Diseases of the Ear Practice Questions

Q: A 45-year-old man presents with a 6-month history of foul-smelling unilateral ear discharge and progressive right-sided hearing loss. He denies pain or vertigo. On examination, the ear canal contains scanty whitish debris. His otoscopic image is shown (Image 2). Which of the following complications is most classically associated with this attic cholesteatoma?

A. Lateral semicircular canal fistula with perilymph leak. ***A. Lateral semicircular canal fistula with perilymph leak*** - Attic cholesteatoma expands by eroding the **scutum** and the **aditus ad antrum**, making the **lateral semicircular canal** the most common site for a labyrinthine fistula. - Persistent erosion can lead to a **perilymph leak**, presenting clinically as episodic **vertigo** or sensorineural hearing loss when pressure is applied to the ear canal. *B. Perforation of the pars tensa with central conductive hearing loss* - This finding is characteristic of **tubotympanic type** (safe) chronic suppurative otitis media, rather than atttic cholesteatoma. - Cholesteatoma typically involves the **pars flaccida** (attic) or the posterior-superior quadrant, rather than causing a simple **central perforation**. *C. Eustachian tube dysfunction causing retraction of the posterior superior quadrant* - While **Eustachian tube dysfunction** is an underlying pathophysiological mechanism for forming a **retraction pocket**, it is considered a precursor rather than a complication of an established cholesteatoma. - The case describes a patient who already has **active disease** with debris, moving beyond the stage of simple retraction. *D. Otitis media with effusion causing a type B tympanogram* - **Otitis media with effusion** is characterized by fluid behind an intact tympanic membrane, typically presenting with a **Type B (flat) tympanogram** and no foul-smelling discharge. - A **type B tympanogram** in the presence of a cholesteatoma suggests middle ear congestion, but it does not represent the severe **erosive complications** associated with attic disease.

Q: Which of the following is a true differential cause of referred otalgia?

All of the above. **Explanation:** Referred otalgia occurs when pain is felt in the ear due to a shared nerve supply with a distant site of pathology. The ear receives sensory innervation from several cranial nerves (V, VII, IX, and X) and cervical nerves (C2, C3). Therefore, any lesion in the regions supplied by these nerves can present as ear pain. * **Carcinoma of the Larynx (Option A):** The larynx is supplied by the **Vagus nerve (CN X)** via the superior and recurrent laryngeal nerves. The ear is also supplied by the Vagus nerve via **Arnold’s nerve** (auricular branch). Malignancies of the supraglottis or hypopharynx frequently refer pain to the ear. * **Carcinoma of the Oral Cavity (Option B):** The anterior two-thirds of the tongue and the floor of the mouth are supplied by the **Mandibular nerve (V3)**. This shares a pathway with the **Auriculotemporal nerve**, which supplies the external auditory canal and TMJ. * **Carcinoma of the Tongue (Option C):** The posterior one-third of the tongue and the oropharynx are supplied by the **Glossopharyngeal nerve (CN IX)**. This nerve also provides sensation to the middle ear via **Jacobson’s nerve** (tympanic branch). This is a classic cause of referred otalgia in cases of tonsillitis or base-of-tongue tumors. **Clinical Pearls for NEET-PG:** * **The "Rule of 5":** Remember the nerves involved: CN V, VII, IX, X, and Cervical plexus (C2, C3). * **Trotter’s Triad:** Nasopharyngeal carcinoma can present with conductive hearing loss, palatal palsy, and referred otalgia (due to CN V involvement). * **High-Yield Fact:** In an elderly patient with a normal-looking ear exam complaining of otalgia, always perform a thorough fiberoptic laryngoscopy (FOL) to rule out an occult malignancy of the upper aerodigestive tract.

Q: Bleeding ear discharge is mostly due to which of the following conditions?

