Otorhinolaryngology — Distinction Notes
Questions 1 to 5 | Detailed exam writing | Compact A4 two-column format
Q1. Fill in the blanks
  • Mickulicz cells are seen in Rhinosporidiosis.
  • Picket fence fever is seen in lateral sinus thrombosis.
  • Most common site for otosclerosis is the fissula ante fenestram / stapes footplate region.
  • Rising sun sign is seen in glomus tumour.
  • Steeple sign is seen in laryngotracheobronchitis (croup).
  • Length of Eustachian tube in adults is about 36 mm.
Memory hook: Rhinosporidiosis has Mickulicz cells; croup gives steeple sign; glomus tumour gives rising sun sign.
Q2. Answer the following
i) True regarding singer’s nodule
  • It occurs at the junction of anterior 1/3 and posterior 2/3 of the true vocal cord.
Singer’s nodules are bilateral, symmetric, callus-like lesions at the point of maximal vibration. They are caused by voice abuse and are commonly managed initially by voice rest and speech therapy.
ii) Nasal valve is bounded by all except
  • Lower border of lower lateral cartilage — EXCEPT
The nasal valve area is formed by the septum medially, upper lateral cartilage laterally, and the floor / head of inferior turbinate inferiorly. It is the narrowest part of the nasal airway and a major site of airflow resistance.
iii) Which sinus grows till early adulthood
  • Maxillary sinus
The maxillary sinus continues to enlarge till early adulthood. Frontal sinus develops later in childhood and sphenoid pneumatizes progressively.
iv) Which of the following is not a branch of external carotid artery in Kiesselbach’s plexus
  • Anterior ethmoidal artery
Kiesselbach’s plexus is formed by the anterior ethmoidal artery (from ICA), sphenopalatine artery, greater palatine artery and septal branch of superior labial artery. The anterior ethmoidal artery is the non-ECA component.
Memory hook: Singer’s nodule = junction of 1/3 and 2/3; nasal valve is not bounded by lower border of lower lateral cartilage; maxillary sinus grows till adulthood; Kiesselbach has one ICA branch — anterior ethmoidal.
Q3. A 5-year-old boy with cough, breathing difficulty, chest retraction and history of eating peanuts
a) Differential diagnosis
  • Foreign body aspiration — most likely
  • Bronchial asthma / wheezy child
  • Acute bronchiolitis
  • Laryngotracheobronchitis / croup
  • Pneumonia
  • Anaphylaxis / allergic airway edema
A sudden onset of cough and breathing difficulty after eating peanuts is highly suggestive of aspiration of a bronchial foreign body, especially because peanuts are a common organic foreign body.
b) Evaluation
  • Assess airway, breathing, circulation immediately
  • Check respiratory rate, stridor / wheeze, use of accessory muscles, chest movement, saturation
  • Detailed history:
    • choking episode
    • asphyxia / coughing fit
    • type of food or object
    • time since aspiration
  • Examination:
    • inspection of chest symmetry
    • auscultation for unilateral decreased air entry / wheeze
    • signs of mediastinal shift if severe obstruction
  • Investigations:
    • Chest X-ray: inspiratory/expiratory or decubitus views
    • May show unilateral hyperinflation, atelectasis, mediastinal shift
    • Rigid bronchoscopy is both diagnostic and therapeutic
c) Management plan
  • Emergency stabilization with oxygen and monitoring
  • If complete upper airway obstruction: back blows / chest thrusts depending on age and condition
  • Definitive removal by rigid bronchoscopy under general anesthesia
  • Maintain airway and be ready for suctioning, ventilation and pediatric anesthesia support
  • Post-removal observation for edema, bronchospasm, bleeding and residual obstruction
  • Antibiotics only if secondary infection develops
d) Complications of the management procedure
  • Laryngospasm
  • Bronchospasm
  • Hypoxia / desaturation
  • Mucosal trauma and bleeding
  • Foreign body displacement to distal bronchus
  • Pneumothorax / mediastinal emphysema
  • Post-procedure laryngeal edema
  • Anesthetic complications
e) Risk age group and why
  • Age group: 1–3 years, especially toddlers
  • Reason:
    • exploratory oral behaviour
    • incomplete molar grinding
    • immature swallowing coordination
    • small airway caliber
    • playful eating / running while eating
Memory hook: Toddler + peanuts + sudden cough = foreign body aspiration until proven otherwise.
