Diseases of the Ear Practice Questions

Q: Areas of spontaneous healed perforation of the tympanic membrane are called as?

Perforations. **Explanation:** The correct answer is **Perforations** (specifically referred to as **monomeric membranes** or "false membranes"). **1. Why "Perforations" is correct:** When a tympanic membrane (TM) perforation heals spontaneously, it often lacks the middle fibrous layer (*lamina propria*), which is responsible for the drum's stiffness and resilience. The healed area consists only of the outer epithelial layer and the inner mucosal layer. Because this area is thin, transparent, and lacks structural support, it is clinically termed a **monomeric membrane**. To an untrained eye or under certain lighting, these areas look like persistent holes because they are so thin, but they are technically "healed perforations." In the context of this question, these thin, atrophic areas are classified under the pathology of healed perforations. **2. Why other options are incorrect:** * **Atelectasis:** This refers to the collapse or retraction of the tympanic membrane into the middle ear space due to prolonged negative middle ear pressure (Eustachian tube dysfunction). While a monomeric (healed) area is more prone to atelectasis because it is weak, the term "atelectasis" describes the *displacement* of the drum, not the healed area itself. * **Both/None:** Since "Perforations" (specifically healed/monomeric) is the standard clinical description for these thin areas, these options are incorrect. **Clinical Pearls for NEET-PG:** * **Monomeric Membrane:** A hallmark of a spontaneously healed TM. On otoscopy, it looks like a "hole" but moves with a Siegle’s bulb (unlike a true perforation). * **Layers of TM:** Normal TM has 3 layers; a healed perforation (monomeric) has only 2. * **Myringosclerosis:** If the healing process involves the deposition of hyaline and calcium in the fibrous layer, it appears as chalky white patches, often seen after chronic otitis media or ventilation tube insertion.

Q: Griesinger sign is otalgia along with pain and edema over mastoid. It is typically seen in?

Lateral sinus thrombosis. **Explanation:** **Griesinger’s Sign** is a classic clinical indicator of **Lateral (Sigmoid) Sinus Thrombosis (LST)**, a serious extracranial complication of chronic suppurative otitis media. 1. **Why Lateral Sinus Thrombosis is correct:** The sign refers to edema and tenderness over the posterior part of the mastoid process. It occurs due to **thrombosis of the mastoid emissary vein**, which normally drains into the sigmoid sinus. When the sigmoid sinus is obstructed by a thrombus, retrograde congestion leads to localized inflammation and swelling over the mastoid bone. 2. **Why other options are incorrect:** * **Acoustic Neuroma:** This is a benign tumor of the 8th cranial nerve. It typically presents with progressive sensorineural hearing loss, tinnitus, and equilibrium issues, not acute inflammatory signs like mastoid edema. * **Otosclerosis:** A metabolic bone disease of the otic capsule causing conductive hearing loss (stapedial fixation). It presents with a normal-looking tympanic membrane and no external swelling or pain. * **CSOM:** While LST is a *complication* of CSOM, CSOM itself refers to chronic ear discharge and perforation. Griesinger’s sign specifically indicates that the infection has progressed to involve the venous sinuses. **High-Yield Clinical Pearls for NEET-PG:** * **Delta Sign:** Seen on contrast-enhanced CT, representing a thrombus in the sigmoid sinus (empty triangle). * **Tobey-Ayer Test:** A clinical test where compression of the internal jugular vein on the diseased side fails to raise CSF pressure (measured via lumbar puncture). * **Crowe-Beck Test:** Engorgement of retinal veins upon compression of the jugular vein on the healthy side. * **Picket-fence Fever:** The characteristic hectic temperature spikes seen in LST due to septicemia.

Q: What is the commonest cause of acute otitis media in children?

