Neurotology Practice Questions

Q: What is the treatment of choice for Bell's palsy?

Corticosteroids. **Explanation:** **Bell’s palsy** is an idiopathic, lower motor neuron (LMN) facial nerve paralysis caused by inflammation and edema of the nerve within the narrow facial canal. **Why Corticosteroids are the Treatment of Choice:** The primary pathology is nerve swelling leading to secondary ischemia. **Systemic Corticosteroids** (e.g., Prednisolone 1 mg/kg/day for 5–10 days) are the gold standard because they reduce inflammation and edema, preventing permanent axonal degeneration. Clinical trials (like the ASSET trial) confirm that steroids significantly improve the rate of complete recovery if started within **72 hours** of onset. **Analysis of Incorrect Options:** * **Surgical Decompression:** Reserved only for refractory cases where electroneurography (ENoG) shows >90% degeneration within the first 14 days. It is not the first-line treatment. * **Electrical Stimulation:** This is generally discouraged as it may promote synkinesis (abnormal mass movements) and has no proven benefit in nerve regeneration. * **Antiviral Drugs:** While Herpes Simplex Virus (HSV-1) is a suspected cause, monotherapy with antivirals (e.g., Acyclovir) is ineffective. They are only used as an **adjunct** to steroids in severe cases (House-Brackmann Grade IV or higher). **Clinical Pearls for NEET-PG:** * **Most common cause of facial palsy:** Bell’s Palsy (Idiopathic). * **House-Brackmann Scale:** Used to grade the severity of facial nerve injury (Grade I is normal; Grade VI is total paralysis). * **Schirmer’s Test:** Used to localize the lesion; if reduced, the lesion is at or proximal to the geniculate ganglion. * **Eye Care:** The most important supportive measure is preventing corneal ulceration using artificial tears and nighttime taping.

Q: A 70-year-old male presents with loss of sensation in the external auditory meatus (Hitselberger sign positive). What is the likely diagnosis?

Vestibular Schwannoma. ### Explanation **Correct Option: A. Vestibular Schwannoma** The **Hitselberger sign** is a classic clinical finding in Vestibular Schwannoma (Acoustic Neuroma). It refers to **hypesthesia (loss of sensation) of the posterior-superior wall of the external auditory canal**. **Pathophysiology:** This occurs due to compression of the **sensory fibers of the Facial Nerve (Nervus Intermedius)** as the tumor expands within the internal auditory canal or the cerebellopontine angle. Since the facial nerve and vestibulocochlear nerve travel together, large tumors often involve the facial nerve's sensory component before motor weakness (facial palsy) becomes clinically evident. **Why the other options are incorrect:** * **B. Mastoiditis:** This is an acute bacterial infection of the mastoid air cells. It presents with ear pain, fever, and post-auricular swelling/tenderness, not localized sensory loss in the canal. * **C. Bell's palsy:** This is an idiopathic lower motor neuron facial nerve paralysis. While it involves the facial nerve, it primarily presents with acute motor weakness (drooping of the face). Hitselberger sign is specifically associated with the slow compression seen in tumors. * **D. Cholesteatoma:** While a cholesteatoma can erode the canal wall or cause facial nerve palsy via bony destruction, it does not typically present with the isolated Hitselberger sign. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Symptom:** Progressive unilateral sensorineural hearing loss (SNHL) and tinnitus. * **Earliest Sign:** Loss of corneal reflex (due to Trigeminal nerve involvement). * **Hitselberger Sign:** Indicates involvement of the sensory branch of the VIIth cranial nerve. * **Gold Standard Investigation:** Gadolinium-enhanced MRI of the Brain/CP angle. * **Audiometry:** Characterized by "Retrocochlear" pathology (Poor speech discrimination score out of proportion to the hearing loss).

Q: Fluctuating deafness is a characteristic symptom of which condition?