Q4. Write briefly on (Any Five)
a) Prussak’s space boundaries
  • Prussak’s space is a small epitympanic space in the middle ear
  • Laterally: pars flaccida (Shrapnell’s membrane)
  • Medially: neck of malleus / malleal neck region and lateral malleolar fold area
  • Superiorly: lateral malleolar ligament
  • Inferiorly: upper part of pars tensa / lateral process of malleus region
  • Clinical importance: common site of acquired cholesteatoma formation
b) Hearing test
  • Bedside tests: whisper test, voice test, tuning fork tests (Rinne, Weber, absolute bone conduction)
  • Pure tone audiometry (PTA): gold standard to measure hearing threshold and type of hearing loss
  • Impedance audiometry: tympanometry and stapedial reflex to assess middle ear function
  • OAE: cochlear outer hair cell function screening, useful in newborn hearing screening
  • BERA / ABR: objective assessment of auditory pathway up to brainstem, especially in infants
c) Meniere’s disease
  • Disorder of the inner ear due to endolymphatic hydrops
  • Classic triad: episodic vertigo, fluctuating sensorineural hearing loss, tinnitus / aural fullness
  • Attacks last minutes to hours and may be associated with nausea and vomiting
  • Management: low-salt diet, diuretics, vestibular suppressants during attacks, betahistine / symptomatic therapy, intratympanic therapy or surgery in refractory cases
d) Ranula
  • Mucous extravasation cyst arising from the sublingual gland
  • Located in the floor of mouth and appears bluish, translucent and cystic
  • Types: simple ranula and plunging ranula
  • Features: painless floor-of-mouth swelling, may interfere with speech, swallowing or tongue movement
  • Treatment: marsupialization, excision of cyst with sublingual gland in recurrent cases; plunging ranula may need combined intraoral / cervical approach
e) Woodruff’s plexus
  • Venous plexus located in the posterior part of the inferior meatus / posterior lateral wall of the nose
  • Important source of posterior epistaxis in adults
  • Bleeding may be profuse and difficult to visualize directly
  • Management: posterior packing, endoscopic cauterization or vessel control when required
f) Deviated nasal septum
  • Deviation of nasal septum from midline causing nasal obstruction or symptoms
  • Causes: developmental, traumatic, compressive, congenital
  • Symptoms: nasal blockage, mouth breathing, snoring, recurrent sinusitis, epistaxis, headache, hyposmia
  • Signs: septal deviation, spur, turbinate hypertrophy, contact point
  • Treatment: septoplasty / SMR in selected patients with symptomatic obstruction
Memory hook: Prussak’s space is the cholesteatoma pocket; Woodruff’s plexus causes posterior epistaxis; DNS is septum off the midline.
Q5. Explain why (Any Three)
a) HRCT temporal bone is done in unsafe COM
  • Unsafe COM is usually associated with cholesteatoma and can cause bone erosion and complications.
  • HRCT temporal bone precisely defines:
    • extent of disease
    • ossicular erosion
    • scutum destruction
    • tegmen erosion
    • facial canal dehiscence
    • lateral semicircular canal / labyrinthine fistula
    • mastoid aeration and intracranial extension
  • It helps in surgical planning, choice of mastoid procedure and anticipating complications.
HRCT is not for diagnosis alone; it is mainly for mapping disease and planning safe surgery.
b) Tobacco and betel nut chewing lead to oral cavity carcinoma
  • Tobacco contains carcinogenic nitrosamines and polycyclic hydrocarbons that damage mucosal DNA.
  • Betel nut (areca nut) has alkaloids such as arecoline, which cause chronic irritation and fibrosis.
  • Slaked lime increases absorption of areca alkaloids and enhances mucosal injury.
  • The combination causes oral submucous fibrosis, epithelial dysplasia and eventually squamous cell carcinoma.
  • Chronic chewing produces leukoplakia, erythroplakia and recurrent epithelial trauma, all of which increase malignant transformation risk.
c) Diagnosis of otosclerosis is based on clinicoaudiological features
  • Typical patient: young adult, more often female, with slowly progressive conductive hearing loss
  • Clinical clues: positive family history, paracusis Willisii, tinnitus, normal tympanic membrane, sometimes Schwartze sign
  • PTA: conductive hearing loss with air-bone gap; Carhart notch around 2 kHz may be seen
  • Impedance audiometry: reduced compliance / type As tympanogram, absent stapedial reflex
  • Diagnosis is strengthened by history, otoscopy and audiological tests; CT may be used in selected atypical cases
  • Definitive treatment options include hearing aid or stapes surgery
d) Foul-smelling discharge in unsafe COM
  • Unsafe COM usually means atticoantral disease with cholesteatoma.
  • Cholesteatoma contains keratin debris which becomes infected and decomposes.
  • The disease often harbours mixed bacterial infection, including anaerobes and organisms like Pseudomonas / Proteus.
  • Bone erosion and dead tissue further increase chronic infection and produce characteristic fetid discharge.
  • Therefore, foul smell in ear discharge is a red flag for unsafe disease and possible cholesteatoma.
Memory hook: Unsafe COM smells foul because cholesteatoma holds dead keratin, infection and bone destruction.
Q6. A 35-year-old female with bilateral nasal blockage for 5 years; endoscopy shows grape-like glistening masses in both nasal cavities
a) Probable diagnosis and differentials
Bilateral pale, smooth, glistening, grape-like masses strongly favour nasal polyps. Antrochoanal polyp is usually unilateral, single and posteriorly directed.
b) Etiopathogenesis
c) Clinical features
Memory hook: Bilateral pale grape-like nasal masses with smell loss = ethmoidal polyposis until proved otherwise.
d) Further evaluation
e) Management and follow-up
Memory hook: Polyps are treated by calming inflammation first, then endoscopically removing disease if needed.
Q7. Write briefly on (Any Five)
a) Otomycosis
Memory hook: Otomycosis is the itchy fungal ear of humid climates.
b) Cochlear implant
Memory hook: Cochlear implant is an artificial hearing pathway for the deaf ear.
c) Obstructive sleep apnea
Memory hook: OSA is snoring with pauses and daytime tiredness.
d) Investigations for dysphagia
Memory hook: Dysphagia work-up asks where the block is, why it is blocked and whether it is structural or motility-related.
e) Management of foreign body airway
Memory hook: Airway foreign body = first save breath, then remove the object.
f) Rhino-orbital-cerebral mucormycosis
Memory hook: Mucormycosis is the black fungal emergency that spreads from nose to orbit to brain.
Q8. Write short notes on
a) Counselling about the hazards of tobacco to school children
Memory hook: Tobacco steals breath, voice, teeth, stamina and future health.
b) Ototoxicity
Memory hook: Ototoxicity attacks hearing first and balance next, often because of drugs.
c) Management of epistaxis
Memory hook: Epistaxis is treated front to back — pressure, cautery, packing and then surgery if needed.
d) Indications and complications of tonsillectomy
Memory hook: Tonsillectomy is done for repeated infection or obstruction, and bleeding is its most feared complication.
Q3. Clinical case study: 45-year-old man with persistent bilateral nasal obstruction and bilateral smooth glistening grape-like masses
a) Diagnosis and differentials
Bilateral pale, smooth, glistening, grape-like masses strongly suggest inflammatory nasal polyps. Antrochoanal polyp is usually unilateral.
b) Etiopathogenesis
Memory hook: Chronic inflammation → mucosal edema → polyp formation.
c) Clinical features
Memory hook: Bilateral pale grape-like nasal masses with smell loss = ethmoidal polyposis.
d) Investigations and management
Memory hook: Polyps are treated by calming inflammation first and removing disease endoscopically if needed.
Q5. Explain why / justify rationality of treatment, investigation or diagnosis (Any 3)
a) Nerve supply of external auditory canal
This mixed nerve supply explains why ear disease may produce pain, cough reflex or referred pain from the jaw, throat or neck.
b) Diagnosis and treatment of otosclerosis
Memory hook: Otosclerosis = young adult conductive deafness with normal drum and absent stapedial reflex.
c) Treatment of BPPV
Treatment is mechanical because the problem is a displaced crystal, not a persistent infection or tumour.
d) Diagram of organ of Corti
e) Surgical management of Meniere’s disease
Surgery is used only for refractory cases because Meniere’s disease is primarily a chronic inner ear disorder with fluctuating symptoms.
Q6. Structured essay: Cholesteatoma
a) Etiology / theories
The retraction pocket theory is the most accepted for acquired cholesteatoma.
b) Pathology of cholesteatoma
c) Complications
d) Clinical features, diagnosis and management
Memory hook: Cholesteatoma = destructive keratin sac in middle ear causing foul discharge, hearing loss and serious complications.
Q7. Write short notes on (Any 3)
a) Malignant otitis externa
Memory hook: Malignant otitis externa is the dangerous diabetic ear infection.
b) Mucormycosis
Memory hook: Mucormycosis is the black fungal emergency of diabetics.
c) Blood supply of nasal septum
d) Differences between septoplasty and SMR
Memory hook: Malignant otitis externa = diabetic skull base infection; mucormycosis = black fungal emergency; septal blood supply explains epistaxis; septoplasty is conservative, SMR more radical.