Streptococcus pneumoniae. **Explanation:** **Streptococcus pneumoniae** is the most common bacterial pathogen responsible for Acute Otitis Media (AOM) across all age groups, particularly in children. It accounts for approximately 30–50% of bacterial isolates. The pathogenesis typically involves an antecedent viral upper respiratory tract infection that causes Eustachian tube dysfunction, allowing nasopharyngeal flora to migrate into the middle ear. **Analysis of Options:** * **A. Haemophilus influenzae:** This is the second most common cause (non-typeable strains). However, since the introduction of the pneumococcal conjugate vaccine (PCV), the relative prevalence of *H. influenzae* has increased, sometimes rivaling *S. pneumoniae* in specific populations, but *S. pneumoniae* remains the standard answer for exams. * **C. Staphylococcus aureus:** While it can cause middle ear infections, it is a much less common primary cause of acute AOM and is more frequently associated with chronic suppurative otitis media (CSOM) or postoperative infections. * **D. Pseudomonas:** This is the hallmark pathogen for **Otitis Externa** and **CSOM**, but it is rarely a cause of primary AOM in immunocompetent children. **High-Yield Clinical Pearls for NEET-PG:** * **Top 3 Pathogens in AOM:** 1. *S. pneumoniae*, 2. *H. influenzae*, 3. *Moraxella catarrhalis*. * **Viral Etiology:** Viruses (RSV, Rhinovirus) are often the initial triggers, but bacterial secondary infection is what defines clinical AOM. * **Drug of Choice:** Amoxicillin remains the first-line antibiotic. * **Complication:** The most common extracranial complication of AOM is **Acute Mastoiditis**.

Q: What is the cause of myringosclerosis?

Grommet insertion. **Explanation:** **Myringosclerosis** refers to the deposition of hyaline and calcium in the lamina propria of the tympanic membrane. It is a localized form of tympanosclerosis, often appearing as chalky white patches on the eardrum. **Why Grommet Insertion is the Correct Answer:** The most common cause of myringosclerosis is trauma to the tympanic membrane, specifically **Grommet (Ventilation Tube) insertion**. The procedure triggers an inflammatory response and oxidative stress within the fibrous layer of the drum. Studies show that up to 40–50% of children undergoing grommet insertion develop these white patches. Other causes include chronic otitis media and recurrent episodes of otitis media with effusion. **Analysis of Incorrect Options:** * **Genetic predisposition:** While some individuals may be more prone to scarring, there is no established genetic inheritance pattern for myringosclerosis. * **Otosclerosis:** This is a metabolic bone disease involving the otic capsule (specifically the stapes footplate), leading to conductive hearing loss. It does not involve the tympanic membrane. * **Idiopathic:** While some cases occur without a clear history, the vast majority are secondary to identifiable clinical triggers like trauma or infection. **High-Yield Clinical Pearls for NEET-PG:** * **Tympanosclerosis vs. Myringosclerosis:** If the calcification is limited to the drum, it is *myringosclerosis*. If it involves the ossicles or middle ear mucosa (leading to "frozen" ossicles), it is *tympanosclerosis*. * **Clinical Significance:** Myringosclerosis is usually asymptomatic and rarely causes significant hearing loss unless it is extensive. * **Horseshoe Appearance:** Extensive myringosclerosis can sometimes present as a "horseshoe" shaped white patch on the tympanic membrane. * **Chalky White Patch:** This is the classic otoscopic description used in exam questions.

Q: Skull base osteomyelitis is:

