Diseases of the Ear Practice Questions

Q: Which of the following best describes glue ear?

It is typically painless.. **Explanation:** **Glue ear**, medically known as **Otitis Media with Effusion (OME)**, is characterized by the accumulation of non-purulent, mucoid, or serous fluid in the middle ear cleft without signs of acute infection. 1. **Why Option B is correct:** Unlike Acute Otitis Media (AOM), glue ear is **typically painless**. The primary symptom is **conductive hearing loss** (the most common cause of hearing loss in children). Because there is no active bacterial suppuration or pressure from pus, patients do not experience otalgia or fever. 2. **Why the other options are incorrect:** * **Option A:** Pain is a hallmark of Acute Otitis Media or Otitis Externa, not OME. * **Option C:** Radical mastoidectomy is an aggressive surgery for cholesteatoma. The primary surgical treatment for glue ear is **Myringotomy with Grommet (ventilation tube) insertion**, often combined with an adenoidectomy if indicated. * **Option D:** Sodium fluoride is used to stabilize active bony resorption in **Otosclerosis** (Schwartze sign), not for middle ear effusions. **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Often associated with **Eustachian tube dysfunction** or adenoid hypertrophy. * **Diagnosis:** The gold standard for diagnosis is **Tympanometry**, which typically shows a **Type B (flat) curve**. * **Otoscopy:** Findings include a dull, retracted tympanic membrane with restricted mobility (assessed via pneumatic otoscopy). An "amber-colored" drum or air-fluid bubbles may be seen. * **Management:** Initial management is usually observation (watchful waiting for 3 months) as many cases resolve spontaneously. If persistent, Myringotomy is performed in the **antero-inferior quadrant**.

Q: An axial CT scan of the mastoid is shown below. Which type of pathological mastoid is depicted among the given options?

Sclerotic mastoid. ***Sclerotic mastoid*** - Characterized by **dense, opaque bone** with **absent air cells** on CT, indicating chronic inflammation and bone sclerosis. - Associated with **chronic otitis media** and represents pathological changes due to repeated infections. *Pneumatized mastoid* - Shows **well-aerated air cells** with **thin bony septa** on CT, representing normal healthy mastoid anatomy. - Appears as **dark/black areas** on CT due to air content, which is the opposite of what's shown. *Diploeic mastoid* - Contains **bone marrow spaces** instead of air cells, appearing as **mixed density** on CT. - Shows **trabecular bone pattern** with marrow fat, not the solid dense appearance of sclerosis. *Atrophic mastoid* - Features **enlarged air spaces** with **thin walls** due to bone resorption over time. - Appears as **large, confluent air cavities** on CT, contrasting with the solid bone density seen here.

Q: Which nerve is responsible for referred pain in the ear?

Glossopharyngeal. ### Explanation The sensory innervation of the ear is complex, involving multiple cranial and spinal nerves. This complexity is the basis for **referred otalgia** (ear pain originating from a non-otologic source). **Why Glossopharyngeal (CN IX) is Correct:** The Glossopharyngeal nerve supplies sensory innervation to the middle ear cleft via the **Jacobson’s nerve** (tympanic branch). It also provides sensation to the oropharynx, base of the tongue, and tonsillar fossa. Due to this shared pathway, pathologies in the throat—most commonly **post-tonsillectomy pain, peritonsillar abscess (Quinsy), or glossopharyngeal neuralgia**—are perceived as pain in the ear. **Analysis of Incorrect Options:** * **A. Trochlear (CN IV):** A pure motor nerve supplying the superior oblique muscle of the eye. It has no sensory component or connection to the ear. * **B. Olfactory (CN I):** A special sensory nerve responsible for the sense of smell. It does not carry general somatic sensation. * **D. Abducent (CN VI):** A pure motor nerve supplying the lateral rectus muscle of the eye. It is not involved in sensory pathways. **Clinical Pearls for NEET-PG:** 1. **Nerves causing referred otalgia:** * **CN V3 (Auriculotemporal n.):** Pain from TMJ disorders or dental caries. * **CN IX (Jacobson’s n.):** Pain from the oropharynx/tonsils. * **CN X (Arnold’s n.):** Pain from the larynx or pyriform fossa (e.g., Laryngeal Malignancy). * **C2, C3 (Greater Auricular n.):** Pain from cervical spine issues. 2. **Hilger’s Law:** Any nerve that supplies a muscle also supplies the joint moved by the muscle and the skin over the insertion. 3. **High-Yield Fact:** If a patient presents with ear pain but a **normal-looking tympanic membrane**, always examine the throat and larynx to rule out occult malignancy.