Meniere's disease. **Explanation:** **Meniere’s Disease (Endolymphatic Hydrops)** is characterized by the classic triad of episodic vertigo, tinnitus, and **fluctuating sensorineural hearing loss (SNHL)**. The underlying pathology is the distension of the endolymphatic system due to increased pressure (hydrops). During an attack, the increased pressure affects the hair cells, leading to low-frequency hearing loss. As the pressure subsides between episodes, hearing often improves, creating the "fluctuating" pattern. Over time, however, the hearing loss may become permanent and involve all frequencies. **Why other options are incorrect:** * **Otosclerosis:** Characterized by **progressive**, painless, bilateral conductive hearing loss (CHL). It is not fluctuating. A key finding is Carhart’s notch at 2000 Hz. * **CSOM:** Presents with persistent or recurrent ear discharge and a permanent perforation of the tympanic membrane, leading to a **stable or slowly progressive** conductive hearing loss. * **ASOM:** Presents with acute ear pain and fever. While hearing is reduced due to fluid/pus in the middle ear, it is an **acute, temporary** impairment that resolves once the infection is treated, rather than a chronic fluctuating pattern. **High-Yield Clinical Pearls for NEET-PG:** * **Hearing Loss Pattern:** In early Meniere’s, the SNHL typically affects **low frequencies** (rising curve on audiometry). * **Lermoyez Syndrome:** A variant of Meniere’s where hearing *improves* during a vertigo attack. * **Glycerol Test:** Used for diagnosis; glycerol (an osmotic diuretic) temporarily reduces hydrops, leading to an improvement in speech discrimination and hearing thresholds. * **Tinnitus:** Classically described as "low-pitched roaring" or "seashell" tinnitus.

Q: Which of the following is true about vestibular schwannoma?

Unilateral hearing loss is a common presentation. **Explanation:** **Vestibular Schwannoma** (Acoustic Neuroma) is a benign, slow-growing tumor arising from the Schwann cells of the vestibular nerve (most commonly the inferior vestibular nerve). 1. **Why Option A is correct:** Progressive **unilateral sensorineural hearing loss (SNHL)** is the most common presenting symptom (occurring in >90% of patients). It is often accompanied by high-pitched tinnitus. Even though the tumor arises from the vestibular nerve, hearing loss occurs early due to the compression of the adjacent cochlear nerve within the narrow internal auditory canal. 2. **Why Option B is incorrect:** Vestibular schwannomas are **benign** (WHO Grade I) tumors. Malignant transformation is extremely rare. 3. **Why Option C is incorrect:** While it is a very common CP angle tumor, the phrasing in medical exams often distinguishes between "most common" and "most common nerve tumor." However, in the context of this specific question set, Option A is the most definitive clinical "truth" regarding presentation. (Note: It actually accounts for ~80% of CP angle tumors, but Option A is the classic clinical hallmark). 4. **Why Option D is incorrect:** While it does cause sensorineural deafness, Option A is a more specific clinical description of the *presentation* (unilateral). **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Gadolinium-enhanced MRI of the Internal Auditory Canal (IAC). * **Audiometry:** Shows SNHL with poor **Speech Discrimination Scores (SDS)** out of proportion to the pure tone loss. * **Roll-over Phenomenon:** Characteristic finding on speech audiometry. * **Bilateral Vestibular Schwannomas:** Pathognomonic for **Neurofibromatosis Type 2 (NF2)**; caused by a mutation on Chromosome 22. * **Hitselberger’s Sign:** Hypesthesia of the posterior external auditory canal wall due to compression of facial nerve sensory fibers.

Q: Which of the following signs is NOT associated with a glomus tumor?

Griesinger's sign. **Explanation** **Griesinger's sign** is the correct answer because it is associated with **Lateral (Sigmoid) Sinus Thrombosis**, not glomus tumors. It refers to edema and tenderness over the mastoid process resulting from thrombosis and inflammation of the mastoid emissary vein. **Analysis of Glomus Tumor Signs (Incorrect Options):** Glomus tumors (Paragangliomas) are highly vascular tumors arising from the chemoreceptor cells. The following signs are characteristic: * **Rising Sun Appearance:** On otoscopy, a red/pink fleshy mass is seen behind the intact tympanic membrane, typically arising from the floor of the middle ear (Glomus jugulare) or the promontory (Glomus tympanicum). * **Brown’s Sign:** When pressure is increased in the external auditory canal using a Siegle’s speculum, the tumor pulsates more vigorously and then blanches (pales) due to the compression of its vascular supply. * **Aquino’s Sign:** Pulsations of the tumor or the patient’s synchronous tinnitus are reduced or abolished by manual compression of the ipsilateral common carotid artery. **High-Yield Clinical Pearls for NEET-PG:** * **Phelps’ Sign:** Loss of the bony septum between the jugular bulb and the carotid canal (seen on CT). * **Salt and Pepper Appearance:** Classic MRI finding (T2 weighted) representing high-flow voids (pepper) and areas of hemorrhage/slow flow (salt). * **Treatment of Choice:** Surgical excision (e.g., Transcanal or Hypotympanotomy for Glomus tympanicum). Pre-operative embolization is often used to reduce vascularity. * **Rule of 10s:** 10% are familial, 10% are multicentric, and 10% are functional (secreting catecholamines).

Q: A 23-year-old patient presents with a 7-8 day history of fever, chills, and headache. The patient also reports intermittent purulent ear discharge and retro-orbital pain. On examination, mild ptosis is noted. What is the likely diagnosis?

Gradenigo's syndrome. ### Explanation **Gradenigo’s Syndrome** is a classic complication of apical petrositis (infection of the petrous apex of the temporal bone), usually arising from chronic suppurative otitis media (CSOM). The diagnosis is based on the **Gradenigo’s Triad**: 1. **Persistent Ear Discharge:** Evidence of middle ear infection/petrositis. 2. **Retro-orbital Pain:** Due to irritation of the **Trigeminal nerve (CN V)** ganglion (Gasserian ganglion) in Meckel’s cave. 3. **Abducens Nerve Palsy (CN VI):** Occurs as the nerve passes through Dorello’s canal. This leads to diplopia and lateral rectus weakness. *Note:* While the triad specifies CN VI palsy, associated inflammation can occasionally involve the sympathetic plexus around the carotid, leading to **mild ptosis** (Horner’s syndrome features), as seen in this clinical vignette. #### Why the other options are incorrect: * **Gressinger’s Syndrome:** Refers to edema over the mastoid process due to thrombosis of the mastoid emissary vein, a sign of **Lateral Sinus Thrombosis**. * **Styloid Syndrome (Eagle’s Syndrome):** Characterized by an elongated styloid process causing recurrent throat pain, dysphagia, and facial pain, typically following a tonsillectomy. It does not present with fever or ear discharge. * **Peritonsillar Abscess (Quinsy):** A complication of tonsillitis presenting with "hot potato" voice, trismus, and uvular deviation. It does not cause retro-orbital pain or cranial nerve palsies. #### High-Yield Clinical Pearls for NEET-PG: * **Dorello’s Canal:** The anatomical site where the 6th cranial nerve is compressed in petrositis. * **Investigation of Choice:** Contrast-enhanced CT (CECT) or MRI of the temporal bone to visualize petrous apex opacification. * **Management:** High-dose intravenous antibiotics and surgical drainage (Petrosectomy) if medical management fails.

Q: A man presented with pulsatile tinnitus and hearing loss. A vascular mass is seen behind the tympanic membrane. What is the most likely diagnosis?

Glomus jugulare. ### Explanation The clinical presentation of **pulsatile tinnitus** associated with a **vascular mass** behind the tympanic membrane is a classic hallmark of a **Glomus tumor** (Paraganglioma). **1. Why Glomus Jugulare is Correct:** Glomus tumors are highly vascular, slow-growing benign neoplasms arising from paraganglionic tissue. * **Pulsatile Tinnitus:** This occurs because the tumor is extremely vascular and sits in close proximity to the ear's conductive mechanism; the patient literally hears their own heartbeat. * **Vascular Mass:** On otoscopy, this appears as a "Rising Sun" appearance (reddish-blue mass) behind the intact tympanic membrane. * **Brown’s Sign:** A classic clinical sign where the mass pulsates more vigorously when the ear canal pressure is increased with a pneumatic otoscope. **2. Why Other Options are Incorrect:** * **Carcinoma of the Mastoid:** Usually presents with foul-smelling bloody discharge, deep-seated pain, and cranial nerve palsies. It appears as a friable, irregular mass rather than a smooth vascular one. * **Acoustic Neuroma:** A tumor of the 8th cranial nerve. It presents with **non-pulsatile** tinnitus and sensorineural hearing loss. There are no findings behind the tympanic membrane. * **Angiofibroma:** While highly vascular, this is a nasopharyngeal tumor typically seen in adolescent males. It presents with epistaxis and nasal obstruction, not a middle ear mass. **3. NEET-PG High-Yield Pearls:** * **Phelps Sign:** Loss of bony plate between the jugular bulb and the floor of the middle ear (seen on CT). * **Aquino’s Sign:** Pulsations of the mass cease upon carotid artery compression. * **Treatment of Choice:** Surgical excision (e.g., via a skull base approach). Pre-operative embolization is often used to reduce vascularity. * **Investigation of Choice:** Contrast-enhanced MRI and CT (Salt and Pepper appearance on MRI).

Question 1

What is the treatment of choice for Bell's palsy?

Accepted Answer

Corticosteroids

Answer

Surgical decompression

Answer

Electrical stimulation

Answer

Antiviral drugs

Question 2

A 70-year-old male presents with loss of sensation in the external auditory meatus (Hitselberger sign positive). What is the likely diagnosis?

Accepted Answer

Vestibular Schwannoma

Answer

Mastoiditis

Answer

Bell's palsy

Answer

Cholesteatoma

Question 3

Fluctuating deafness is a characteristic symptom of which condition?

Accepted Answer

Meniere's disease

Answer

Otosclerosis

Answer

Chronic suppurative otitis media (CSOM)

Answer

Acute suppurative otitis media (ASOM)

Question 4

Which of the following is not true about Bell's palsy?

Accepted Answer

Spontaneous remission

Answer

Acute onset

Answer

Recurrent

Answer

Increased predisposition in Diabetes Mellitus

Question 5

Which of the following is a favorable prognostic indicator in Bell's palsy?

Accepted Answer

Persistence of the stapedial reflex

Answer

Hyperacusis

Answer

Severe taste impairment

Answer

Complete paralysis within a week

Question 6

Which of the following is true about vestibular schwannoma?

Accepted Answer

Unilateral hearing loss is a common presentation

Answer

It is mostly malignant

Answer

It is the most common tumor of the cerebellopontine angle

Answer

It presents with sensorineural deafness

Question 7

Which of the following signs is NOT associated with a glomus tumor?

Accepted Answer

Griesinger's sign

Answer

Rising sun appearance

Answer

Aquino's sign

Answer

Brown's sign

Question 8

A 23-year-old patient presents with a 7-8 day history of fever, chills, and headache. The patient also reports intermittent purulent ear discharge and retro-orbital pain. On examination, mild ptosis is noted. What is the likely diagnosis?

Accepted Answer

Gradenigo's syndrome

Answer

Gressinger's syndrome

Answer

Styloid syndrome

Answer

Peritonsilar abscess

Question 9

A man presented with pulsatile tinnitus and hearing loss. A vascular mass is seen behind the tympanic membrane. What is the most likely diagnosis?

Accepted Answer

Glomus jugulare

Answer

Carcinoma of the mastoid

Answer

Acoustic neuroma

Answer

Angiofibroma

Question 10

In facial nerve palsy of the right side, the stapedial reflex is absent on which side?

Accepted Answer

Right side

Answer

Left side

Answer

Both sides

Answer

Not absent

Neurotology — MCQs

Neurotology — MCQs

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