Malignant Otitis Externa. **Explanation:** **Malignant Otitis Externa (MOE)**, also known as Necrotizing Otitis Externa, is a severe, life-threatening infection of the external auditory canal that spreads to the **skull base**, leading to **Skull Base Osteomyelitis**. 1. **Why the correct answer is right:** MOE is primarily caused by *Pseudomonas aeruginosa* and typically affects elderly diabetic or immunocompromised patients. The infection originates in the external ear canal and spreads through the **Fissures of Santorini** and the tympanomastoid suture to the temporal bone and skull base. This results in osteomyelitis, which can lead to multiple cranial nerve palsies (CN VII is most common, followed by IX, X, and XI). 2. **Why the incorrect options are wrong:** * **Otomycosis:** A superficial fungal infection of the external ear canal (usually *Aspergillus niger* or *Candida*). It does not involve the bone. * **Tumor of the Ear:** While tumors like Squamous Cell Carcinoma can invade the skull base, the term "Skull Base Osteomyelitis" specifically refers to an inflammatory/infectious process, not a neoplastic one. * **Chronic Serous Otitis Media:** This involves non-purulent fluid in the middle ear due to Eustachian tube dysfunction. It is a non-infectious condition and does not cause bone destruction. **High-Yield Clinical Pearls for NEET-PG:** * **Pathognomonic Sign:** Presence of **granulation tissue** at the junction of the cartilaginous and bony external auditory canal. * **Diagnosis:** **Technetium-99m scan** is the most sensitive for initial diagnosis (detects osteoblastic activity). **Gallium-67 scan** is used to monitor response to treatment (detects active infection). * **Treatment:** Long-term intravenous anti-pseudomonal antibiotics (e.g., Ciprofloxacin, Ceftazidime) and strict glycemic control.

Q: Which of the following conditions is associated with congenital anomalies of the middle ear?

Down syndrome. **Explanation:** **Down Syndrome (Trisomy 21)** is frequently associated with a wide spectrum of ear anomalies. The most common middle ear findings include **ossicular malformations** (particularly involving the stapes and incus), narrow or stenotic middle ear clefts, and Eustachian tube dysfunction. These structural issues, combined with a high incidence of chronic serous otitis media, often lead to significant conductive hearing loss in these patients. **Analysis of Incorrect Options:** * **Turner Syndrome (45, XO):** While associated with otological issues, the most characteristic findings are **Sensory Neural Hearing Loss (SNHL)** and a high incidence of acute/chronic otitis media. Middle ear structural anomalies are less common than in Down syndrome. * **Klinefelter Syndrome (47, XXY):** This condition primarily affects the endocrine and reproductive systems. It is not classically associated with congenital middle ear anomalies. * **Alport Syndrome:** This is a genetic disorder of Type IV collagen. It typically presents with a triad of **progressive SNHL**, glomerulonephritis, and ocular defects (lenticonus). It does not involve structural malformations of the middle ear. **High-Yield Clinical Pearls for NEET-PG:** * **Down Syndrome Ear Triad:** Small pinna (low-set), narrow External Auditory Canal (EAC), and ossicular anomalies. * **Most common ossicular anomaly in Down syndrome:** Stapes suprastructure malformation. * **Goldenhar Syndrome & Treacher Collins:** These are other high-yield syndromes frequently associated with **Microtia** and **Atresia** of the middle ear. * **Mnemonic for Alport:** "Can't see (lenticonus), can't pee (nephritis), can't hear high-frequency (SNHL)."

Q: Which of the following is NOT true regarding Ramsay Hunt syndrome?

Facial vesicles are seen.. **Explanation:** Ramsay Hunt Syndrome (Herpes Zoster Oticus) is caused by the reactivation of the **Varicella Zoster Virus (VZV)** in the **geniculate ganglion** of the facial nerve. **Why Option C is the correct answer (The "False" statement):** While the syndrome involves a vesicular rash, the characteristic vesicles are typically found on the **pinna (auricle), the external auditory canal, and the soft palate/fauces**, rather than the general facial skin. In NEET-PG, examiners often differentiate between "facial vesicles" (suggestive of Herpes Zoster Ophthalmicus or general shingles) and the specific "otic" distribution of Ramsay Hunt. **Analysis of other options:** * **Option A & B:** The virus resides in the geniculate ganglion of **Cranial Nerve VII**. Reactivation leads to inflammation and compression of the nerve, resulting in lower motor neuron **facial nerve palsy**, which manifests as paralysis of the **facial muscles** on the affected side. * **Option D:** **Herpes Zoster** (reactivated VZV) is indeed the etiologic agent. **High-Yield Clinical Pearls for NEET-PG:** * **Triad:** Ipsilateral facial paralysis, otalgia (ear pain), and vesicles in the auditory canal/auricle. * **Nerve Involvement:** CN VII is most common, but CN VIII is frequently involved, leading to sensorineural hearing loss and vertigo. * **Prognosis:** The facial paralysis in Ramsay Hunt is generally more severe and has a poorer recovery rate compared to Bell’s Palsy. * **Treatment:** Combination of oral Acyclovir/Valacyclovir and systemic corticosteroids.