Q: What is the treatment of choice for unsafe CSOM with cholesteatoma and sensorineural deafness?

Modified radical mastoidectomy. **Explanation:** The primary goal in the management of **Unsafe Chronic Suppurative Otitis Media (CSOM)** with cholesteatoma is to create a "permanent, safe, and dry ear" by removing all disease. **1. Why Modified Radical Mastoidectomy (MRM) is the Correct Choice:** MRM is the standard treatment for unsafe CSOM. It involves removing the disease (cholesteatoma/granulations) from the attic and antrum while **preserving the remnants of the tympanic membrane and ossicles** (if present). Even in the presence of sensorineural deafness, MRM is preferred over Radical Mastoidectomy because it maintains the anatomical integrity of the middle ear and allows for future hearing rehabilitation (like a bone-anchored hearing aid) while ensuring the ear is safe. **2. Why other options are incorrect:** * **Simple Mastoidectomy:** This is used for **Acute Mastoiditis** or ASOM complications. It removes air cells without disturbing the posterior meatal wall or middle ear, making it inadequate for cholesteatoma. * **Radical Mastoidectomy:** This involves the total removal of the tympanic membrane, ossicles (except stapes), and closure of the Eustachian tube, converting the middle ear and mastoid into a single cavity. It is reserved for specific cases like **malignancy** or **unreconstructable Eustachian tube dysfunction**, not routine unsafe CSOM. * **Tympanoplasty:** This is the treatment of choice for **Safe (Tubotympanic) CSOM**. It focuses on reconstructing the hearing mechanism but does not address the mastoid disease seen in unsafe CSOM. **High-Yield Clinical Pearls for NEET-PG:** * **Goal Hierarchy in Unsafe CSOM:** 1. Safety (Remove disease) → 2. Dry Ear → 3. Hearing Preservation. * **Canal Wall Down (CWD) Procedure:** MRM is a CWD procedure where the posterior meatal wall is removed to exteriorize the disease. * **Cholesteatoma Hallmark:** Bone erosion due to osteoclast activation and enzymes like acid phosphatase.

Q: Referred otalgia can be due to which of the following?

All of the above. **Explanation:** Referred otalgia occurs when pain is perceived in the ear due to a disease process in a remote area that shares the same sensory nerve supply. The ear has a complex nerve supply involving the **Trigeminal (V3), Facial (VII), Glossopharyngeal (IX), Vagus (X), and Cervical nerves (C2, C3).** * **Carcinoma of the Larynx (Option A):** The larynx is supplied by the **Vagus nerve** (Superior and Recurrent laryngeal nerves). Pain is referred to the ear via the **Arnold’s nerve** (Auricular branch of the Vagus), which supplies the external auditory canal. * **Carcinoma of the Oral Cavity (Option B):** The anterior two-thirds of the tongue and the floor of the mouth are supplied by the **Lingual nerve (V3)**. Pain is referred via the **Auriculotemporal nerve** (another branch of V3), which supplies the skin of the pinna and temple. * **Carcinoma of the Tongue (Option C):** The posterior one-third of the tongue and the base of the tongue are supplied by the **Glossopharyngeal nerve**. Pain is referred via the **Jacobson’s nerve** (Tympanic branch of IX), which supplies the middle ear mucosa. Since all three regions share nerve pathways with the ear, they all cause referred otalgia. Therefore, **Option D** is correct. **High-Yield Clinical Pearls for NEET-PG:** 1. **Jacobson’s Nerve (IX):** Most common cause of referred otalgia following **Tonsillectomy**. 2. **Arnold’s Nerve (X):** Responsible for the **Ear-Cough Reflex** (coughing during ear syringing). 3. **Rule of Thumb:** In an elderly patient with a normal ear examination complaining of earache, always perform a thorough endoscopic examination of the upper aerodigestive tract to rule out malignancy.

Q: A 5-year-old child has had eight episodes of acute otitis media in 6 months and has difficulty resolving the effusions between infections. What is the most effective management strategy?

