EN3.1-3 | ENT Diagnostic Procedures — Graded Quiz

Correct. Oto-microscopy provides 6×–40× magnification and frees both hands for instrument use. It is indicated when aural toilet, detailed assessment of a retraction pocket, or foreign body removal under magnified vision is required — as in CSOM.

Oto-microscopy is indicated when magnification and bimanual dexterity are required — CSOM with cholesteatoma, aural toilet, pars flaccida retraction, foreign body removal under vision. Routine auriscopy suffices for screening.

Audiometry is an audiological test, not related to microscopy. Screening examinations use a hand-held auriscope. Eustachian tube function is assessed by tympanometry or Valsalva. The key indication is magnification combined with bimanual instrumentation.

Correct. The pars flaccida (Shrapnell's membrane) is examined first because attic retraction pockets and cholesteatoma — the 'unsafe' variety of CSOM — originate here. Missing this area is a clinically dangerous omission.

Systematic TM examination begins superiorly at the pars flaccida — this is where attic retraction pockets and early cholesteatoma most commonly occur. A missed pars flaccida lesion is a clinically dangerous omission. After the pars flaccida: pars tensa quadrants (anterior superior, posterior superior, anterior inferior, posterior inferior) and the umbo.

The posterior inferior quadrant is examined as part of the pars tensa survey. The cone of light (anteroinferior) is a normal landmark examined during the pars tensa survey. The umbo is assessed last or as part of the pars tensa central assessment.

Correct. Sensorineural hearing loss is an audiological problem investigated by pure tone audiometry, speech audiometry, OAE, and auditory brainstem response — it has no nasal endoscopic indication. DNE evaluates nasal and nasopharyngeal pathology.

DNE indications: CRS/OMC assessment, epistaxis (posterior), nasopharyngeal mass biopsy, assessment of nasal polyps, post-FESS follow-up, foreign body, CSF rhinorrhoea. Sensorineural hearing loss is investigated by audiometry and ABR — not endoscopy.

All other options are valid indications for DNE. OMC assessment for CRS, posterior epistaxis localisation, and nasopharyngeal mass biopsy are all performed under nasal endoscopy.

Correct. Unilateral nasal polyposis in an adult should always raise the suspicion of inverted papilloma (which has a 2–5% malignant transformation rate) or early sino-nasal malignancy. Any unilateral polyp must be sent for histopathology. Simple inflammatory/eosinophilic polyps are almost invariably bilateral.

Key ENT nasal trap: nasal polyps are almost always bilateral in simple eosinophilic/allergic cases. UNILATERAL polyp (especially in a middle-aged or older male) must be biopsied to exclude inverted papilloma (premalignant) or malignancy. Antrochoanal polyp is unilateral but is a distinct solitary polyp from the maxillary antrum, not a polyp cluster in the middle meatus.

Allergic fungal sinusitis typically produces bilateral, recurrent polyps. Simple eosinophilic polyposis is bilateral. The antrochoanal polyp arises as a single mass from the maxillary antrum and passes to the choana — it is unilateral and solitary but its appearance and origin are distinct from a cluster of middle meatus polyps.

Correct. The 3-week rule is a cornerstone of ENT clinical practice: hoarseness persisting beyond 3 weeks in an adult mandates laryngoscopy to exclude laryngeal carcinoma. Delaying investigation risks missing a curable early-stage glottic lesion.

Cardinal ENT rule (Dhingra/Hazarika): any adult with hoarseness >3 weeks must have laryngoscopy performed to exclude laryngeal carcinoma. This rule is non-negotiable. Post-URTI hoarseness resolving within 3 weeks is expected; persistence mandates investigation.

Voice rest and steam inhalation without laryngoscopy is dangerous for persistent hoarseness — this approach misses early laryngeal cancer. Laryngomalacia is a congenital cause of inspiratory stridor in neonates, not hoarseness lasting 3 weeks in a child. Post-URTI hoarseness that persists beyond 3 weeks is NOT normal and requires investigation.

Correct. The glottis comprises the true vocal folds and the anterior commissure. Glottic carcinoma arises from the squamous epithelium of the true vocal fold — it presents early with hoarseness because any lesion on the phonatory surface alters voice. This anatomical precision is tested in examinations.

