Diseases of the Ear Practice Questions

Q: In Ramsay Hunt syndrome, which cranial nerve is involved?

Facial. **Explanation:** **Ramsay Hunt Syndrome (Herpes Zoster Oticus)** is caused by the reactivation of the **Varicella-Zoster Virus (VZV)** dormant in the **Geniculate Ganglion** of the **Facial Nerve (CN VII)**. 1. **Why Facial Nerve is Correct:** The virus travels along the sensory fibers of the facial nerve, leading to the classic clinical triad: **ipsilateral facial nerve palsy** (Lower Motor Neuron type), **otalgia** (ear pain), and **vesicular eruptions** in the external auditory canal, concha, or pinna. It may also involve the vestibulocochlear nerve (CN VIII), causing vertigo or hearing loss. 2. **Why Incorrect Options are Wrong:** * **Trigeminal (CN V):** While VZV can affect the Gasserian ganglion (causing Herpes Zoster Ophthalmicus), it is not the primary nerve involved in Ramsay Hunt Syndrome. * **Glossopharyngeal (CN IX):** This nerve provides sensation to the posterior third of the tongue and oropharynx; its involvement is rare and does not define this syndrome. * **Oculomotor (CN III):** This is a motor nerve for eye movements; it is not associated with the cutaneous vesicular patterns of VZV reactivation in the ear. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Primarily clinical; Tzanck smear shows multinucleated giant cells. * **Prognosis:** The facial palsy 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 **Corticosteroids**. * **Hitches’ Rule:** Vesicles may also appear on the anterior 2/3rd of the tongue or soft palate (via the chorda tympani and greater petrosal branches).

Q: A 30-year-old woman with a family history of hearing loss from her mother's side developed a hearing problem during pregnancy. The hearing loss is bilateral, slowly progressive, with bilateral tinnitus that bothers her at night. Pure tone audiometry shows conductive hearing loss with an apparent bone conduction hearing loss at 2000 Hz. What is the most likely diagnosis?

Otosclerosis. ### Explanation **Otosclerosis** is the most likely diagnosis based on the classic clinical triad presented: **bilateral progressive conductive hearing loss (CHL)**, a positive **family history** (autosomal dominant with incomplete penetrance), and **aggravation during pregnancy** (due to hormonal changes accelerating the remodeling of the otic capsule). The "apparent bone conduction hearing loss at 2000 Hz" is the pathognomonic **Carhart’s Notch**. This is not a true sensorineural loss but a mechanical artifact caused by the stapes fixation, which disrupts the natural resonance of the ossicular chain. #### Why the other options are incorrect: * **Acoustic Neuroma:** Presents with unilateral sensorineural hearing loss (SNHL) and balance issues, not bilateral CHL. It is not influenced by pregnancy. * **Otitis Media with Effusion (OME):** While it causes CHL, it is usually preceded by upper respiratory infections and does not typically present with a family history or a specific 2000 Hz notch. * **Sigmoid Sinus Thrombosis:** A serious complication of chronic suppurative otitis media (CSOM). It presents with "picket-fence" fever, headache, and signs of raised intracranial pressure, not isolated progressive hearing loss. #### High-Yield Clinical Pearls for NEET-PG: * **Schwartz Sign:** A flamingo-pink blush seen on the promontory through the TM, indicating active otosclerosis (Otospongiosis). * **Gelle’s Test:** Negative in otosclerosis (indicates fixed ossicles). * **Bezold’s Triad:** 1. Negative Rinne test, 2. Raised bone conduction threshold (Carhart’s notch), 3. Low-frequency hearing loss. * **Treatment of Choice:** Stapedotomy (using a Teflon piston). Sodium fluoride can be used to medically stabilize active disease.

Q: Which of the following is NOT a typical feature of malignant otitis externa?

Mitotic figures are high. **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 (osteomyelitis). ### **Explanation of the Correct Answer** **Option C (Mitotic figures are high)** is the correct answer because it is **NOT** a feature of MOE. High mitotic figures are a hallmark of **malignancy (cancer)**. Despite its name, "Malignant" Otitis Externa is an **infectious/inflammatory process**, not a neoplastic one. While it behaves "malignantly" by invading bone and surrounding tissues, a biopsy would show inflammatory cells and granulation tissue, not cancerous cells or increased mitosis. ### **Analysis of Incorrect Options** * **Option A:** **Pseudomonas aeruginosa** is the causative organism in more than 95% of cases. It produces exotoxins that cause tissue necrosis and vasculitis. * **Option B & D:** MOE characteristically affects **elderly patients** (usually >60 years) who are **immunocompromised**, most commonly due to poorly controlled **Diabetes Mellitus**. The microangiopathy of diabetes impairs perfusion, facilitating the spread of infection. ### **Clinical Pearls for NEET-PG** * **Pathognomonic Sign:** Presence of **granulation tissue** at the junction of the cartilaginous and bony part of the external auditory canal. * **Earliest Cranial Nerve Involved:** Facial nerve (VII), followed by IX, X, and XI as it spreads to the jugular foramen. * **Diagnosis:** **Technetium-99m scan** is the most sensitive for initial diagnosis (detects osteoblastic activity). * **Monitoring:** **Gallium-67 scan** or **Indium-111 labeled WBC scan** is used to monitor response to treatment and confirm resolution (as Technetium remains positive for months). * **Treatment:** Long-term IV antipseudomonal antibiotics (e.g., Ciprofloxacin, Ceftazidime) and strict glycemic control.