Q: Chalky white tympanic membrane is seen in:

Tympanosclerosis. **Explanation:** **Tympanosclerosis** is the correct answer because it is characterized by the hyalinization and subsequent calcification of the subepithelial connective tissue of the tympanic membrane (TM) and middle ear mucosa. Clinically, this manifests as dense, **chalky white patches** or plaques on the tympanic membrane, often described as "horseshoe-shaped" when they surround the handle of the malleus. It is typically a sequela of chronic inflammation or previous ventilation tube insertion. **Analysis of Incorrect Options:** * **ASOM (Acute Suppurative Otitis Media):** In the early stages, the TM appears **congested and red** (cartwheel appearance). In the suppurative stage, it may bulge and appear yellow or grey due to pus behind it, but not chalky white. * **Otosclerosis:** The tympanic membrane is usually **normal and mobile**. In about 10% of active cases, a reddish hue called **Schwartze sign** (Flamingo pink blush) may be seen over the promontory due to increased vascularity. * **Cholesteatoma:** This appears as a **pearly white, greasy mass** typically seen in the attic (pars flaccida) or posterosuperior quadrant of the TM, often associated with a retraction pocket or marginal perforation. It is a keratinizing squamous epithelium collection, not a calcification of the membrane itself. **High-Yield Clinical Pearls for NEET-PG:** * **Myringosclerosis:** When the calcification is limited strictly to the tympanic membrane (as seen in this question). * **Chalky white TM =** Tympanosclerosis. * **Flamingo pink TM =** Otosclerosis (Schwartze sign). * **Blue TM =** Hemotympanum or Glomus tumor. * **Dull/Amber TM =** Otitis Media with Effusion (Serous Otitis Media).

Q: What is the commonest intracranial complication of Chronic Suppurative Otitis Media (CSOM)?

Meningitis. **Explanation:** **1. Why Meningitis is Correct:** In the context of Chronic Suppurative Otitis Media (CSOM), **Meningitis** is statistically the **most common intracranial complication**. It typically occurs due to the direct spread of infection through pre-formed pathways (like the labyrinth or internal auditory canal) or via retrograde thrombophlebitis of the small veins. Clinically, it presents with the classic triad of fever, headache, and neck rigidity (nuchal rigidity). **2. Why Other Options are Incorrect:** * **Sub-periosteal abscess & Mastoiditis (Options A & B):** These are **extracranial** (intratemporal) complications. While common, the question specifically asks for the commonest *intracranial* complication. Mastoiditis is often the precursor to other complications but is not classified as intracranial. * **Brain abscess (Option C):** This is the **second most common** intracranial complication of CSOM. While it is a significant cause of mortality, it is less frequent than meningitis. Note that the most common site for an otogenic brain abscess is the **Temporal lobe**, followed by the Cerebellum. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common Intracranial complication:** Meningitis. * **Most common Extracranial complication:** Mastoiditis. * **Most common site for Otogenic Brain Abscess:** Temporal lobe (due to spread through the tegmen tympani). * **Sigmoid Sinus Thrombosis:** Look for "Griesinger's sign" (edema over the mastoid) and "Picket-fence fever." * **Gradenigo’s Syndrome:** A complication involving apical petrositis, characterized by the triad of Otorrhea, Retro-orbital pain (V nerve), and Diplopia (VI nerve palsy).

Q: Regarding Necrotizing otitis externa, all are true except?

Surgery is never done. **Necrotizing Otitis Externa (Malignant Otitis Externa)** is a severe, life-threatening infection of the external auditory canal that spreads to the skull base (osteomyelitis). ### Explanation of Options: * **B. Surgery is never done (Correct Answer):** This statement is **false**, making it the correct choice. While the primary treatment is medical (long-term intravenous antibiotics), surgery is **not** "never" done. Surgery is indicated for the debridement of necrotic tissue, drainage of abscesses, or when medical therapy fails. However, extensive radical surgery (like total temporal bone resection) is generally avoided as it may spread the infection across tissue planes. * **A. Caused by Pseudomonas:** This is **true**. *Pseudomonas aeruginosa* is the causative organism in over 95% of cases. * **C. Facial nerve involved:** This is **true**. As the infection spreads to the skull base (stylomastoid foramen), the facial nerve is the most common cranial nerve affected. Involvement of CN IX, X, XI, and XII indicates further progression (Jugular foramen syndrome). * **D. Common in diabetics:** This is **true**. The disease characteristically affects elderly patients with uncontrolled diabetes mellitus or immunocompromised states. ### Clinical Pearls for NEET-PG: * **Pathognomonic Sign:** Presence of **granulation tissue** at the bony-cartilaginous junction of the external auditory canal. * **Diagnosis:** * **Technetium-99m scan:** Most sensitive for initial diagnosis (detects osteoblastic activity). * **Gallium-67 scan:** Best for **monitoring treatment response** (returns to normal once infection resolves). * **HRCT Temporal Bone:** Best for assessing the extent of bony erosion. * **Treatment of Choice:** Intravenous Ciprofloxacin or third-generation Cephalosporins (Ceftazidime) for 6–8 weeks. Control of blood sugar is mandatory.

Question 1

Areas of spontaneous healed perforation of the tympanic membrane are called as?

Accepted Answer

Perforations

Answer

Atelectasis

Answer

Both of the above

Answer

None of the above

Question 2

Griesinger sign is otalgia along with pain and edema over mastoid. It is typically seen in?

Accepted Answer

Lateral sinus thrombosis

Answer

Acoustic neuroma

Answer

Otosclerosis

Answer

Chronic suppurative otitis media (CSOM)

Question 3

What is the commonest cause of acute otitis media in children?

Accepted Answer

Streptococcus pneumoniae

Answer

Haemophilus influenzae

Answer

Staphylococcus aureus

Answer

Pseudomonas

Question 4

What is the cause of myringosclerosis?

Accepted Answer

Grommet insertion

Answer

Genetic predisposition

Answer

Otosclerosis

Answer

Idiopathic

Question 5

Skull base osteomyelitis is:

Accepted Answer

Malignant Otitis Externa

Answer

Otomycosis

Answer

Tumor of the Ear

Answer

Chronic serous Otitis Media

Question 6

Which of the following conditions is associated with congenital anomalies of the middle ear?

Accepted Answer

Down syndrome

Answer

Turner syndrome

Answer

Klinefelter syndrome

Answer

Alport syndrome

Question 7

Which of the following is NOT true regarding Ramsay Hunt syndrome?

Accepted Answer

Facial vesicles are seen.

Answer

Cranial nerve VII is involved.

Answer

Facial muscles are involved.

Answer

Herpes zoster is the etiologic agent.

Question 8

Chalky white tympanic membrane is seen in:

Accepted Answer

Tympanosclerosis

Answer

Acute suppurative otitis media (ASOM)

Answer

Otosclerosis

Answer

Cholesteatoma

Question 9

What is the commonest intracranial complication of Chronic Suppurative Otitis Media (CSOM)?

Accepted Answer

Meningitis

Answer

Sub-periosteal abscess

Answer

Mastoiditis

Answer

Brain abscess

Question 10

Regarding Necrotizing otitis externa, all are true except?

Accepted Answer

Surgery is never done

Answer

Caused by Pseudomonas

Answer

Facial nerve involved

Answer

Common in diabetics

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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