Adenoidectomy. **Explanation:** The core issue in this clinical scenario is **Recurrent Acute Otitis Media (RAOM)** with persistent **Otitis Media with Effusion (OME)**. The frequency of infections (8 episodes in 6 months) and the failure to resolve effusions suggest a chronic underlying mechanical or infectious focus. **Why Adenoidectomy is the Correct Answer:** The adenoids play a dual role in the pathogenesis of recurrent ear infections. First, **adenoid hypertrophy** can mechanically obstruct the Eustachian tube orifice, leading to negative middle ear pressure and effusion. Second, and more importantly, the adenoids act as a **bacterial reservoir (biofilm)** for otopathogens like *S. pneumoniae* and *H. influenzae*. Removing the adenoids eliminates this source of infection and improves Eustachian tube function, making it the most effective long-term management strategy for refractory cases. **Analysis of Incorrect Options:** * **Option A:** Treating each infection reactively fails to address the anatomical/pathological predisposition, leading to further recurrence and potential hearing loss. * **Option B:** While ventilating tubes (myringotomy) help drain fluid and equalize pressure, they do not address the source of infection (the adenoids). In children over 4 years with recurrent issues, adenoidectomy is often preferred or combined with tubes. * **Option C:** Prophylactic antibiotics are no longer recommended as a primary strategy due to the high risk of antibiotic resistance and limited long-term efficacy compared to surgical intervention. **Clinical Pearls for NEET-PG:** * **Definition of RAOM:** $\ge$ 3 episodes in 6 months or $\ge$ 4 episodes in 12 months. * **Indications for Adenoidectomy:** Recurrent OM (especially if >4 years old), chronic sinusitis, and obstructive sleep apnea (OSA). * **Most common organism in AOM:** *Streptococcus pneumoniae*. * **First-line Antibiotic:** High-dose Amoxicillin.

Q: Mastoid infection which erodes through the outer cortex of bone results in what?

Sub-periosteal abscess. ### Explanation **1. Why Sub-periosteal Abscess is Correct:** The mastoid bone is bounded laterally by the **outer cortex** and medially by the inner table (which separates it from the brain). In acute coalescent mastoiditis, pus accumulates under pressure within the mastoid air cells. When this infection erodes through the **outer cortex**, the pus collects between the bone and the overlying periosteum, forming a **sub-periosteal abscess**. The most common site for this is the "Post-auricular abscess," which displaces the pinna forwards, downwards, and outwards. **2. Why the Other Options are Incorrect:** * **B. Epidural Abscess:** This occurs when the infection erodes through the **inner table** (posterior or middle cranial fossa plate) rather than the outer cortex. It is an intracranial complication where pus collects between the bone and the dura mater. * **C. Perichondritis:** This is an infection of the cartilage of the pinna, usually following trauma or infected hematoma. It does not originate from the mastoid bone cortex. * **D. Lateral Sinus Thrombosis:** This is a vascular complication caused by the erosion of the **posterior fossa plate** (inner table), leading to inflammation and thrombus formation within the sigmoid/lateral sinus. **3. NEET-PG High-Yield Pearls:** * **Bezold’s Abscess:** Pus erodes through the mastoid tip into the **sternocleidomastoid** sheath (presents as a neck swelling). * **Luc’s Abscess:** Pus erodes through the **meatal wall** into the external auditory canal. * **Citelli’s Abscess:** Pus erodes through the mastoid tip into the **digastric fossa**. * **Zygomatic Abscess:** Pus erodes into the root of the zygoma, causing swelling over the cheek. * **Radiology:** The "Clouding of mastoid air cells" with loss of bony trabeculae (coalescence) is the hallmark of surgical mastoiditis on CT.

Q: A patient with facial nerve paralysis suffers from inability to dampen loud noises due to denervation of which muscle?

Stapedius. **Explanation:** The correct answer is **Stapedius**. This muscle is responsible for the **acoustic reflex** (stapedial reflex), which protects the inner ear from acoustic trauma. **1. Why Stapedius is correct:** The stapedius muscle is the smallest skeletal muscle in the body, located in the middle ear. It is innervated by the **nerve to stapedius**, a branch of the **Facial Nerve (CN VII)**. When exposed to loud sounds (>70-90 dB), the stapedius contracts, pulling the stapes bone away from the oval window. This increases the stiffness of the ossicular chain, dampening the vibrations transmitted to the cochlea. In facial nerve paralysis (e.g., Bell’s palsy), denervation of this muscle leads to **hyperacusis**—a condition where normal sounds appear abnormally loud and painful. **2. Why other options are incorrect:** * **Posterior belly of digastric & Stylohyoid:** While both are supplied by the facial nerve, they are muscles of the neck involved in swallowing and stabilizing the hyoid bone; they have no role in hearing. * **Tensor tympani:** This muscle also dampens sound by tensing the tympanic membrane, but it is innervated by the **Mandibular nerve (V3)**, a branch of the Trigeminal nerve. It would not be affected by a primary facial nerve lesion. **Clinical Pearls for NEET-PG:** * **Hyperacusis** indicates a facial nerve lesion **proximal** to the nerve to stapedius (in the vertical segment of the bony fallopian canal). * The **Stapedial Reflex** is an objective test used in topodiagnostic studies to locate the site of a facial nerve lesion. * The stapedius muscle is derived from the **2nd branchial arch**, whereas the tensor tympani is derived from the **1st branchial arch**.