Q: In which syndrome is sensorineural hearing loss associated with abnormality of thyroxin synthesis?

Pendred syndrome. **Explanation:** **Pendred Syndrome** is an autosomal recessive disorder caused by a mutation in the **SLC26A4 gene**, which encodes the protein **pendrin**. Pendrin is an ion exchanger found in the inner ear and the thyroid gland. 1. **In the Thyroid:** It is responsible for iodide transport. A defect leads to impaired organification of iodine, resulting in a multinodular goiter (euthyroid or mildly hypothyroid). 2. **In the Inner Ear:** It leads to **bilateral sensorineural hearing loss (SNHL)**, typically associated with structural malformations like an **enlarged vestibular aqueduct (EVA)** or Mondini dysplasia. **Analysis of Incorrect Options:** * **Alport Syndrome:** Characterized by SNHL associated with **progressive renal failure** and ocular abnormalities (lenticonus) due to a defect in Type IV collagen. * **Klippel-Feil Syndrome:** Defined by the clinical triad of a short neck, low posterior hairline, and restricted neck motion due to **fused cervical vertebrae**. It may be associated with hearing loss (Wildervanck syndrome) but not thyroid issues. * **Usher Syndrome:** The most common cause of combined deafness and blindness. It involves SNHL associated with **Retinitis Pigmentosa**. **High-Yield Clinical Pearls for NEET-PG:** * **Perchlorate Discharge Test:** Historically used to diagnose Pendred syndrome; it shows an abnormal washout of iodine from the thyroid. * **Radiology:** The most common radiological finding in Pendred syndrome is a **dilated/enlarged vestibular aqueduct**. * **Mnemonic:** Remember **P**endred = **P**erchlorate test, **P**endrin protein, and **P**artial thyroid defect.

Q: Which of the following is NOT an extracranial complication of chronic suppurative otitis media?

Perisinus abscess. **Explanation:** Complications of Chronic Suppurative Otitis Media (CSOM) are broadly classified into two categories: **Intracranial** (within the cranial cavity) and **Extracranial** (outside the cranial cavity). **Why Perisinus Abscess is the correct answer:** A **Perisinus abscess** is an **intracranial complication**. It occurs when pus collects between the dural wall of the lateral sinus (sigmoid sinus) and the overlying mastoid bone. Since it involves the space within the skull and is often a precursor to lateral sinus thrombophlebitis, it is categorized as intracranial. **Analysis of Incorrect Options (Extracranial Complications):** * **Bezold’s Abscess:** A neck abscess formed when pus breaks through the thin inner table of the mastoid tip, tracking down into the **sternocleidomastoid muscle** sheath. * **Citelli’s Abscess:** Occurs when pus tracks through the mastoid tip or digastric fossa, following the posterior belly of the **digastric muscle** to the digastric triangle. * **Luc’s Abscess:** A subperiosteal abscess of the **external auditory canal** wall, resulting from pus tracking through the notch of Rivinus or a defect in the meatal bone. **High-Yield Clinical Pearls for NEET-PG:** * **Most common intracranial complication:** Meningitis (though some texts cite Extradural abscess). * **Most common extracranial complication:** Mastoiditis. * **Griesinger’s Sign:** Edema over the mastoid bone due to thrombosis of the mastoid emissary vein (seen in lateral sinus thrombosis). * **Zygomatic Abscess:** Pus tracks into the root of the zygoma, causing swelling in front of and above the pinna.

