascial space does a retropharyngeal process have an uninterrupted conduit directly into the posterior mediastinum down to the diaphragm?

• AVisceral vascular space
• BSubmandibular space
• CPretracheal space
• DDanger space (Space 4)

A 32-year-old male is struck in the anterior neck by a hockey puck. He presents to the trauma center complaining of hoarseness, anterior neck pain, and difficulty breathing. Physical examination reveals anterior neck tenderness, flattened thyroid cartilage prominence, and palpable subcutaneous emphysema over the laryngeal framework. What is the most appropriate initial diagnostic investigation to evaluate this patient's airway?

• ABlind direct rigid laryngoscopy under rapid-sequence induction
• BFlexible fiberoptic laryngoscopy under topical anesthesia
• CBarium swallow study
• DNeedle cricothyroidotomy

A 2-year-old toddler is brought to the emergency department 1 hour after witnessed ingestion of a 20-mm lithium coin cell battery. The child is irritable and refusing all oral intake. An urgent anterior-posterior chest and neck radiograph reveals an opaque circular object lodged at the level of the cricopharyngeus with a characteristic 'double-ring' (halo) sign. What is the definitive management plan?

• AObservation in the ward for 24 hours to monitor for spontaneous gastrointestinal passage
• BAdministration of 10 mL of 10% oral neutral salt solution followed by repeat radiograph i…
• CImmediate emergent endoscopic removal in the operating room under general anesthesia
• DPlacement of a nasogastric tube to push the battery into the stomach

A 45-year-old woman wakes up with profound hearing loss and loud roaring tinnitus in her right ear. Pure-tone audiometry performed 24 hours later confirms a 45-dB sensorineural hearing loss across 500, 1000, and 2000 Hz in the right ear with normal thresholds in the left ear. Otoscopic examination is normal. After ruling out contraindications, what is the recommended first-line evidence-based pharmacologic therapy?

• AHigh-dose oral corticosteroids (e.g., prednisone 1 mg/kg/day) for 10 to 14 days
• BIntravenous acyclovir 10 mg/kg three times daily for 7 days
• COral pentoxifylline 400 mg three times daily
• DOral broad-spectrum antibiotics (amoxicillin-clavulanate) for 10 days

A 19-year-old collegiate wrestler sustains blunt trauma to his left pinna during practice, resulting in a large, fluctuant, non-tender swelling on the anterior scaphoid and triangular fossa. Which of the following pathophysiologic mechanisms explains why untreated auricular hematoma leads to permanent 'cauliflower ear' deformity?

• AInfection by Staphylococcus aureus causing septic chondritis and purulent liquefaction
• BExcessive osteoblastic activity within the auricle leading to heterotopic bone formation
• CRupture of the posterior auricular artery leading to necrosis of the temporal bone cortex
• DPerichondrium stripped from cartilage, causing ischemia and fibrocartilage overgrowth

A 58-year-old critically ill male in the intensive care unit is on postoperative day 3 following an open surgical tracheostomy. During routine repositioning, the tracheostomy tube is accidentally dislodged completely from the neck stoma. The patient becomes tachypneic and desaturates to 82%. Attempts to gently re-insert a new tracheostomy tube into the stoma meet firm resistance. What is the most appropriate immediate action?

• AForcefully advance a smaller tracheostomy tube using rigid mechanical pressure
• BCover the stoma, bag-mask ventilate from above, then intubate orally with 100% oxygen
• CPerform immediate bedside surgical re-exploration without supplementary oxygen
• DInsert a suction catheter blindly through the stoma and insufflate high-flow oxygen

A 24-year-old male presents with severe left-sided sore throat, high fever, marked trismus (mouth opening restricted to 15 mm), and left otalgia. On examination, the left superior tonsillar pillar and soft palate are bulging medially and inferiorly, displacing the uvula to the right. Which anatomical muscle's irritation is responsible for the severe trismus observed in this patient?

• AMasseter muscle
• BTemporalis muscle
• CInternal (medial) pterygoid muscle
• DSuperior pharyngeal constrictor muscle

A 21-year-old previously healthy female develops high spiking fevers, chills, right neck tenderness along the anterior sternocleidomastoid, and pleuritic chest pain one week following an episode of acute exudative pharyngotonsillitis. Contrast-enhanced CT of the neck demonstrates filling defects within the right internal jugular vein, and chest CT shows multiple peripheral nodular cavitary infiltrates. Blood cultures grow an anaerobic Gram-negative bacillus. Which microorganism is the classic causative agent of this condition (Lemierre's syndrome)?