Glomus tumour. **Explanation:** **Glomus Tumour (Correct Answer):** Glomus tumours (Paragangliomas) are highly vascular, benign but locally invasive neoplasms arising from the glomus bodies in the middle ear (Glomus Tympanicum) or jugular bulb (Glomus Jugulare). Because these tumours are composed of a dense network of blood vessels, they are prone to spontaneous bleeding. **Bleeding ear discharge (otorrhagia)** is a classic presentation, often occurring after minor trauma or spontaneously as the tumour erodes the tympanic membrane. **Why the other options are incorrect:** * **Otosclerosis:** This is a metabolic bone disease of the otic capsule causing stapes fixation. It presents with progressive **painless conductive hearing loss** and a normal-looking tympanic membrane (except for the occasional Flamingo flush/Schwartz sign). There is no discharge or bleeding. * **Otitis Media with Effusion (OME):** This involves the accumulation of non-purulent fluid in the middle ear. It presents with hearing loss and a **retracted/dull tympanic membrane**. Discharge only occurs if the membrane ruptures, and even then, it is serous or mucoid, not primarily bloody. * **Acoustic Neuroma:** This is a benign tumour of the 8th cranial nerve (vestibular schwannoma). It is located in the internal auditory canal or cerebellopontine angle. It presents with **unilateral sensorineural hearing loss and tinnitus**, but never with ear discharge or bleeding as it is not located in the middle ear. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Tinnitus:** The most common early symptom of Glomus tumour ("hearing one's own heartbeat"). * **Brown’s Sign:** Pulsations seen on the tympanic membrane that blanch with positive pressure using a Siegle’s speculum (Pathognomonic for Glomus). * **Aquino’s Sign:** Blanching of the tympanic mass upon carotid artery compression. * **Rising Sun Appearance:** A red/blue fleshy mass seen behind an intact tympanic membrane.

Q: Which ossicle is most commonly involved in chronic suppurative otitis media (CSOM)?

Incus. **Explanation:** In Chronic Suppurative Otitis Media (CSOM), particularly the atticoantral type, the ossicular chain is frequently damaged due to bone-eroding mediators and pressure necrosis. **Why the Incus is the Correct Answer:** The **Incus** is the most commonly involved ossicle in CSOM. Specifically, the **long process of the incus** is the most vulnerable site. This susceptibility is due to its precarious blood supply (terminal branches of the anterior tympanic and deep auricular arteries) and its anatomical position, which makes it prone to ischemia when there is persistent inflammation or pressure from a cholesteatoma. **Analysis of Incorrect Options:** * **Malleus:** While the malleus is frequently involved, it is more resistant than the incus because it is firmly embedded within the layers of the tympanic membrane, providing it with a more robust collateral blood supply. The handle of the malleus is the second most common site of necrosis. * **Stapes:** The stapes is generally the most resistant ossicle. However, when it is involved, the suprastructure (crura) is usually destroyed first, while the footplate often remains intact, acting as a barrier to the inner ear. * **All the above:** While all ossicles *can* be affected, the question asks for the *most common*, making this option incorrect. **High-Yield Clinical Pearls for NEET-PG:** * **Most common ossicle affected:** Incus (Long process). * **Second most common ossicle affected:** Malleus (Handle). * **Most resistant ossicle:** Stapes (specifically the footplate). * **Mechanism of destruction:** Primarily due to osteoclast activation and collagenases triggered by chronic inflammation or cholesteatoma. * **Reconstruction:** If the incus is missing but the stapes is intact, a **Type II Tympanoplasty** (ossicular reconstruction) is often performed.

Q: Acute suppurative otitis media (ASOM) is treated using which of the following antimicrobial classes, except?

Streptomycin. **Explanation:** The primary goal in treating **Acute Suppurative Otitis Media (ASOM)** is to cover the most common causative organisms: *Streptococcus pneumoniae*, *Haemophilus influenzae*, and *Moraxella catarrhalis*. **Why Streptomycin is the Correct Answer:** Streptomycin is an **Aminoglycoside**. While effective against certain gram-negative bacteria, it is **not used** for ASOM for two critical reasons: 1. **Ototoxicity:** Streptomycin is highly vestibulotoxic and cochleotoxic. Using it to treat an ear infection poses a significant risk of permanent sensorineural hearing loss and equilibrium disruption. 2. **Spectrum:** It has poor activity against the typical respiratory pathogens that cause ASOM. **Analysis of Incorrect Options:** * **Penicillins (e.g., Amoxicillin):** This is the **drug of choice** for ASOM. Amoxicillin (often with Clavulanic acid) effectively targets *S. pneumoniae*. * **Cephalosporins (e.g., Cefuroxime, Ceftriaxone):** These are excellent second-line agents, especially in cases of penicillin resistance or treatment failure. * **Erythromycin (Macrolides):** Macrolides (including Azithromycin/Clarithromycin) are the preferred alternatives for patients with **penicillin allergies**. **NEET-PG High-Yield Pearls:** * **Drug of Choice (DOC):** Amoxicillin remains the first-line treatment for ASOM. * **Most Common Organism:** *Streptococcus pneumoniae* is the most frequent cause of ASOM across all age groups. * **Aminoglycoside Caution:** Never use aminoglycoside ear drops if a tympanic membrane perforation is suspected (due to risk of ototoxicity), and they are never the systemic choice for uncomplicated ASOM. * **Myringotomy Indication:** If the tympanic membrane is bulging and the patient has severe pain or high fever, a myringotomy (curvilinear incision in the posteroinferior quadrant) may be required.

