Diseases of the Ear Practice Questions

Q: Surfer's ear differs from osteoma in that it is:

Sessile. ### Explanation The question asks to differentiate **Exostoses (Surfer’s Ear)** from **Osteomas** of the external auditory canal. The correct answer is **Sessile**. #### 1. Why "Sessile" is Correct **Exostoses (Surfer’s Ear)** are benign bony overgrowths of the external auditory canal caused by chronic exposure to cold water or wind. Pathologically, they are characterized by broad-based, **sessile** elevations of lamellar bone. In contrast, an **Osteoma** is a true benign neoplasm that typically presents as a **pedunculated** (stalked) mass. #### 2. Analysis of Incorrect Options * **A & B (Unilateral/Single):** These are features of **Osteomas**. Osteomas are typically solitary and unilateral. Exostoses (Surfer’s Ear) are almost always **bilateral and multiple**, appearing as 3 to 4 smooth mounds in the deep canal. * **D (Seen in cartilaginous canal):** Both exostoses and osteomas occur in the **bony part** of the external auditory canal, not the cartilaginous part. Exostoses specifically arise from the periosteum of the tympanic bone. #### 3. Clinical Pearls for NEET-PG | Feature | Exostoses (Surfer's Ear) | Osteoma | | :--- | :--- | :--- | | **Etiology** | Reactive (Cold water/wind) | Neoplastic (Spontaneous) | | **Number** | Multiple | Solitary | | **Laterality** | Bilateral | Unilateral | | **Shape** | Sessile (Broad-based) | Pedunculated (Stalked) | | **Location** | Deep bony canal | Bony-cartilaginous junction | * **High-Yield Fact:** Exostoses are often asymptomatic but can lead to conductive hearing loss or otitis externa if they obstruct the canal or trap debris (the "wax trap" effect). Surgery (canalplasty) is indicated only if symptomatic.

Q: What is true about Bell's palsy?

There is no role for steroids in its management.. **Explanation:** **Bell’s Palsy** is an acute, lower motor neuron (LMN) facial nerve paralysis of unknown etiology, though it is strongly linked to the reactivation of the Herpes Simplex Virus (HSV) in the geniculate ganglion. **Why the options are evaluated:** * **Option D (Correct Answer):** This option is technically **incorrect** in clinical practice, as **Corticosteroids (Prednisolone)** are the **gold standard** and mainstay of treatment. They reduce nerve edema and improve recovery rates if started within 72 hours. *Note: In the context of this specific MCQ, if "D" is marked as the correct statement by the examiner, it likely represents a factual error in the question key or a "least likely" scenario, as steroids are definitively indicated.* * **Option A:** This is a **true** statement. Bell’s palsy is the most common cause of unilateral facial paralysis worldwide (diagnosis of exclusion). * **Option B:** While mild ear pain is common, significant **tinnitus and vertigo** are characteristic of **Ramsay Hunt Syndrome** (Herpes Zoster Oticus), not typical Bell’s palsy. * **Option C:** Crocodile tears (bogorad syndrome) and synkinesis are complications of **faulty regeneration** of the nerve *after* the acute phase; they are not presenting features of the palsy itself. **Clinical Pearls for NEET-PG:** 1. **House-Brackmann Scale:** Used to grade the severity of facial nerve palsy (Grade I is normal, Grade VI is total paralysis). 2. **Schirmer’s Test:** Used to localise the lesion (at or proximal to the geniculate ganglion if lacrimation is reduced). 3. **Prognosis:** 85% of patients show signs of recovery within 3 weeks. 4. **Bell’s Phenomenon:** Upward and outward rolling of the eyeball when the patient attempts to close the eyelid (a normal protective reflex made visible by the paralysis).

Q: Exostosis due to repetitive exposure to cold water is common in which part of the temporal bone?