• AFusobacterium necrophorum
• BStreptococcus pyogenes
• CBacteroides fragilis
• DPeptostreptococcus anaerobius

A 62-year-old diabetic male presents with rapidly progressive anterior neck swelling, dusky erythema, skin bullae, and severe pain out of proportion to exam findings. Palpation reveals crepitus along the anterior neck extending over the clavicles. Urgent CT reveals extensive gas along the superficial and deep cervical fascial planes. During emergency neck exploration, murky 'dishwater' fluid is encountered with minimal bleeding from necrotic fascial planes. What is the single most critical intervention that determines survival in this patient?

• AHigh-dose hyperbaric oxygen therapy sessions before operative intervention
• BIntravenous corticosteroid administration to reduce systemic tissue edema
• CSystemic antifungal therapy with voriconazole and broad-spectrum antivirals
• DImmediate extensive surgical debridement of all non-viable tissue

A 16-year-old male sustains direct nasal trauma during a soccer match. Two days later, he presents with complete nasal obstruction, frontal headache, and fever. Anterior rhinoscopy reveals bilateral, fluctuant, reddish-purple soft masses projecting from both sides of the anterior nasal septum that do not shrink following topical oxymetazoline application. What is the most critical consequence of failing to promptly drain this collection?

• ADevelopment of an olfactory groove meningioma
• BAvascular necrosis of the septal cartilage with saddle nose
• CPermanent bilateral choanal atresia
• DSpontaneous development of an uncinate process osteoma

A 35-year-old female is brought to the trauma bay after a motor vehicle collision. High-resolution temporal bone CT demonstrates a fracture line traversing the petrous pyramid perpendicular to its long axis, directly violating the cochlea and internal auditory canal. Which clinical constellation of findings is most characteristically associated with this specific temporal bone fracture pattern?

• AConductive hearing loss, intact otic capsule, and normal vestibular function
• BExternal auditory canal laceration, hemotympanum, and delayed transient facial nerve pals…
• CProfound sensorineural loss, severe vertigo and immediate facial paralysis
• DIsolated pulsatile tinnitus and conductive hearing loss with an intact ossicular chain

A 65-year-old male with an exophytic, friable T4a supraglottic squamous cell carcinoma obstructing greater than 85% of the glottic aperture presents with biphasic stridor, intercostal indrawing, and oxygen saturation of 88% on room air. The patient is unable to lie supine. Which airway management technique is the safest and most definitive method to secure his airway?

• AAwake tracheostomy under local anesthesia with the patient maintained in a semi-upright p…
• BStandard rapid sequence induction (RSI) with propofol and succinylcholine
• CBlind nasal endotracheal intubation using a lubricated bougie
• DSupraglottic laryngeal mask airway (LMA) insertion followed by high-frequency jet ventila…

A 54-year-old non-smoking male presents with a painless 3.5-cm cystic mass in the upper right neck (Level IIA). Flexible fiberoptic examination reveals a subtle, non-ulcerated submucosal fullness at the right palatine tonsil base. Fine-needle aspiration of the neck mass demonstrates squamous cell carcinoma strongly positive for p16 by immunohistochemistry. Under AJCC Version 9 staging for HPV-associated (p16-positive) oropharyngeal carcinoma, what is the clinical nodal (cN) stage of this single ipsilateral 3.5-cm lymph node without extranodal extension?

• AcN3b
• BcN2a
• CcN2c
• DcN1

A 60-year-old male smoker presents with a 4-month history of progressive hoarseness. Videolaryngostroboscopy reveals a superficial, exophytic lesion limited to the true vibrating margin of the mid-portion of the left true vocal cord. The anterior commissure and vocal process are entirely clear, and bilateral vocal cord mobility is completely normal (T1a N0 M0). When discussing definitive management, how do oncologic outcomes compare between transoral laser microsurgery (TLM) and definitive external beam radiotherapy (RT)?

• ARadiotherapy achieves significantly higher 5-year overall survival than transoral laser m…
• BBoth modalities achieve equivalent 5-year local control and overall survival rates of app…
• CTransoral laser microsurgery achieves significantly superior ultimate local control compa…
• DNeither modality is oncologically acceptable; total laryngectomy is required for definiti…

A 42-year-old female presents with a painless, slow-growing, mobile 2.5-cm mass in the superficial lobe of the right parotid gland. Core needle biopsy confirms a pleomorphic adenoma. Which of the following statements regarding the surgical management and biologic behavior of this tumor is correct?

• ASimple enucleation of the tumor capsule is the procedure of choice due to minimal recurre…
• BRadiation therapy alone is the preferred definitive primary management
• CSuperficial parotidectomy with facial nerve dissection and preservation
• DTotal parotidectomy with sacrifice of the facial nerve is mandatory due to early perineur…

A 56-year-old male presents with a painless submucosal mass at the junction of the hard and soft palate. Incisional biopsy reveals an adenoid cystic carcinoma (ACC) with a classic 'cribriform' (Swiss cheese) architectural pattern. Which of the following histopathologic and clinical characteristics is most distinctly associated with adenoid cystic carcinoma of the salivary glands?

• AExtensive perineural invasion with late distant metastases decades later
• BRapidly fatal disease within 6 months characterized by diffuse regional cervical nodal me…
• CExquisite sensitivity to low-dose chemotherapy with complete long-term remission
• DAbsence of local recurrence following standard 1-mm surgical margins

A 36-year-old female presents with a solitary 2.2-cm right thyroid nodule. High-resolution ultrasound shows a solid, hypoechoic nodule with irregular margins, microcalcifications, and a taller-than-wide shape. Fine-needle aspiration cytology demonstrates ground-glass nuclei, nuclear grooves, intranuclear cytoplasmic pseudoinclusions, and concentric laminated calcospherites (psammoma bodies). What is the definitive diagnosis?

• AMedullary thyroid carcinoma
• BAnaplastic thyroid carcinoma
• CFollicular thyroid adenoma
• DPapillary thyroid carcinoma

A 29-year-old male is diagnosed with medullary thyroid carcinoma (MTC) following workup of a thyroid nodule and elevated serum calcitonin. Genetic testing reveals a germline mutation in the RET proto-oncogene at codon 634, confirming Multiple Endocrine Neoplasia type 2A (MEN 2A). Prior to proceeding with total thyroidectomy and central neck dissection, which of the following diagnostic workups is mandatory?

• ASerum gastrin measurement to rule out Zollinger-Ellison syndrome
• BPlasma free or urinary metanephrines to exclude pheochromocytoma
• CSerum prolactin level to evaluate for pituitary adenoma
• DTotal body iodine-131 scintigraphy scan

A 55-year-old postmenopausal female with asymptomatic hypercalcemia is diagnosed with primary hyperparathyroidism. Preoperative dual-phase Tc-99m sestamibi SPECT and 4D-CT localize a solitary right inferior parathyroid adenoma. The patient undergoes focused minimally invasive parathyroidectomy. What intraoperative parathyroid hormone (PTH) kinetic criterion (Miami criterion) reliably confirms complete excision of all hyperfunctioning parathyroid tissue?

• AA decline in PTH of at least 20% from baseline at 30 minutes post-excision
• BComplete disappearance of PTH to undetectable levels (<1 pg/mL) within 5 minutes
• CA fall in intact PTH of at least 50% at 10 minutes after excision
• DSerum calcium levels dropping below 8.0 mg/dL immediately upon tumor excision

A 58-year-old male presents with a biopsy-proven squamous cell carcinoma on the lateral border of the oral tongue measuring 1.8 cm in greatest surface diameter. Palpation of the neck and high-resolution contrast CT show no evidence of regional lymphadenopathy (cN0). The final histopathologic evaluation of the primary tumor resection specimen demonstrates a depth of invasion (DOI) of 6 mm. According to current head and neck surgical oncology guidelines and the AJCC 8th edition staging system, what is the appropriate management of the clinically N0 neck?

• AElective selective neck dissection of Levels I to III (supraomohyoid neck dissection)
• BStrict clinical and ultrasonographic observation of the neck every 6 months without surge…
• CDefinitive external beam radiotherapy to the primary site and bilateral neck
• DSystemic immunotherapy with pembrolizumab alone without neck surgery

A patient with laryngeal squamous cell carcinoma undergoes a neck dissection. The surgeon removes lymph nodes from Levels II, III, IV, and V, while completely preserving the spinal accessory nerve (cranial nerve XI), the internal jugular vein, and the sternocleidomastoid muscle. According to the standardized Academy of Otolaryngology-Head and Neck Surgery classification, which neck dissection was performed?

• ARadical neck dissection (RND)
• BModified radical neck dissection Type I (MRND Type I)
• CModified radical neck dissection Type II (MRND Type II)
• DModified radical neck dissection Type III

A 44-year-old male from southern China presents with painless unilateral upper neck lymphadenopathy, unilateral serous otitis media, and intermittent epistaxis. Endoscopic examination reveals an exophytic mass arising from the fossa of Rosenmüller in the nasopharynx. Biopsy confirms non-keratinizing undifferentiated nasopharyngeal carcinoma (WHO Type 3). Which viral pathogen is etiologically linked to this malignancy, and what is the primary definitive therapeutic modality for non-metastatic locoregionally advanced disease?

• AHuman papillomavirus (HPV); radical surgical nasopharyngectomy with bilateral neck dissec…
• BEpstein-Barr virus (EBV); concurrent platinum-based chemoradiotherapy
• CCytomegalovirus (CMV); high-dose intravenous ganciclovir followed by proton beam therapy
• DHuman herpesvirus 8 (HHV-8); induction chemotherapy alone

A 62-year-old male with a 40 pack-year smoking history presents with left-sided odynophagia referred to the left ear (referred otalgia via Jacobson's or Arnold's nerve) and unintentional weight loss. Flexible laryngoscopy reveals an ulcerative mass occupying the left pyriform sinus with extension to the postcricoid mucosa and fixed left hemilarynx. Which anatomical factor contributes most to the high rate of early bilateral nodal metastases and poor overall survival in hypopharyngeal squamous cell carcinoma?

• AThe hypopharynx lacks mucosal lymphoid tissue entirely
• BThe hypopharynx contains an extremely sparse submucosal capillary network
• CAn extensive interconnected submucosal lymphatic network draining bilaterally
• DThe hypopharynx is anatomically isolated by thick muscular fascial barriers that prevent…

A 38-year-old female presents with a slow-growing, painless, pulsatile mass at the angle of the left mandible. On physical examination, the mass is mobile laterally but immobile vertically (Fontaine's sign). Contrast-enhanced MRI demonstrates a vascular tumor at the carotid bifurcation displaying a characteristic 'salt-and-pepper' appearance on T1-weighted post-contrast sequences and splaying the internal and external carotid arteries ('Lyre sign'). Which of the following is the most likely diagnosis?

• ACarotid body paraganglioma
• BPleomorphic adenoma of the parotid tail
• CVagal schwannoma
• DBranchial cleft cyst

A 62-year-old male with a 35-pack-year smoking history presents with a non-tender, doughy mass in the tail of the right parotid gland. High-resolution ultrasound shows a well-circumscribed cystic and solid mass. Fine-needle aspiration demonstrates a dual population of oncocytic epithelial cells arranged in papillary projections surrounded by a dense, mature lymphoid stroma with germinal centers. Which of the following salivary neoplasms is this?

• ALow-grade mucoepidermoid carcinoma
• BAcinic cell carcinoma of the parotid
• CParotid oncocytoma
• DWarthin tumor (cystadenoma lymphomatosum)

A 46-year-old female undergoes an uneventful total thyroidectomy and central compartment neck dissection for papillary thyroid carcinoma. On the first postoperative morning, she reports tingling around her lips (perioral paresthesia) and numbness in her fingertips. Tapping over the trunk of the facial nerve anterior to the external auditory canal produces rapid twitching of the ipsilateral facial muscles (positive Chvostek sign). What is the underlying biochemical disturbance, and what is the most appropriate initial diagnostic and therapeutic intervention?

• AHypercalcemia; administer intravenous normal saline and furosemide
• BHypocalcemia from transient hypoparathyroidism; check calcium and PTH, give oral calcium
• CHypokalemia; administer intravenous potassium chloride infusion
• DHypomagnesemia alone; administer intramuscular magnesium sulfate without checking calcium

A 32-year-old female presents with progressive bilateral hearing loss that worsened significantly during her recent pregnancy. Otoscopic examination reveals normal, translucent tympanic membranes with a faint pinkish blush over the promontory (Schwartze's sign). Tuning fork tests show negative Rinne bilaterally (bone conduction greater than air conduction) and Weber central. Pure-tone audiometry demonstrates a bilateral conductive hearing loss with a characteristic dip in bone conduction thresholds at 2000 Hz. What is this audiometric finding called, and what is the underlying diagnosis?