Q: A 57-year-old patient has been diagnosed with a posterior superior retraction pocket cholesteatoma. All would constitute part of the management, except?

Myringoplasty. **Explanation:** The patient has a **posterior superior retraction pocket cholesteatoma**, which is a form of **Attico-antral (Unsafe) Chronic Suppurative Otitis Media (CSOM)**. This condition involves bone erosion and the presence of keratinizing squamous epithelium in the middle ear cleft, posing a risk of intracranial complications. **Why Myringoplasty is the correct answer (the "Except"):** Myringoplasty is defined as the surgical repair of a perforation in the tympanic membrane (pars tensa) without any middle ear exploration. It is indicated for **Tubotympanic (Safe) CSOM**. In the case of a retraction pocket cholesteatoma, the disease is not a simple perforation; it involves an invagination of the drum that often extends into the attic or mastoid. Simple closure of the drum (myringoplasty) would "trap" the cholesteatoma inside, leading to worsening bone destruction. **Analysis of other options:** * **Audiometry:** Essential pre-operative step to assess the degree of conductive hearing loss and check the cochlear reserve (bone conduction) before surgery. * **Mastoid Exploration (Canal Wall Down/Up Mastoidectomy):** The primary treatment for cholesteatoma is the surgical removal of the disease from the attic, antrum, and mastoid air cells to create a "safe" ear. * **Tympanoplasty:** This involves the eradication of disease from the middle ear cavity combined with the reconstruction of the hearing mechanism (ossiculoplasty and/or grafting). It is a standard part of the definitive management of unsafe CSOM. **Clinical Pearls for NEET-PG:** * **Cholesteatoma Theory:** The "Invagination Theory" (Wittmaack’s) explains posterior superior retraction pockets due to negative middle ear pressure. * **Surgery Goal:** The priority in cholesteatoma surgery is **Safety first**, followed by a dry ear, and lastly, hearing preservation. * **Prussak’s Space:** The most common site for the origin of a primary acquired cholesteatoma.

Q: Which statement is true about safe Chronic Suppurative Otitis Media (CSOM)?

The etiology involves multiple bacteria.. **Explanation:** **1. Why Option A is Correct:** Safe (Mucosal) Chronic Suppurative Otitis Media (CSOM) is characterized by a permanent perforation of the pars tensa. The microbiology of CSOM is typically **polymicrobial**, involving both aerobic and anaerobic bacteria. The most common aerobic isolates are *Pseudomonas aeruginosa* and *Staphylococcus aureus*, while anaerobes like *Bacteroides* and *Fusobacterium* are often present. This mixed flora is a hallmark of the disease and dictates the choice of broad-spectrum antimicrobial therapy. **2. Why the Other Options are Incorrect:** * **Option B:** Oral antibiotics (such as Ciprofloxacin) are effective, especially during acute exacerbations, although topical therapy is often preferred as the first line. * **Option C:** Topical ear drops (containing aminoglycosides or quinolones) are the **mainstay of treatment** for a discharging ear in safe CSOM. They provide a higher concentration of the drug directly to the middle ear mucosa compared to systemic routes. * **Option D:** Otic hydrocephalus is a rare intracranial complication of **Unsafe (Atticoantral) CSOM**, which is associated with cholesteatoma and bone erosion. Safe CSOM rarely leads to such life-threatening complications. **Clinical Pearls for NEET-PG:** * **Cardinal Sign:** Central perforation with a profuse, mucoid, non-foul-smelling discharge. * **Hearing Loss:** Usually conductive; the degree depends on the size and site of the perforation and ossicular integrity. * **Drug of Choice:** Quinolone ear drops (e.g., Ciprofloxacin) are preferred due to their activity against *Pseudomonas* and lack of ototoxicity. * **Definitive Surgery:** Myringoplasty or Tympanoplasty (to close the perforation and restore hearing).

