17.2 ENT, Ophthalmology & Dental Surgery
Key Takeaways
- Otitis media, sinusitis, and tonsillitis are the ENT triad most tested at BHMS level — separate acute infection from complications (mastoiditis, quinsy, orbital spread)
- Cataract is opacity of the lens with gradual painless vision loss; glaucoma hinges on optic neuropathy with raised IOP risk and acute angle-closure emergency cues
- Conjunctivitis is distinguished as bacterial, viral, or allergic by discharge character and itch/contagion clues
- Dental stems focus on caries, pulpitis, abscess, and basic extraction/bleeding aftercare — not full oral surgery fellowship detail
- Red-flag ENT/eye signs (proptosis with fever, sudden painful red eye with halos, airway-threatening quinsy) demand urgent referral language
17.2 ENT, Ophthalmology & Dental Surgery
Quick Answer: Allied specialty stems ask you to recognize common ENT, eye, and dental diseases at first-contact BHMS depth — then spot complications (mastoiditis, quinsy, orbital cellulitis, acute angle-closure glaucoma, Ludwig's angina, dry socket). Depth is triage and classic presentation, not microsurgery or phacoemulsification steps.
Allied specialty items in the surgery paper reward pattern recognition: which infection is still outpatient-manageable, and which has crossed into airway, orbit, intracranial, or vision-threatening territory.
| Domain | Core diseases | Emergency overlays |
|---|---|---|
| ENT | Otitis, sinusitis, tonsillitis | Mastoiditis, quinsy, orbital cellulitis, airway threat |
| Eye | Cataract, glaucoma, conjunctivitis | Acute angle-closure glaucoma, severe keratitis, trauma |
| Dental | Caries, pulpitis, abscess | Spreading deep-neck infection, post-extraction bleed |
Otitis — External vs Media
Otitis externa ("swimmer's ear" language): pain on pinna/tragus movement, canal edema/discharge, often after water exposure or trauma to canal skin.
Acute otitis media (AOM): earache, fever, hearing dullness, bulging/erythematous tympanic membrane after upper respiratory infection — especially in children. Perforation may relieve pain with otorrhea.
Otitis media with effusion: fluid behind intact drum without acute infection signs; conductive hearing loss.
Chronic suppurative otitis media (CSOM): persistent otorrhea through a perforation; safe (tubotympanic) vs unsafe (atticoantral/cholesteatoma) language appears in older surgical texts — unsafe disease risks bone erosion and intracranial complications.
Mastoiditis complication cues: post-auricular swelling/erythema, protruding pinna, persistent fever after AOM. Intracranial extension (meningitis, brain abscess) is a red-flag stem requiring urgent referral language, not continued outpatient observation alone.
Sinusitis
Acute rhinosinusitis: facial pain/pressure over maxillary or frontal sinuses, nasal congestion, purulent discharge, fever, worse on bending forward. Often follows viral URI; bacterial superinfection suspected when severe or prolonged.
Chronic sinusitis: symptoms lasting beyond ~12 weeks with congestion, post-nasal drip, and reduced smell.
Complications to recognize: orbital cellulitis/abscess (lid swelling, proptosis, ophthalmoplegia, vision threat — especially from ethmoid disease in children), osteomyelitis, and rare intracranial spread. Unilateral foul discharge may hint at foreign body (child) or neoplasm/dental source (adult) — do not always call "simple sinusitis." Epistaxis that is recurrent, unilateral, and associated with obstruction needs neoplasm/workup thinking rather than allergy-only framing.
Tonsillitis & Peritonsillar Abscess
Acute tonsillitis: sore throat, odynophagia, fever, enlarged erythematous tonsils ± exudate, tender cervical nodes. Viral vs bacterial (streptococcal) hints: cough/coryza favor viral; high fever, tender nodes, no cough favor strep-pattern stems.
Quinsy (peritonsillar abscess): severe unilateral throat pain, trismus, hot-potato voice, uvular deviation away from the abscess, drooling. This is a surgical drainage emergency cue with airway vigilance — not routine outpatient tonsillitis.