Q: All of the following are included in Gradenigo's triad EXCEPT:

Palatal palsy. **Explanation:** **Gradenigo’s Triad** is a classic clinical presentation of **Petrositis** (inflammation of the petrous apex), usually occurring as a complication of acute or chronic otitis media. The triad is caused by the spread of infection to the petrous part of the temporal bone, affecting structures in **Dorello’s canal** and the **Meckel’s cave** area. **Why Palatal Palsy is the Correct Answer:** Palatal palsy involves the Vagus (X) and Glossopharyngeal (IX) nerves. These nerves exit the skull via the jugular foramen, which is anatomically distant from the petrous apex. Therefore, palatal palsy is not a component of Gradenigo’s triad. **Analysis of Incorrect Options (Components of the Triad):** 1. **Abducent Nerve (VI) Palsy:** The 6th cranial nerve passes through Dorello’s canal beneath the petrosphenoid ligament. Inflammation at the petrous apex causes compression, leading to lateral rectus palsy and **diplopia**. 2. **Retro-orbital Pain:** This is due to involvement of the **Trigeminal (V) nerve** (specifically the Gasserian ganglion) in Meckel’s cave. The pain is typically distributed along the ophthalmic division. 3. **Aural Discharge:** Persistent ear discharge (otorrhea) is the third component, signifying the underlying middle ear infection or mastoiditis that led to the petrositis. **High-Yield Clinical Pearls for NEET-PG:** * **Anatomy:** Dorello’s canal is the key anatomical site for VI nerve involvement in petrositis. * **Diagnosis:** Contrast-enhanced MRI is the gold standard to visualize petrous apex opacification. * **Treatment:** Aggressive IV antibiotics and surgical drainage (e.g., cortical mastoidectomy with petrous apicectomy). * **Differential:** Do not confuse this with **Vernet’s Syndrome** (Jugular Foramen Syndrome), which involves CN IX, X, and XI.

Q: Middle ear infections can spread to the brain via all of the following routes, except?

Lymphatic spread. Infections of the middle ear (Otitis Media) can lead to life-threatening intracranial complications (e.g., meningitis, brain abscess) by breaching the anatomical barriers. **Why Lymphatic Spread is the Correct Answer:** The middle ear and the intracranial cavity do not share a direct or continuous lymphatic drainage system. Lymphatic drainage from the middle ear primarily flows towards the parotid, retroauricular, and deep cervical nodes. Therefore, **lymphatic spread** is not a recognized route for the intracranial spread of ear infections. **Analysis of Other Options:** * **Direct Bony Invasion (Option A):** This is the most common route, especially in chronic suppurative otitis media (CSOM) with cholesteatoma. Bone is destroyed by osteoclastic activity or pressure necrosis, allowing infection to reach the dura of the middle or posterior cranial fossa. * **Oval / Round Window (Option B):** These are pre-formed pathways. Infection can spread from the middle ear into the inner ear (labyrinthitis) via these windows, and subsequently to the meninges through the internal auditory canal or the cochlear aqueduct. * **Hematogenous Spread (Option C):** Infection can spread via retrograde thrombophlebitis. Small emissary veins connect the middle ear mucosa to the dural venous sinuses (like the sigmoid sinus), allowing bacteria to bypass bony barriers. **High-Yield Clinical Pearls for NEET-PG:** * **Most common intracranial complication of ASOM:** Meningitis. * **Most common intracranial complication of CSOM:** Extradural abscess. * **Korner’s Septum:** A persistent petrosquamosal suture that can trap infection in the mastoid, potentially leading to intracranial spread. * **Citelli’s Angle:** The sinodural angle; it is a key surgical landmark during mastoidectomy to locate the dura and sigmoid sinus.

Q: Upper limb non-suppurative otitis media in adults is due to:

Malignancy. **Explanation:** The correct answer is **Malignancy**. In adults, the presence of **unilateral** non-suppurative otitis media (also known as Otitis Media with Effusion or Serous Otitis Media) is considered a **"red flag"** sign. **1. Why Malignancy is the correct answer:** The underlying medical concept is the obstruction of the **Eustachian tube**. In adults, a tumor in the **Nasopharynx** (specifically Nasopharyngeal Carcinoma) can block the pharyngeal opening of the Eustachian tube. This leads to negative middle ear pressure, transudation of fluid, and subsequent conductive hearing loss. In any adult presenting with new-onset unilateral serous otitis media, **Nasopharyngoscopy** is mandatory to rule out a malignancy in the Fossa of Rosenmüller. **2. Why other options are incorrect:** * **Allergic Rhinitis & URTI:** While these are common causes of Eustachian tube dysfunction, they typically present with **bilateral** symptoms and are more frequently associated with pediatric populations or acute, self-limiting episodes in adults. * **Trauma:** Barotrauma can cause middle ear effusion, but it is usually associated with a clear history of pressure changes (e.g., diving or flying) and is not the primary suspicion for spontaneous non-suppurative otitis in an adult. **Clinical Pearls for NEET-PG:** * **Trotter’s Triad:** Diagnostic for Nasopharyngeal Carcinoma; includes (1) Conductive deafness (due to SOM), (2) Ipsilateral soft palate paralysis, and (3) Trigeminal neuralgia (V2 distribution). * **Grommet Insertion:** If medical management fails, a myringotomy with grommet insertion is the treatment of choice for the ear symptoms, but the primary malignancy must be addressed first. * **Rule of Thumb:** Unilateral SOM in a child = Adenoid hypertrophy; Unilateral SOM in an adult = Nasopharyngeal Carcinoma.

