Free Practice Questions for ENT Board

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Sample ENT Board Practice Questions

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1During 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?

A.The spine of Henle on the lateral mastoid cortex

B.The horizontal semicircular canal

C.The anterior border of the digastric ridge

D.The chorda tympani nerve at its intratympanic course

Explanation: The digastric ridge is one of the most reliable and constant landmarks for identifying the vertical segment of the facial nerve as it exits the temporal bone. By tracing the digastric ridge anteriorly and medially, the surgeon encounters the facial nerve at the stylomastoid foramen, just deep and superior to the anterior attachment of the posterior belly of the digastric muscle. This landmark remains identifiable even in ears distorted by extensive cholesteatoma or previous trauma.

2The 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?

A.Deiters cells in the organ of Corti

B.Marginal cells of the stria vascularis

C.Basal cells of the spiral ligament

D.Interdental cells of the spiral limbus

Explanation: The stria vascularis along the lateral wall of the scala media is responsible for generating the +80 mV endocochlear potential and pumping potassium into the endolymph. Marginal cells face the scala media and utilize Na+/K+-ATPase pumps and the KCNQ1/KCNE1 potassium channel complex to actively secrete K+ against a high concentration gradient. Dysfunction or degeneration of the stria vascularis causes strial (metabolic) presbycusis and hearing loss.

3Which of the following statements regarding the molecular physiology of the human olfactory neuroepithelium is correct?

A.Olfactory sensory neurons are pseudounipolar cells that do not regenerate after birth

B.Odorant binding directly opens voltage-gated sodium channels without second messenger cascades

C.Supporting (sustentacular) cells act as the stem cells that continuously replace mature olfactory neurons

D.Odorant receptors are G-protein-coupled receptors that activate adenylyl cyclase type III to generate cyclic AMP

Explanation: Human odorant receptors are seven-transmembrane G-protein-coupled receptors (GPCRs). Upon odorant binding, they activate the specialized olfactory G-protein (Golf), which stimulates adenylyl cyclase III (ACIII) to synthesize cyclic AMP (cAMP). Elevated cAMP then gates cyclic nucleotide-gated (CNG) cation channels, causing calcium and sodium influx followed by calcium-activated chloride channel efflux, leading to cell depolarization.

4A 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?

A.Internal carotid artery and cranial nerves IX, X, XI, and XII

B.Deep lobe of the parotid gland and maxillary artery

C.Internal pterygoid muscle and lingual nerve

D.Ascending pharyngeal artery and parapharyngeal fat pad

Explanation: The parapharyngeal space is divided by the styloid process and its attached muscles into prestyloid and poststyloid (retrostyloid) compartments. The poststyloid space contains the internal carotid artery, internal jugular vein, cranial nerves IX (glossopharyngeal), X (vagus), XI (accessory), and XII (hypoglossal), as well as the cervical sympathetic trunk and deep cervical lymph nodes. Neoplasms arising here are typically schwannomas, neurofibromas, or paragangliomas.

5During 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)?

A.Intravenous calcium gluconate 10%

B.Intravenous flumazenil 0.2 mg

C.Intravenous 20% lipid emulsion

D.Intravenous sodium bicarbonate 8.4%

Explanation: Intravenous 20% lipid emulsion is the specific rescue therapy for local anesthetic systemic toxicity (LAST). It acts as a 'lipid sink' to extract lipophilic local anesthetics (such as bupivacaine) from plasma and cardiac tissue while directly facilitating myocardial fatty acid metabolism and augmenting cardiac ion channel function. Standard dosing begins with an initial bolus of 1.5 mL/kg over 1 minute followed by a continuous infusion of 0.25 mL/kg/min.

6In 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?

A.Collagen type I early; reaches 100% of baseline tensile strength

B.Collagen type III early; reaches approximately 80% of baseline tensile strength

C.Collagen type IV early; reaches approximately 50% of baseline tensile strength

D.Collagen type II early; reaches approximately 20% of baseline tensile strength

Explanation: During the proliferative phase of wound healing, fibroblasts rapidly synthesize collagen type III, which provides early structural framework. Over the remodeling (maturation) phase, type III collagen is systematically replaced by the stronger, more cross-linked collagen type I. Normal healed human skin wounds never regain 100% of their pre-injury tensile strength, plateauing at a maximum of approximately 70% to 80% of original baseline strength by 6 to 12 weeks to one year.

7During 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?

A.Aberrant right subclavian artery (arteria lusoria)

B.A persistent left superior vena cava

C.Coarctation of the thoracic aorta

D.Congenital absence of the internal carotid artery

Explanation: A non-recurrent right laryngeal nerve occurs in 0.5% to 1% of individuals and is almost universally associated with an aberrant right subclavian artery (arteria lusoria). Embryologically, this anomaly results from involution of the normal fourth right aortic arch; the right subclavian artery then arises distally from the descending aorta and courses retroesophageally. Lacking the fourth aortic arch to drag the nerve into the mediastinum during cardiac descent, the nerve courses directly transversely into the larynx.

8Which 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?