Recurrent tonsillitis criteria and adenotonsillar hypertrophy with sleep-disordered breathing appear as indications-for-surgery language in some MCQs. Retropharyngeal abscess in young children (fever, drooling, neck stiffness, airway threat) is another deep-space infection trap.
Ophthalmology Essentials
Cataract
Cataract = opacity of the crystalline lens. Typical picture: gradual, painless diminution of vision, glare, faded colors, possible polyopia; no red painful eye in uncomplicated senile cataract. Congenital, traumatic, metabolic (diabetes), drug-induced (steroids), and senile categories may be mentioned.
Management framing for AIAPGET: diagnosis + indication for surgical extraction when vision/function impaired — you need not narrate IOL power calculations.
Glaucoma
Glaucoma is optic neuropathy often related to raised intraocular pressure (IOP), with characteristic visual-field and disc changes in chronic disease.
- Primary open-angle: insidious peripheral field loss, often asymptomatic until advanced; cupped disc language
- Acute angle-closure: sudden painful red eye, headache, nausea/vomiting, halos around lights, steamy cornea, mid-dilated fixed pupil, hard eye — ophthalmic emergency
Never treat acute angle-closure as "conjunctivitis" in a stem that includes halos, hard globe, and vomiting. Immediate ophthalmology referral and IOP-lowering pathway language outrank any supportive prescribing.
Conjunctivitis
| Type | Discharge / clues | Contagion / itch |
|---|---|---|
| Bacterial | Mucopurulent, lids stuck | Often contagious |
| Viral | Watery, often with URI/preauricular node | Highly contagious |
| Allergic | Watery/stringy, intense itching, bilateral | Seasonal/allergen history |
Red flags that are not simple conjunctivitis: severe pain, photophobia with corneal fluorescein uptake (keratitis), vision loss, hypopyon, trauma, or contact-lens keratitis risk.
Other high-yield eye mentions: stye (hordeolum), chalazion, corneal foreign body, blunt trauma / hyphema, chemical burns (irrigate first before detailed exam).
Dental Surgery Basics
Dental caries: demineralization of enamel/dentin from bacterial acid; pain on sweet/cold when dentin involved.
Pulpitis: inflammation of the pulp — reversible vs irreversible (severe spontaneous/lingering pain). Untreated progression → periapical abscess: localized swelling, tenderness to percussion, possible facial swelling and fever.
Ludwig's angina (spreading floor-of-mouth cellulitis) is a deep-space infection red flag with tongue elevation and airway risk after dental infection — urgent airway-aware referral, not analgesics alone.
Post-extraction care themes: bite on gauze, avoid vigorous rinsing/smoking early (dry socket risk), recognize secondary bleed. Alveolar osteitis (dry socket): severe pain days after extraction with exposed bone and foul odor — classic dental MCQ.
Basic anatomy cues sometimes tested: permanent dentition count (32), deciduous (20), trigeminal sensory supply to teeth (V2/V3).
Cross-Specialty Decision Rules
- Painful red eye + halos + hard globe → acute glaucoma, not conjunctivitis.
- Unilateral tonsillar swelling with trismus and uvular shift → quinsy.
- Post-AOM pinna protrusion + post-auricular erythema → mastoiditis.
- Gradual painless vision loss in elderly → cataract lane until proven otherwise.
- Dental pain with floor-of-mouth swelling and airway threat → urgent referral, not home care alone.
High-yield drill points
- Tragus tenderness → otitis externa cue
- Unsafe CSOM / cholesteatoma → complication risk
- Sinus disease with orbital signs → emergency imaging/referral mindset
- Angle-closure cues: pain, red eye, halos, mid-dilated pupil, nausea
- Dry socket timing: a few days after extraction, severe pain with exposed bone
A child recovers incompletely from acute otitis media and develops fever with post-auricular swelling and a protruding pinna. The most likely complication is:
Sudden painful red eye with headache, nausea, halos around lights, steamy cornea, and a mid-dilated pupil most strongly indicates:
Severe unilateral sore throat with trismus, hot-potato voice, and uvula pushed to the opposite side suggests:
Severe pain beginning a few days after dental extraction, with exposed bone and foul odor in the socket, is characteristic of: