Neurotology Practice Questions

Q: The diagnosis in a patient with 6th nerve palsy, retro-orbital pain and persistent ear discharge is -

Gradenigo's syndrome. ***Gradenigo's syndrome*** - This syndrome is characterized by a triad of symptoms: **6th nerve palsy** (diplopia due to lateral rectus muscle paralysis), **retro-orbital pain** (due to trigeminal nerve involvement), and **persistent ear discharge** (indicating otitis media or mastoiditis). - It arises from inflammation or infection (often **petrous apicitis**) spreading from the middle ear to the adjacent petrous apex, affecting cranial nerves VI and V. *Frey's syndrome* - This syndrome is also known as **auriculotemporal syndrome** and is characterized by sweating and flushing in the distribution of the auriculotemporal nerve during eating. - It typically occurs after trauma or surgery to the parotid gland, leading to aberrant reinnervation of sweat glands by parasympathetic fibers. *Rendu-Osler-Weber disease* - This is an autosomal dominant disorder also known as **hereditary hemorrhagic telangiectasia (HHT)**. - It is characterized by widespread **telangiectasias** and **arteriovenous malformations**, often presenting with recurrent epistaxis, gastrointestinal bleeding, and visceral malformations. *Sjogren's syndrome* - This is a chronic autoimmune disease characterized by **dry eyes (keratoconjunctivitis sicca)** and **dry mouth (xerostomia)**, due to lymphocytic infiltration of exocrine glands. - It may also involve systemic manifestations but does not typically present with 6th nerve palsy or ear discharge.

Q: Most common cause of facial nerve palsy is -

Bell's Palsy. ***Bell's Palsy*** - **Bell's Palsy** is the most common cause of **unilateral facial nerve palsy**, accounting for approximately 70% of all cases. It is an **idiopathic** condition, meaning its exact cause is unknown, but it is often linked to viral infections like HSV-1 [1]. - It presents as an **acute onset of facial muscle weakness or paralysis** on one side, involving both the upper and lower face. Unlike Bell's palsy, lesions with an upper motor neuron origin partly spare the upper face [1]. *Sarcoidosis* - **Sarcoidosis** can cause facial nerve palsy, but it is a relatively uncommmon etiology, often associated with other systemic symptoms like **uveitis** or **parotid enlargement**. - Facial palsy in sarcoidosis is part of a broader neurological manifestation and is much less frequent than Bell's Palsy. *Acoustic neuroma* - An **acoustic neuroma** (vestibular schwannoma) is a tumor that grows on the **vestibulocochlear nerve (CN VIII)**. It typically causes hearing loss, tinnitus, and balance issues [2]. - While it can eventually affect the facial nerve (CN VII) due to its proximity, facial nerve involvement is usually *not* the primary or most common presenting symptom, nor is it the most common cause of facial nerve palsy overall [2]. *VZV* - **Varicella-zoster virus (VZV)** infection can cause facial nerve palsy in the form of **Ramsay Hunt syndrome (Herpes zoster oticus)**. This is characterized by facial palsy accompanied by a painful **vesicular rash** in the ear canal or on the auricle. - While a significant cause of facial palsy, it is less common than Bell's Palsy and has distinct associated symptoms.

Q: All of the following are true about Schwannomas except:

Commonly arises from Superior vestibular nerve. ***Commonly arises from Superior vestibular nerve*** * **Schwannomas** (vestibular schwannomas) most commonly arise from the **inferior vestibular nerve**, not the superior vestibular nerve. * This origin frequently impacts the nearby **cochlear nerve** and, less commonly, the facial nerve. * *Gd enhanced MRI is the most sensitive investigation* * **Gadolinium-enhanced MRI** is indeed the **most sensitive and specific imaging modality** for detecting even small schwannomas, especially in the internal auditory canal [1]. * It effectively visualizes the tumor's characteristic enhancement pattern, crucial for early diagnosis and monitoring. * *Leads to Retrocochlear hearing loss* * Schwannomas compress the **cochlear nerve**, leading to a **retrocochlear pattern of hearing loss**, characterized by poor speech discrimination out of proportion to pure tone loss [1]. * This type of hearing loss is a classic presentation and helps differentiate it from cochlear pathologies. * *Hitzelberger's sign is due to involvement of 7th nerve* * **Hitzelberger's sign** refers to hypesthesia (decreased sensation) in the posterior wall of the external auditory canal due to involvement of the **facial nerve (VII) branch** supplying this area. * This can be an early indicator of a schwannoma compressing the facial nerve [1].

Q: True about Glomus jugulare are all EXCEPT:

Invades epitympanum. ***Invades epitympanum*** - Glomus jugulare tumors typically arise from the **jugular bulb** and primarily affect the **hypotympanum and mesotympanum**, causing bone erosion of the **jugular foramen** and temporal bone. - Epitympanum invasion is more characteristic of **glomus tympanicum** tumors (which arise from the promontory or tympanic plexus), NOT glomus jugulare. - While glomus jugulare can extend superiorly with growth, the **epitympanum is not the primary or characteristic site of invasion** for this tumor type. *Involves 9th and 10th cranial nerve* - **Glomus jugulare tumors** are often associated with cranial nerve palsies due to their proximity to the **jugular foramen**, which transmits the **glossopharyngeal (IX)** and **vagus (X)** nerves. - Compression or invasion of these nerves can lead to symptoms like **dysphagia**, **hoarseness**, or **vocal cord paralysis**. *Rising sun sign is seen* - The **"rising sun" sign** refers to the reddish-blue hue observed behind the tympanic membrane in a patient with a **glomus tumor**, caused by the highly vascularized mass in the middle ear. - This sign is a classic clinical finding indicating the presence of a **middle ear mass**, often a glomus tumor. *Pulsatile tinnitus is seen* - **Pulsatile tinnitus** is a very common symptom of **glomus jugulare tumors**, due to their highly vascular nature and blood flow creating a sound synchronous with the patient's heartbeat. - The patient often describes hearing a **"whooshing"** or **"thumping"** sound in the ear.

Q: Progressive loss of hearing, tinnitus and ataxia are commonly seen in a case of -

Acoustic neuroma. ***Acoustic neuroma*** - This benign tumor arises from the **vestibulocochlear nerve (cranial nerve VIII)**, leading to **progressive unilateral hearing loss**, **tinnitus**, and **ataxia** as it compresses the adjacent cerebellum [1]. - The symptoms are progressive and often insidious, reflecting the slow growth of the tumor, and are highly characteristic for this condition [1]. *Otitis media* - **Otitis media** is an **inflammation/infection of the middle ear**, primarily causing ear pain, ear discharge, and conductive hearing loss. - While it causes hearing loss, it typically presents with acute symptoms and does not typically cause **tinnitus** or **ataxia** unless there are severe complications affecting the inner ear or brain. *Ependymoma* - **Ependymomas** are tumors originating from the **ependymal cells** lining the ventricles and spinal cord, often causing symptoms related to increased intracranial pressure (headache, nausea) or spinal cord compression. - They do not typically present with the specific triad of **progressive hearing loss**, **tinnitus**, and **ataxia** characteristic of acoustic neuroma. *Cerebral glioma* - **Cerebral gliomas** are brain tumors that arise from glial cells and present with a wide range of neurological symptoms depending on their location, such as **seizures**, **weakness**, or **cognitive changes**. - They are unlikely to present with the specific combination of **progressive hearing loss**, **tinnitus**, and **ataxia** unless located in the brainstem or cerebellum in a way that specifically compresses the eighth cranial nerve and cerebellar pathways, which is less common than for an acoustic neuroma.

Q: Site for placing an electrode in auditory brain stem implant is?

Recess of fourth ventricle. ***Recess of fourth ventricle*** - The auditory brainstem implant (ABI) electrode arrays are typically placed on the surface of the **cochlear nucleus**, which lies in the **lateral recess of the fourth ventricle and cerebellopontine angle**. - This placement allows direct stimulation of the central auditory pathways, bypassing a damaged or absent auditory nerve. *Round window* - The round window is the site for electrode placement in a **cochlear implant**, not an auditory brainstem implant. - A cochlear implant stimulates the **auditory nerve terminals** within the cochlea. *Sinus tympani* - The sinus tympani is an **anatomical space** within the middle ear. - It is not a site for implant electrode placement for either cochlear or brainstem implants. *Lateral ventricle* - The lateral ventricles are spaces within the brain that contain **cerebrospinal fluid** and are not directly involved in the auditory pathway for implant stimulation. - Implants for hearing are generally directed towards the auditory neural structures.

Q: A patient presents with gradual hearing loss, bilateral tinnitus, and imbalance. MRI reveals bilateral vestibular schwannomas. What is the likely diagnosis?

Neurofibromatosis type 2. **Neurofibromatosis type 2** * The constellation of **bilateral vestibular schwannomas** (also known as acoustic neuromas) [1] in conjunction with hearing loss, tinnitus, and imbalance is the hallmark of **Neurofibromatosis type 2 (NF2)**. * NF2 is an autosomal dominant genetic disorder characterized by the development of multiple tumors of the central and peripheral nervous systems, with **bilateral vestibular schwannomas** being the most common and defining feature. * *Multiple sclerosis* * While multiple sclerosis (MS) can cause neurological symptoms like imbalance and hearing problems, it is characterized by **demyelinating lesions** throughout the central nervous system, not bilateral vestibular schwannomas. * MRI in MS would typically show multifocal white matter lesions, not discrete cranial nerve tumors. * *Meniere’s disease* * Meniere's disease presents with episodic **vertigo, fluctuating hearing loss, tinnitus, and aural fullness**, which are often unilateral [2]. * The defining characteristic is endolymphatic hydrops, and MRI does not typically show vestibular schwannomas. * *Acoustic neuroma* * An **acoustic neuroma** (vestibular schwannoma) is a tumor on the vestibulocochlear nerve (cranial nerve VIII) that can cause hearing loss, tinnitus, and imbalance [1]. * However, presenting with **bilateral acoustic neuromas** strongly points to the underlying genetic condition of Neurofibromatosis type 2, rather than an isolated, unilateral acoustic neuroma.

Q: A 35-year-old man presents with progressive right-sided hearing loss, balance difficulties, and headaches. MRI reveals an enhancing mass in the cerebellopontine angle. Most likely diagnosis?

Acoustic neuroma. ***Acoustic neuroma*** - The combination of **progressive unilateral hearing loss**, **balance difficulties**, and **headaches**, along with an **enhancing mass in the cerebellopontine angle** on MRI, is highly characteristic of an acoustic neuroma (vestibular schwannoma). - These are benign tumors that arise from the **vestibulocochlear nerve (cranial nerve VIII)**, causing compression of adjacent structures. *Vestibular neuritis* - This condition presents with **sudden onset, severe vertigo** often triggered by head movement, but it is typically **acute and self-limiting**, without a progressive course or an intracranial mass. - **Hearing is usually spared** in vestibular neuritis, which is inconsistent with the patient's progressive hearing loss. *Otosclerosis* - Otosclerosis is a disease of abnormal bone remodeling in the middle ear, leading to **progressive conductive hearing loss**, often bilateral. - It does **not typically cause balance difficulties** or present as a **cerebellopontine angle mass** on MRI. *Meniere's disease* - Characterized by a triad of **fluctuating hearing loss**, **episodic vertigo**, and **tinnitus**, often with a sensation of aural fullness. - While it causes hearing loss and balance issues, it does **not involve an enhancing mass** in the cerebellopontine angle.

Q: Which of the following is a common presenting symptom of vestibular schwannoma?

Unilateral tinnitus. ***Unilateral tinnitus*** - **Unilateral tinnitus** is one of the most common presenting symptoms of vestibular schwannoma, occurring in 60-70% of cases - Results from **compression or irritation of the vestibulocochlear nerve (CN VIII)** - Often accompanies or precedes **unilateral sensorineural hearing loss** (the most common presenting symptom at 90-95%) - Typically described as a **high-pitched ringing or buzzing** in the affected ear *Conductive hearing loss* - Vestibular schwannoma causes **sensorineural hearing loss**, not conductive hearing loss - The tumor arises from Schwann cells of the **vestibular portion of CN VIII** and affects the auditory nerve directly - **Conductive hearing loss** results from middle or outer ear pathology (otosclerosis, otitis media, cerumen impaction) *Facial pain* - **Facial pain** suggests **trigeminal nerve (CN V)** involvement, as in trigeminal neuralgia - While large vestibular schwannomas can eventually compress CN V, causing **facial numbness**, this is a late finding - **Facial pain** is not a common presenting symptom of vestibular schwannoma *Nasal obstruction* - **Nasal obstruction** relates to nasal or sinus pathology (rhinitis, polyps, deviated septum) - Has no anatomical connection to vestibular schwannoma, which arises in the **cerebellopontine angle** or **internal auditory canal**

Q: A 45-year-old male presents with unilateral tinnitus and gradual hearing loss. An MRI shows a tumor in the cerebellopontine angle. What is the most likely diagnosis?

Schwannoma. ***Schwannoma*** - A **vestibular schwannoma**, also known as an acoustic neuroma, is the most common tumor of the **cerebellopontine angle**, typically causing **unilateral tinnitus** and **gradual sensorineural hearing loss** [1]. - It arises from the **Schwann cells** of the vestibulocochlear nerve (cranial nerve VIII). *Meningioma* - While meningiomas can occur in the **cerebellopontine angle**, they more commonly present with **cranial nerve deficits** and **headaches**, and often have a broader dural base on imaging. - They tend to grow slower and are usually found incidentally or at a later stage of disease and are not the most likely diagnosis in this specific presentation. *Metastasis* - **Metastatic tumors** to the brain are usually multiple and are typically associated with a known primary cancer site. - While possible, a solitary lesion in the cerebellopontine angle with this specific symptom profile would make metastasis less likely as the primary diagnosis without other contributing factors. *Cholesteatoma* - A **cholesteatoma** is a non-cancerous growth in the middle ear, often associated with a history of **chronic ear infections** and typically causing **conductive hearing loss**, otorrhea, and sometimes facial nerve palsy. - It does not typically present as a tumor in the **cerebellopontine angle** on MRI with the described symptoms.

Question 1

The diagnosis in a patient with 6th nerve palsy, retro-orbital pain and persistent ear discharge is -

Accepted Answer

Gradenigo's syndrome

Answer

Frey's syndrome

Answer

Rendu-Osler-Weber disease

Answer

Sjogren's syndrome

Question 2

Most common cause of facial nerve palsy is -

Accepted Answer

Bell's Palsy

Answer

Sarcoidosis

Answer

Acoustic neuroma

Answer

VZV

Question 3

All of the following are true about Schwannomas except:

Accepted Answer

Commonly arises from Superior vestibular nerve

Answer

Gd enhanced MRI is the most sensitive investigation

Answer

Leads to Retrocochlear hearing loss

Answer

Hitzelberger's sign is due to involvement of 7th nerve

Question 4

True about Glomus jugulare are all EXCEPT:

Accepted Answer

Invades epitympanum

Answer

Involves 9th and 10th cranial nerve

Answer

Rising sun sign is seen

Answer

Pulsatile tinnitus is seen

Question 5

Progressive loss of hearing, tinnitus and ataxia are commonly seen in a case of -

Accepted Answer

Acoustic neuroma

Answer

Otitis media

Answer

Ependymoma

Answer

Cerebral glioma

Question 6

Site for placing an electrode in auditory brain stem implant is?

Accepted Answer

Recess of fourth ventricle

Answer

Round window

Answer

Sinus tympani

Answer

Lateral ventricle

Question 7

A patient presents with gradual hearing loss, bilateral tinnitus, and imbalance. MRI reveals bilateral vestibular schwannomas. What is the likely diagnosis?

Accepted Answer

Neurofibromatosis type 2

Answer

Multiple sclerosis

Answer

Meniere’s disease

Answer

Acoustic neuroma

Question 8

A 35-year-old man presents with progressive right-sided hearing loss, balance difficulties, and headaches. MRI reveals an enhancing mass in the cerebellopontine angle. Most likely diagnosis?

Accepted Answer

Acoustic neuroma

Answer

Vestibular neuritis

Answer

Otosclerosis

Answer

Meniere's disease

Question 9

Which of the following is a common presenting symptom of vestibular schwannoma?

Accepted Answer

Unilateral tinnitus

Answer

Conductive hearing loss

Answer

Facial pain

Answer

Nasal obstruction

Question 10

A 45-year-old male presents with unilateral tinnitus and gradual hearing loss. An MRI shows a tumor in the cerebellopontine angle. What is the most likely diagnosis?

Accepted Answer

Schwannoma

Answer

Meningioma

Answer

Metastasis

Answer

Cholesteatoma

Neurotology — MCQs

Neurotology — MCQs

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