Q: What is the most common cause of sensorineural hearing loss in adults?

Presbycusis. **Explanation:** **Presbycusis** (Age-related sensorineural hearing loss) is the correct answer because it is the most common cause of sensorineural hearing loss (SNHL) in the adult population worldwide. It is a progressive, bilateral, symmetrical high-frequency SNHL resulting from degenerative changes in the inner ear (specifically the hair cells of the Organ of Corti and the stria vascularis) as a person ages. **Analysis of Incorrect Options:** * **Meniere’s Disease:** While a significant cause of SNHL, it is characterized by a classic triad of episodic vertigo, tinnitus, and fluctuating low-frequency hearing loss. It is far less prevalent than age-related degeneration. * **Otosclerosis:** This condition typically causes **conductive hearing loss** due to stapes fixation. While "Sensory Otosclerosis" can occur, it is not the primary presentation nor the most common cause of SNHL in adults. * **Osteenic Osteoarthritis:** This is not a standard clinical term associated with hearing loss. It likely serves as a distractor related to general degenerative bone diseases which do not typically cause SNHL. **High-Yield Clinical Pearls for NEET-PG:** * **Schuknecht’s Classification:** Presbycusis is divided into four types: Sensory (loss of hair cells), Neural (loss of spiral ganglion cells), Metabolic/Strial (atrophy of stria vascularis—shows a flat audiogram), and Cochlear Conductive (stiffening of the basilar membrane). * **Audiometry Finding:** Typically shows a **sloping, symmetrical high-frequency SNHL**. * **Roll-over Phenomenon:** Patients often have a disproportionately low Speech Discrimination Score (SDS) compared to their Pure Tone Average (PTA), especially in noisy environments. * **Management:** The primary treatment is the use of bilateral **hearing aids** or, in severe cases, cochlear implants.

Q: What is the treatment of choice in a postauricular abscess as a complication of otitis media?

Incision and drainage, antibiotics, and mastoidectomy. ### Explanation **Why Option D is Correct:** A postauricular abscess is a classic complication of **Acute Coalescent Mastoiditis**. In this condition, the bony septa of the mastoid air cells break down, leading to pus accumulation that eventually breaches the mastoid cortex (usually at Macewen’s triangle). The treatment must address three levels: 1. **Incision and Drainage (I&D):** To evacuate the subperiosteal pus and provide immediate symptomatic relief. 2. **Antibiotics:** To control the systemic infection and prevent further intracranial complications. 3. **Cortical Mastoidectomy (Schwartze procedure):** This is the **definitive step**. Since the underlying cause is "coalescent mastoiditis," the mastoid acts as a reservoir of infection. Without exenterating the diseased air cells and providing drainage for the middle ear cleft, the abscess is highly likely to recur. **Why Other Options are Incorrect:** * **Options A & B:** These address the superficial abscess but fail to treat the **source** of the infection (the mastoid reservoir). Relying only on I&D and antibiotics leads to high recurrence rates and risks progression to intracranial complications like meningitis or lateral sinus thrombosis. * **Option C:** Aspiration is insufficient for a thick, organized postauricular abscess and does not address the underlying bony destruction. **Clinical Pearls for NEET-PG:** * **Clinical Sign:** The pinna is typically displaced **downwards and forwards**. * **Radiology:** X-ray mastoid (Schuller’s view) or CT shows **"clouding"** of air cells and loss of distinct bony trabeculae (coalescence). * **Luc’s Abscess:** A similar presentation where pus tracks under the temporal muscle rather than the postauricular skin. * **Citelli’s Abscess:** Pus tracking into the digastric fossa. * **Bezold’s Abscess:** Pus tracking down into the sternocleidomastoid muscle sheath.

Q: Which agent is used to kill an insect in the ear?