Laryngeal anatomy (NMC-exam essential): Supraglottis = epiglottis, aryepiglottic folds, arytenoids, false cords, laryngeal ventricles. Glottis = true vocal folds + anterior commissure (± posterior commissure). Subglottis = 5 mm below free edge of true folds to lower border of cricoid. Glottic carcinoma arises from true vocal fold squamous mucosa.

The region above the true vocal folds (epiglottis, aryepiglottic folds, arytenoids, false cords) is the supraglottis. The subglottis is 5 mm below the free edge of the true cords to the lower border of the cricoid. The laryngeal ventricle and false cords are part of the supraglottis.

Correct. The trans-nasal flexible scope follows the anatomical route: nasal cavity → nasopharynx → oropharynx → hypopharynx → larynx. This systematic progression ensures no region is omitted and allows assessment of all structures from the anterior nares to the subglottis in a single pass.

Standard flexible nasopharyngolaryngoscopy sequence (trans-nasal): (1) inferior turbinate level, general nasal survey; (2) middle meatus (pass 2 if DNE indicated); (3) advance to nasopharynx — posterior choanae, Eustachian tube orifices, adenoid pad; (4) descend over the soft palate to oropharynx; (5) hypopharynx — pyriform fossae, posterior pharyngeal wall; (6) larynx — supraglottis, glottis, subglottis.

The hypopharynx and larynx cannot be assessed before passing through the nasal cavity and nasopharynx with a flexible trans-nasal scope. A retrograde approach is not a standard clinical technique. Passing directly from nasal cavity to larynx without assessing the nasopharynx and hypopharynx would miss important pathology in those regions.

Correct. Contact granuloma (or intubation granuloma / contact ulcer) classically appears as a bilateral, sessile, reddish-pink granulomatous mass overlying the vocal process of the arytenoid (posterior third of the true vocal fold). Its bilateral occurrence, sessile nature and posterior location distinguish it from a vocal cord polyp.

Contact granuloma (intubation granuloma/contact ulcer): bilateral sessile granulomatous lesion overlying the vocal process of the arytenoid — the posterior one-third of the true vocal fold. Caused by intubation trauma or laryngopharyngeal reflux. Polyps are at the anterior junction; Reinke's oedema is diffuse; leukoplakia is a white keratotic patch (premalignant).

A pedunculated translucent lesion at the anterior junction is a vocal fold polyp. A white keratotic plaque along the medial edge is leukoplakia (premalignant). Diffuse fusiform swelling of the entire vocal fold is Reinke's oedema (associated with smoking/hypothyroidism).

Correct. Bilateral glistening, smooth, polypoidal masses arising from the middle meatus without bone destruction are the characteristic appearance of simple inflammatory (eosinophilic) nasal polyps. The clinical triad of nasal obstruction, post-nasal drip and anosmia supports this diagnosis. Bilateral appearance strongly favours benign inflammatory polyps over malignant or neoplastic pathology.

Nasal polyps: bilateral, glistening, grape-like, avascular, insensitive masses arising from the middle meatus — classic appearance of simple inflammatory/eosinophilic polyps. No bone destruction. JNA is unilateral in adolescent males with epistaxis. Inverted papilloma is unilateral. Carcinoma has bone destruction on imaging.

Inverted papilloma is almost always unilateral and tends to arise from the lateral nasal wall. JNA is unilateral, appears in adolescent males and presents with epistaxis — it would not be bilateral. Sino-nasal carcinoma is typically unilateral and is associated with bone destruction on CT imaging.

Correct. In a patient with a hypersensitive gag reflex who cannot tolerate a trans-oral examination, the flexible nasopharyngolaryngoscope is preferred because it enters through the nose — largely bypassing the gag reflex — and can be performed with topical nasal anaesthesia alone. The rigid 70° scope requires placement in the oropharynx with tongue traction, which is poorly tolerated in patients with an active gag.

Flexible scope advantages: trans-nasal (avoids gag reflex), simultaneously assesses nasal cavity and nasopharynx, can be used in awake/less compliant patients. Rigid 70° scope advantages: superior resolution, compatible with stroboscopy, better anterior commissure visualisation. Key decision: patient tolerance vs image quality.

Stroboscopic assessment (LVS) requires the rigid 70° Hopkins rod with a stroboscopic light source — flexible scopes have lower resolution and are generally not used for LVS. The anterior commissure is better visualised with the rigid scope. Laryngovideostroboscopy specifically employs the rigid 70° scope.