Q: Which of the following is NOT true about hearing loss in otosclerosis?

Common in males older than 40 years. **Explanation:** Otosclerosis is a primary metabolic bone disease of the otic capsule characterized by the replacement of normal bone with vascular spongy bone, leading to stapedial fixation and conductive hearing loss. **Why Option A is the correct answer (False Statement):** Otosclerosis typically presents in **young adults (20–30 years)** and is significantly more common in **females** (Ratio 2:1). The condition is often exacerbated by hormonal changes such as pregnancy or puberty. Therefore, the statement that it is common in males older than 40 is epidemiologically incorrect. **Analysis of other options:** * **Option B (Associated with vertigo):** While primarily a hearing disorder, "Cochlear Otosclerosis" or "Otospongiosis" can involve the vestibular system, leading to balance disturbances or vertigo in a subset of patients. * **Option C (Paracusis Willisii):** This is a classic clinical feature where the patient hears better in noisy environments. This occurs because background noise causes others to speak louder, and the patient’s conductive loss filters out the low-frequency ambient noise. * **Option D (Schwartz sign):** Also known as the "Flamingo Flush," this is a reddish hue seen through the tympanic membrane due to increased vascularity of the promontory during the active phase of the disease (Otospongiosis). **NEET-PG High-Yield Pearls:** * **Carhart’s Notch:** A characteristic dip in the bone conduction audiogram at **2000 Hz**. * **Gelle’s Test:** Negative (indicates stapes fixation). * **Tympanometry:** Typically shows an **As type** curve (reduced compliance). * **Treatment of Choice:** Stapedotomy (most common) or Stapedectomy. * **Medical Management:** Sodium Fluoride (used to mature active foci).

Question 1

Which of the following best describes glue ear?

Accepted Answer

It is typically painless.

Answer

It is typically painful.

Answer

Radical mastoidectomy is the primary treatment.

Answer

Sodium fluoride is a useful treatment.

Question 2

An axial CT scan of the mastoid is shown below. Which type of pathological mastoid is depicted among the given options?

Accepted Answer

Sclerotic mastoid

Answer

Pneumatized mastoid

Answer

Diploeic mastoid

Answer

Atrophic mastoid

Question 3

Which nerve is responsible for referred pain in the ear?

Accepted Answer

Glossopharyngeal

Answer

Trochlear

Answer

Olfactory

Answer

Abducent

Question 4

What is the treatment of choice for unsafe CSOM with cholesteatoma and sensorineural deafness?

Accepted Answer

Modified radical mastoidectomy

Answer

Simple mastoidectomy

Answer

Radical mastoidectomy

Answer

Tympanoplasty

Question 5

Referred otalgia can be due to which of the following?

Accepted Answer

All of the above

Answer

Carcinoma of the larynx

Answer

Carcinoma of the oral cavity

Answer

Carcinoma of the tongue

Question 6

A 5-year-old child has had eight episodes of acute otitis media in 6 months and has difficulty resolving the effusions between infections. What is the most effective management strategy?

Accepted Answer

Adenoidectomy

Answer

Treating each infection as it arises

Answer

Placement of ventilating tubes

Answer

Prescribing prophylactic antibiotics for 6 months

Question 7

Mastoid infection which erodes through the outer cortex of bone results in what?

Accepted Answer

Sub-periosteal abscess

Answer

Epidural abscess

Answer

Perichondritis

Answer

Lateral sinus thrombosis

Question 8

A patient with facial nerve paralysis suffers from inability to dampen loud noises due to denervation of which muscle?

Accepted Answer

Stapedius

Answer

Posterior belly of digastric

Answer

Tensor tympani

Answer

Stylohyoid Muscle

Question 9

Which of the following is NOT true about hearing loss in otosclerosis?

Accepted Answer

Common in males older than 40 years

Answer

Associated with vertigo

Answer

Characterized by Paracusis Willisii

Answer

May present with Schwartz sign

Question 10

What is the treatment of choice in central perforation?

Accepted Answer

Tympanoplasty

Answer

Modified mastoidectomy

Answer

Myringoplasty

Answer

Conservative management

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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