Tympanic part. **Explanation:** **Exostosis**, commonly known as **"Surfer’s Ear,"** refers to the formation of benign, broad-based bony outgrowths within the External Auditory Canal (EAC). This condition is a reactive response to chronic irritation, most frequently caused by repetitive exposure to cold water and wind. **Why the Tympanic Part is Correct:** The External Auditory Canal consists of an outer cartilaginous portion and an inner bony portion. The bony portion is primarily formed by the **tympanic part of the temporal bone**. When cold water enters the ear, it triggers osteoblastic activity in the periosteum of the bony canal. Because the tympanic bone forms the floor, anterior wall, and posterior-inferior wall of the bony EAC, this is where exostoses predominantly develop. They are typically bilateral, multiple, and sessile. **Why Other Options are Incorrect:** * **Squamous part:** Forms the roof (superior wall) of the bony EAC and the lateral wall of the middle ear (scutum), but it is not the primary site for cold-water-induced reactive bone growth. * **Petrous part:** This is the densest part of the temporal bone housing the inner ear structures (cochlea and vestibule). It does not form the walls of the external canal. * **Mastoid part:** While it contains the mastoid air cells and forms the posterior boundary of the bony canal, the reactive exostoses specifically arise from the tympanic ring/bone. **High-Yield Clinical Pearls for NEET-PG:** * **Exostosis vs. Osteoma:** Exostoses are usually **multiple and bilateral** (associated with cold water), whereas an Osteoma is typically **solitary, unilateral**, and arises from the tympanosquamous suture. * **Clinical Presentation:** Often asymptomatic but can lead to conductive hearing loss if they cause canal stenosis or trap cerumen/debris (leading to Otitis Externa). * **Management:** Conservative (earplugs) or surgical removal (canalplasty) if symptomatic.

Q: Otosclerosis characteristically presents with which type of hearing loss?

Conductive hearing loss. **Explanation:** **Otosclerosis** is a primary metabolic bone disease of the otic capsule characterized by the replacement of normal bone with vascular spongy bone. The most common site of involvement is the **fissula ante fenestram** (just anterior to the oval window). 1. **Why Conductive Hearing Loss (CHL) is correct:** The hallmark of clinical otosclerosis is **stapedial fixation**. As the otosclerotic focus involves the annular ligament, the stapes footplate becomes fixed, preventing the efficient transmission of sound vibrations from the ossicular chain to the cochlea. This mechanical blockage results in a classic **Conductive Hearing Loss**. 2. **Why other options are incorrect:** * **Sensorineural Hearing Loss (SNHL):** While "Cochlear Otosclerosis" can cause SNHL due to the release of cytotoxic enzymes into the inner ear, it is less common than the stapedial (conductive) variety. * **Mixed Hearing Loss:** This occurs in advanced stages when both stapedial fixation and cochlear involvement coexist, but it is not the *characteristic* initial presentation. * **Fluctuating Hearing Loss:** This is a hallmark of **Meniere’s disease**, not otosclerosis, which typically presents with progressive loss. **High-Yield Clinical Pearls for NEET-PG:** * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz** (mechanical artifact, disappears after stapedectomy). * **Schwartz Sign:** A flamingo-pink flush seen through the TM, indicating active otosclerosis (Otospongiosis). * **Gelle’s Test:** Negative (indicates fixed ossicles). * **Tympanometry:** Typically shows an **As type** curve (stiffened system). * **Treatment of Choice:** Stapedotomy (using a Teflon piston). Medical management involves **Sodium Fluoride** to arrest disease progression.

Q: Selective low frequency sensorineural hearing loss occurs in which condition?

Meniere's disease. **Explanation:** **Meniere’s Disease (Endolymphatic Hydrops)** is characterized by an accumulation of endolymph within the inner ear. In the early stages, the increased pressure primarily affects the **apex of the cochlea**, where the basilar membrane is wider and more compliant. Since the apex is responsible for detecting low-frequency sounds, patients typically present with a **fluctuating, low-frequency sensorineural hearing loss (SNHL)**. This is a classic "rising" configuration on an audiogram. **Analysis of Incorrect Options:** * **BPPV:** This is a peripheral vestibular disorder caused by canalolithiasis (usually in the posterior semicircular canal). It causes episodic vertigo triggered by head movements but **does not involve hearing loss**. * **Glomus Tumour:** These are vascular tumors of the middle ear. They typically present with **pulsatile tinnitus** and **conductive hearing loss** (due to mass effect on the ossicles), rather than selective low-frequency SNHL. * **Schwannoma (Acoustic Neuroma):** This tumor of the 8th cranial nerve typically presents with **unilateral, high-frequency SNHL** and poor speech discrimination, as the tumor compresses the vestibular and cochlear nerve fibers. **High-Yield Clinical Pearls for NEET-PG:** * **Meniere’s Tetrad:** Episodic vertigo, fluctuating SNHL, tinnitus, and a sensation of aural fullness. * **Lermoyez Phenomenon:** A variant of Meniere’s where hearing *improves* during a vertigo attack. * **Burn-out Stage:** In late-stage Meniere’s, the hearing loss may become permanent and involve all frequencies (flat audiogram). * **Glycerol Test:** Used for diagnosis; it acts as an osmotic diuretic to temporarily reduce endolymphatic pressure and improve hearing.