Q: While ear toileting, water is pushed along which wall of the external auditory canal?

Posterosuperior wall. **Explanation:** The correct technique for ear syringing (ear toileting) involves directing the stream of water along the **posterosuperior wall** of the external auditory canal (EAC). **Why Posterosuperior?** The primary objective of ear syringing is to create a pressure gradient behind the wax or debris to flush it out. When water is directed towards the posterosuperior wall, it follows the curvature of the canal, travels behind the wax bolus, and hits the tympanic membrane. The water then reflects back, pushing the wax out from behind. This specific direction is chosen because the posterosuperior wall is relatively less sensitive and provides the most direct path to the "space" behind the obstruction. **Analysis of Incorrect Options:** * **Anterosuperior/Anteroinferior walls:** Directing water anteriorly is less effective because the EAC has an anterior recess (a dip near the tympanic membrane). Water directed here tends to get trapped or push the wax deeper into the recess, making removal more difficult. * **Posteroinferior wall:** While posterior, the inferior aspect is more likely to cause the water to strike the wax head-on rather than getting behind it, potentially impacting the wax further against the eardrum. **Clinical Pearls for NEET-PG:** * **Temperature:** Water must be at body temperature (**37°C**). If it is too cold or too hot, it induces the **caloric reflex**, leading to vertigo, nystagmus, and vomiting. * **Direction of Pull:** To straighten the EAC during the procedure, pull the pinna **upwards and backwards** in adults (downwards and backwards in infants). * **Contraindications:** Never perform syringing if there is a history of **tympanic membrane perforation**, previous ear surgery, or if the patient has an active infection (Otitis Externa). * **Complications:** The most common complication is trauma to the canal wall or iatrogenic perforation of the tympanic membrane.

Question 1

In Ramsay Hunt syndrome, which cranial nerve is involved?

Accepted Answer

Facial

Answer

Trigeminal

Answer

Glossopharyngeal

Answer

Occulomotor

Question 2

A 30-year-old woman with a family history of hearing loss from her mother's side developed a hearing problem during pregnancy. The hearing loss is bilateral, slowly progressive, with bilateral tinnitus that bothers her at night. Pure tone audiometry shows conductive hearing loss with an apparent bone conduction hearing loss at 2000 Hz. What is the most likely diagnosis?

Accepted Answer

Otosclerosis

Answer

Acoustic neuroma

Answer

Otitis media with effusion

Answer

Sigmoid sinus thrombosis

Question 3

Which of the following is NOT a typical feature of malignant otitis externa?

Accepted Answer

Mitotic figures are high

Answer

Caused by Pseudomonas aeruginosa

Answer

Patients are usually elderly

Answer

Patient is immunocompromised

Question 4

In which syndrome is sensorineural hearing loss associated with abnormality of thyroxin synthesis?

Accepted Answer

Pendred syndrome

Answer

Alport syndrome

Answer

Klippel-Feil syndrome

Answer

Usher syndrome

Question 5

Which of the following is NOT an extracranial complication of chronic suppurative otitis media?

Accepted Answer

Perisinus abscess

Answer

Citelli abscess

Answer

Bezold abscess

Answer

Lüch-type abscess

Question 6

All of the following are true about Ramsay Hunt syndrome except?

Accepted Answer

Paralysis of facial muscles occurs on the contralateral side of the face.

Answer

Geniculate ganglion of the facial nerve is involved.

Answer

Vesicles are present on the tympanic membrane, external auditory canal, and tongue.

Answer

It is caused by herpes zoster.

Question 7

All of the following are included in Gradenigo's triad EXCEPT:

Accepted Answer

Palatal palsy

Answer

Abducent nerve palsy

Answer

Retro-orbital pain

Answer

Aural discharge

Question 8

Middle ear infections can spread to the brain via all of the following routes, except?

Accepted Answer

Lymphatic spread

Answer

Direct Bony Invasion

Answer

Oval / Round window

Answer

Hematogenous spread

Question 9

Upper limb non-suppurative otitis media in adults is due to:

Accepted Answer

Malignancy

Answer

Allergic rhinitis

Answer

Upper respiratory tract infection

Answer

Trauma

Question 10

While ear toileting, water is pushed along which wall of the external auditory canal?

Accepted Answer

Posterosuperior wall

Answer

Anterosuperior wall

Answer

Anteroinferior wall

Answer

Posteroinferior wall

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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