• ALombard effect in presbycusis
• BTullio phenomenon in superior canal dehiscence
• CCarhart's notch in otosclerosis
• DStenger effect in pseudohypacusis

A 28-year-old male with a history of recurrent childhood ear infections presents with persistent foul-smelling, painless left otorrhea and progressive hearing loss. Otomicroscopy reveals a deep retraction pocket in the pars flaccida containing cheesy squamous debris and crusting, with erosion of the lateral epitympanic wall (scutum). High-resolution temporal bone CT confirms soft tissue opacification in the Prussak space with erosion of the scutum and the long process of the incus. What is the fundamental pathophysiology of this condition (acquired cholesteatoma)?

• AKeratinizing squamous epithelium expanding in the middle ear and mastoid
• BBenign neoplastic transformation of non-myelinating Schwann cells within the tympanic ple…
• CCongenital persistence of embryologic neural crest cells at the geniculate ganglion
• DSquamous cell carcinoma arising from the mucosa of the Eustachian tube

A 52-year-old female presents with brief episodes of intense spinning vertigo lasting 15 to 30 seconds, triggered whenever she turns her head to the right in bed or looks upward to reach a high shelf. There is no associated hearing loss, tinnitus, or focal neurologic deficit. When the examiner places the patient into the right Dix-Hallpike position, there is a 4-second latency followed by a 20-second burst of paroxysmal upbeat, torsional nystagmus (top poles beating toward the right dependent ear). What is the affected semicircular canal, and what is the first-line therapeutic maneuver?

• ARight horizontal canal; Lempert (barbecue roll) maneuver
• BLeft posterior canal; Semont liberatory maneuver for the left ear
• CRight superior (anterior) canal; Gufoni maneuver
• DRight posterior semicircular canal; Epley particle repositioning maneuver

A 44-year-old male presents with recurrent spontaneous episodes of severe rotational vertigo lasting between 2 and 4 hours, accompanied by nausea, vomiting, a sense of fullness in his left ear, and fluctuating low-pitched tinnitus. Serial audiograms show documented fluctuating sensorineural hearing loss at 250, 500, and 1000 Hz in the left ear with normal hearing in the right. Neurologic examination and gadolinium-enhanced brain MRI are normal. According to international diagnostic consensus criteria, what is the diagnosis and initial maintenance medical regimen?

• AVestibular migraine; topiramate and sumatriptan
• BMeniere's disease; sodium restriction and a thiazide diuretic
• CBenign paroxysmal positional vertigo; daily vestibular rehabilitation exercises
• DVestibular schwannoma; surgical retrosigmoid craniotomy

A 50-year-old male presents with progressive right-sided hearing loss over 18 months and mild imbalance without true rotational vertigo. Pure-tone audiometry reveals asymmetric high-frequency sensorineural hearing loss on the right with a speech discrimination score (word recognition) of 36% at 80 dB, despite a pure-tone average of only 45 dB. Contrast-enhanced MRI reveals a 1.6-cm homogeneously enhancing mass centered within the right internal auditory canal and extending into the cerebellopontine angle. From which nerve branch does this benign neoplasm most commonly originate?

• AFacial nerve (cranial nerve VII)
• BCochlear nerve
• CInferior vestibular nerve
• DGlossopharyngeal nerve (cranial nerve IX)

A 64-year-old hypertensive male presents to the emergency room with acute, continuous spinning vertigo, severe nausea, and gait unsteadiness of 6 hours' duration. He has no prior history of vertigo. On physical examination, spontaneous horizontal nystagmus is present. The emergency physician performs the three-component bedside HINTS examination (Head Impulse, Nystagmus, Test of Skew). Which of the following findings on the HINTS exam strongly indicates a central acute ischemic stroke (e.g., PICA or AICA infarction) rather than benign peripheral vestibular neuritis?

• AA normal (negative) horizontal head impulse test without corrective catch-up saccades in…
• BA unidirectional, horizontal-torsional nystagmus that increases in intensity when looking…
• CThe complete absence of vertical skew deviation on alternating cover testing
• DSuppression of nystagmus with visual fixation