A.Pseudomonas aeruginosa via inducible chromosomal AmpC beta-lactamase

B.Staphylococcus aureus via production of penicillinase

C.Moraxella catarrhalis via alteration of DNA gyrase

D.Streptococcus pneumoniae via altered penicillin-binding proteins (PBPs)

Explanation: Streptococcus pneumoniae remains the most common bacterial isolate in community-acquired acute otitis media and acute bacterial rhinosinusitis. Unlike Staphylococci or Moraxella, S. pneumoniae does not produce beta-lactamase; its resistance to aminopenicillins is mediated by genetic mutations in genes encoding penicillin-binding proteins (PBP 1a, 2x, 2b), which decrease antibiotic binding affinity. High-dose amoxicillin (80-90 mg/kg/day) is used clinically to saturate these altered target proteins.

9In 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?

A.Interferon-gamma (IFN-gamma)

B.Interleukin-4 (IL-4)

C.Interleukin-5 (IL-5)

D.Interleukin-8 (IL-8)

Explanation: Interleukin-4 (IL-4), together with Interleukin-13 (IL-13), provides the essential signal for naive B cells to undergo immunoglobulin class switching from IgM/IgD to IgE. Once produced, antigen-specific IgE binds with high affinity to Fc-epsilon-RI receptors on mast cells and basophils, priming them for immediate degranulation upon subsequent allergen exposure.

10During 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?

A.Agger nasi cell

B.Basal lamella of the middle turbinate

C.Crista ethmoidalis of the palatine bone

D.Uncinate process attachment to the lacrimal bone

Explanation: The crista ethmoidalis of the vertical plate of the palatine bone is the definitive surgical landmark for the sphenopalatine foramen. The foramen lies immediately posterior to the crista ethmoidalis at the posterior junction of the middle meatus and superior meatus. Identifying the crista ethmoidalis allows the surgeon to safely elevate mucosal flaps and dissect all branches of the sphenopalatine artery prior to clip application or electrocautery.

About the ENT Board Exam

Independent English-language MCQ study adaptation by OpenExamPrep. This independent practice question bank covers basic clinical science, general and emergency ENT, head and neck surgery, neurotology/otology/audiology, rhinology and allergy, pediatric and laryngology, and facial plastic/reconstruction. This resource is an independent MCQ study aid prepared by OpenExamPrep for the written examination and is not affiliated with or endorsed by the Saudi Commission for Health Specialties (SCFHS). It does not simulate the clinical OSCE or structured oral exam.

Exam sponsor: Saudi Commission for Health Specialties (SCFHS). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

Time Limit

Not published by SCFHS

Passing Score

70% (lowered to minimum 65% if pass rate under 70%)

Exam / Certification Fees

Not published by SCFHS

Exam sponsor website

Reported exam pass rate: Not published by SCFHS. SCFHS publishes no candidate pass rate. The blueprint instead sets the passing score at 70% and, if fewer than 70% of candidates pass before final approval, lowers that score one mark at a time until a 70% pass rate is reached or the score reaches 65%, whichever comes first; it is never lowered below 65%. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Basic Clinical Science

Head and neck surgical anatomy, physiology, pharmacology, microbiology, immunology, and wound healing.

17%

General and Emergency

Acute airway compromise, epistaxis, deep neck space infections, ENT trauma, perioperative critical care, and medical ethics.

14%

Head and Neck

Benign and malignant neoplasms of the upper aerodigestive tract, salivary gland disorders, thyroid/parathyroid surgery, and neck dissection.

17%

Neurotology, Otology, and Audiology

Otologic pathology, chronic otitis media, cholesteatoma, otosclerosis, vestibular disorders, facial nerve pathology, and audiological diagnostics.

14%

Rhinology and Allergy

Chronic rhinosinusitis, nasal polyposis, endoscopic sinus surgery, skull base lesions, allergic rhinitis, and olfactory disorders.

18%

Pediatric and Laryngology

Pediatric airway anomalies, congenital head and neck masses, pediatric otitis media, voice and swallowing disorders, and benign vocal fold lesions.

10%

Plastic and Reconstruction

Facial plastic surgery, rhinoplasty, local/regional flaps, microvascular free tissue transfer principles, and facial trauma reconstruction.

Preparing for the ENT Board Exam

What You Need to Know

Passing score: 70% (lowered to minimum 65% if pass rate under 70%)
Assessment: Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.
Time limit: Not published by SCFHS
Exam / certification fees: Not published by SCFHS Official sources

Using Our Practice Resources

Work through all 100 available questions
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ENT Board: Suggested Study Strategy

1Focus heavily on emergency management, including acute stridor, severe epistaxis, and penetrating neck trauma protocols.

2Review temporal bone anatomy and high-resolution CT imaging features for cholesteatoma and otosclerosis.

3Master staging and multidisciplinary management algorithms for head and neck squamous cell carcinomas.

4Practice high-yield clinical vignettes balancing diagnostic workups with definitive surgical indications.

Frequently Asked Questions

What is the format of the Saudi Board Otorhinolaryngology final examination?

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

What is the passing score for the Saudi Board ENT written exam?

The passing score is set at 70%. If fewer than 70% of candidates achieve this score, the passing mark is lowered incrementally toward achieving a 70% pass rate, down to a strict minimum cut-off of 65%.

Does this practice bank include OSCE preparation?

This bank is an independent English-language MCQ study adaptation for the written examination. It does not simulate or replace the separate mandatory final clinical/practical assessment. Consult the specialty clinical blueprint for its station formats and any structured oral or OSCE components.

Free Practice Questions for ENT Board

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