Oil. **Explanation:** The management of a live insect in the external auditory canal requires immediate immobilization and killing of the insect before attempting removal. This prevents the insect from moving further inward, which can cause intense pain, noise, and potential trauma to the tympanic membrane. **1. Why Oil is the Correct Answer:** Instilling a few drops of **oil** (such as liquid paraffin, olive oil, or coconut oil) is the treatment of choice. Oil acts by **suffocating** the insect by blocking its respiratory spiracles. Once the insect is dead, it stops struggling, providing immediate symptomatic relief and allowing for safe removal via syringing or forceps. **2. Why the Other Options are Incorrect:** * **Hydrogen Peroxide:** While it has antiseptic properties and can help soften wax, the "bubbling" action (release of oxygen) can agitate a live insect, causing it to claw or bite the canal wall, leading to severe pain or injury. * **Water:** Insects can often survive in water for a period. Furthermore, if the insect is a vegetable foreign body (like a seed) or if the insect swells, it becomes harder to remove. * **Petrol:** This is highly irritant to the delicate skin of the external auditory canal and the tympanic membrane. It is chemically toxic and not recommended for clinical use. **Clinical Pearls for NEET-PG:** * **First Step:** Always kill the insect before removal. * **Alternative Agents:** If oil is unavailable, **2% Lignocaine** can be used; it both kills the insect and provides local anesthesia. * **Avoid:** Never use forceps to grab a *live* insect, as it will crawl deeper. * **Post-Removal:** Always inspect the canal for any remaining parts (legs/wings) and check the tympanic membrane for perforations.

Question 1

A 45-year-old man presents with a 6-month history of foul-smelling unilateral ear discharge and progressive right-sided hearing loss. He denies pain or vertigo. On examination, the ear canal contains scanty whitish debris. His otoscopic image is shown (Image 2). Which of the following complications is most classically associated with this attic cholesteatoma?

Accepted Answer

A. Lateral semicircular canal fistula with perilymph leak

Answer

B. Perforation of the pars tensa with central conductive hearing loss

Answer

C. Eustachian tube dysfunction causing retraction of the posterior superior quadrant

Answer

D. Otitis media with effusion causing a type B tympanogram

Question 2

Which of the following is a true differential cause of referred otalgia?

Accepted Answer

All of the above

Answer

Carcinoma of the larynx

Answer

Carcinoma of the oral cavity

Answer

Carcinoma of the tongue

Question 3

Bleeding ear discharge is mostly due to which of the following conditions?

Accepted Answer

Glomus tumour

Answer

Otosclerosis

Answer

Otitis media with effusion

Answer

Acoustic neuroma

Question 4

Which ossicle is most commonly involved in chronic suppurative otitis media (CSOM)?

Accepted Answer

Incus

Answer

Malleus

Answer

Stapes

Answer

All the above

Question 5

Acute suppurative otitis media (ASOM) is treated using which of the following antimicrobial classes, except?

Accepted Answer

Streptomycin

Answer

Erythromycin

Answer

Penicillin

Answer

Cephalosporin

Question 6

A 57-year-old patient has been diagnosed with a posterior superior retraction pocket cholesteatoma. All would constitute part of the management, except?

Accepted Answer

Myringoplasty

Answer

Audiometry

Answer

Mastoid exploration

Answer

Tympanoplasty

Question 7

Which statement is true about safe Chronic Suppurative Otitis Media (CSOM)?

Accepted Answer

The etiology involves multiple bacteria.

Answer

Oral antibiotics are generally ineffective.

Answer

Ear drops play no role in treatment.

Answer

Otic hydrocephalus is a known complication.

Question 8

What is the most common cause of sensorineural hearing loss in adults?

Accepted Answer

Presbycusis

Answer

Meniere's disease

Answer

Otosclerosis

Answer

Osteenic osteoarthritis

Question 9

What is the treatment of choice in a postauricular abscess as a complication of otitis media?

Accepted Answer

Incision and drainage, antibiotics, and mastoidectomy

Answer

Incision and drainage

Answer

Incision and drainage plus antibiotics

Answer

Aspiration and antibiotics

Question 10

Which agent is used to kill an insect in the ear?

Accepted Answer

Oil

Answer

Hydrogen peroxide

Answer

Water

Answer

Petrol

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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