Q: What is true about cholesteatoma?

It erodes the bone.. **Explanation:** **Cholesteatoma** is a non-neoplastic, keratinizing squamous epithelium-lined sac found within the middle ear or mastoid. Despite its name, it is neither a tumor nor primarily composed of cholesterol. **1. Why the Correct Answer is Right:** The hallmark of cholesteatoma is its ability to **erode bone**. This occurs through two primary mechanisms: * **Enzymatic Activity:** It produces osteolytic enzymes (such as Collagenase, Acid phosphatase, and Protease) and cytokines (TNF-α, IL-1) that activate osteoclasts. * **Pressure Necrosis:** As the keratin debris accumulates, the expanding sac exerts physical pressure on the surrounding bony structures (ossicles, otic capsule, and mastoid). **2. Analysis of Incorrect Options:** * **Option A:** While not a malignancy, calling it "benign" is clinically misleading. It is often described as **"locally invasive"** or "bone-destroying" because it can cause life-threatening complications (e.g., meningitis, brain abscess). * **Option B:** It is an epithelial cyst, not a cancer; therefore, it **does not metastasize** to lymph nodes or distant organs. * **Option C:** The name is a misnomer. It consists of **keratin debris**, not cholesterol. Cholesterol granuloma is a separate entity. **3. NEET-PG High-Yield Pearls:** * **Microscopic appearance:** Keratinizing stratified squamous epithelium with a "shiny white" or "pearly" appearance. * **Earliest bone eroded:** The **Long process of the Incus** (most common) or the **Scutum**. * **Theories of Origin:** Wittmaack’s (Retraction pocket), Habermann’s (Migration), and Sade’s (Metaplasia). * **Complications:** Can lead to a **Fistula of the Lateral Semicircular Canal** (most common canal involved) and Facial nerve palsy.

Question 1

Surfer's ear differs from osteoma in that it is:

Accepted Answer

Sessile

Answer

Unilateral

Answer

Single

Answer

Seen in cartilaginous canal

Question 2

What is true about Bell's palsy?

Accepted Answer

There is no role for steroids in its management.

Answer

It is the most common cause of facial palsy.

Answer

It is associated with tinnitus and vertigo.

Answer

It can present with crocodile tears and synkinesis.

Question 3

Exostosis due to repetitive exposure to cold water is common in which part of the temporal bone?

Accepted Answer

Tympanic part

Answer

Squamous part

Answer

Petrous part

Answer

Mastoid part

Question 4

Entry of bacteria through which space could lead to an infection in the mastoid air cells?

Accepted Answer

Nasopharyngeal tube

Answer

Cochlea

Answer

External acoustic meatus

Answer

Internal acoustic meatus

Question 5

Which of the following is true about cholesteatoma (atticoantral)?

Accepted Answer

Scanty, malodorous discharge

Answer

Otaliga

Answer

Central perforation

Answer

Ossicular involvement

Question 6

A 38-year-old male presented with a suspected diagnosis of suppurative labyrinthitis. An initial examination revealed a positive Rinne's test and a positive fistula test. The patient refused treatment and returned to the emergency department after 2 weeks complaining of deafness in the affected ear. On re-examination, the fistula test was observed to be negative. What is the likely expected finding on repeating the Rinne's test?

Accepted Answer

False Negative Rinne's Test

Answer

True Positive Rinne's Test

Answer

False Positive Rinne's Test

Answer

True Negative Rinne's Test

Question 7

Otosclerosis characteristically presents with which type of hearing loss?

Accepted Answer

Conductive hearing loss

Answer

Sensorineural hearing loss

Answer

Mixed hearing loss

Answer

Fluctuating hearing loss

Question 8

Selective low frequency sensorineural hearing loss occurs in which condition?

Accepted Answer

Meniere's disease

Answer

Benign Paroxysmal Positional Vertigo (BPPV)

Answer

Glomus tumour

Answer

Schwannoma

Question 9

What is true about cholesteatoma?

Accepted Answer

It erodes the bone.

Answer

It is a benign condition.

Answer

It metastasizes to lymph nodes.

Answer

It contains cholesterol.

Question 10

Cauliflower ear is typically seen in which of the following conditions?

Accepted Answer

Post-traumatic cases

Answer

Pseudomonas infection

Answer

Aspergillus infection

Answer

Tuberculosis

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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