Diseases of the Ear Practice Questions

Q: A 10-year-old child presents with a preauricular sinus. There is no discharge or inflammation. A similar sinus was also observed in his mother. What is the most appropriate line of management?

Education and observation. ### Explanation **1. Why "Education and Observation" is correct:** A preauricular sinus is a common congenital malformation caused by the incomplete fusion of the **six auricular hillocks of His** (specifically between the 1st and 2nd branchial arches). In an **asymptomatic** patient—one with no history of discharge, abscess formation, or recurrent inflammation—no surgical intervention is required. The management involves educating the patient/parents about the condition and observing for signs of infection. Surgery (Surgical excision or the **Szymanowski/Prasad technique**) is reserved strictly for symptomatic cases. **2. Why the other options are incorrect:** * **Option B (Sinogram):** Injecting dye into a quiescent sinus is unnecessary and carries a risk of introducing infection into a previously sterile tract. * **Option C & D (CT/MRI):** Imaging is not indicated for a simple preauricular sinus. Diagnosis is clinical. Imaging is only considered if there is suspicion of a complex branchial cleft anomaly or if the sinus is associated with other syndromic features (e.g., Branchio-Oto-Renal syndrome). **3. Clinical Pearls for NEET-PG:** * **Embryology:** Most commonly arises from the failure of fusion of the first two branchial arches. * **Location:** Usually located at the anterior margin of the ascending limb of the helix. * **Genetics:** Often follows an autosomal dominant pattern with incomplete penetrance (explaining the presence in the mother). * **Surgical Note:** If surgery is performed for recurrent infection, the entire tract must be excised, often including a small portion of the helical cartilage perichondrium (**Supra-auricular approach**) to minimize the high recurrence rate. * **Syndromic Association:** Always check for hearing loss or renal abnormalities to rule out **Branchio-Oto-Renal (BOR) Syndrome**.

Q: A child presents with barotrauma pain without middle ear inflammation. What is the management?

Supportive care. ### Explanation **Core Concept: Understanding Otic Barotrauma** Otic barotrauma occurs due to a pressure difference between the middle ear and the external environment, typically during rapid altitude changes (diving or flying). This results from **Eustachian tube dysfunction**. In the absence of middle ear inflammation, infection, or significant hemotympanum, the condition is usually self-limiting. **Why Supportive Care is Correct:** The primary goal in uncomplicated barotrauma is to restore middle ear pressure. **Supportive care** is the first-line management. This includes: * **Decongestants** (nasal or systemic) to reduce edema around the Eustachian tube orifice. * **Autoinflation maneuvers** (e.g., Valsalva maneuver) to force air into the middle ear. * **Analgesics** (NSAIDs) for pain relief. Most cases resolve spontaneously once the pressure equilibrates. **Why Other Options are Incorrect:** * **A. Antibiotics:** These are only indicated if there is secondary bacterial infection (Otitis Media). In this scenario, there is no inflammation or infection. * **B. Myringotomy:** This is a surgical procedure to release fluid or pressure. It is reserved for severe, refractory cases or when there is intense pain and significant middle ear effusion that fails medical therapy. * **C. Grommet Insertion:** This is a long-term solution for chronic Eustachian tube dysfunction or recurrent Serous Otitis Media. It is not indicated for an acute, uncomplicated episode of barotrauma. **High-Yield Clinical Pearls for NEET-PG:** * **Boyle’s Law** explains barotrauma: Volume of gas is inversely proportional to pressure. * **Teed Classification** is used to grade the severity of middle ear barotrauma (Grade 0-5). * **Prevention:** Advise patients to chew gum, swallow, or use the Valsalva maneuver during aircraft descent. * **Diving:** Barotrauma occurs most commonly during **descent** (negative middle ear pressure).

Q: Referred ear pain may travel through all nerves except which one?

Abducens nerve. **Explanation:** Referred otalgia (ear pain) occurs because the sensory innervation of the ear is complex and shared with various other structures in the head and neck. When a distant organ supplied by the same nerve is diseased, the brain misinterprets the pain as originating from the ear. **Why Abducens Nerve (CN VI) is the correct answer:** The **Abducens nerve** is a purely **motor nerve** responsible for the innervation of the Lateral Rectus muscle of the eye. It carries no sensory fibers and does not contribute to the nerve supply of the external or middle ear. Therefore, it cannot mediate referred pain to the ear. **Why the other options are incorrect:** * **Trigeminal Nerve (CN V):** The mandibular branch (Auriculotemporal nerve) supplies the pinna and external canal. Pain from the **teeth, TMJ, or anterior tongue** is referred here. * **Glossopharyngeal Nerve (CN IX):** Via Jacobson’s nerve, it supplies the middle ear cleft. This is a classic route for pain from the **tonsils (post-tonsillectomy)** or base of the tongue. * **Vagus Nerve (CN X):** The auricular branch (Arnold’s nerve) supplies the canal. Pain from the **larynx, pharynx, or esophagus** (e.g., GERD or malignancy) is referred via this route. **Clinical Pearls for NEET-PG:** 1. **Hilger’s Law:** Any nerve that provides sensory innervation to the ear can cause referred otalgia. 2. **Cervical Nerves (C2, C3):** The Greater Auricular and Lesser Occipital nerves also cause referred pain from the cervical spine. 3. **High-Yield Rule:** In an elderly smoker with a normal ear exam but persistent ear pain, always rule out **Malignancy of the Upper Aerodigestive Tract** (referred via CN IX or X).

Q: All of the following diseases have consistent symptom of tinnitus, except?

Mastoiditis. ### Explanation The correct answer is **Mastoiditis**. **1. Why Mastoiditis is the correct answer:** Mastoiditis is an acute inflammatory process of the mastoid air cells, usually occurring as a complication of Acute Otitis Media (AOM). Its clinical hallmark is the **"classic triad"** of ear pain (otalgia), fever, and post-auricular tenderness/swelling with protrusion of the pinna. While hearing loss may occur due to fluid in the middle ear, **tinnitus is not a consistent or defining symptom** of this acute bacterial infection. The focus is on systemic toxicity and local suppuration rather than cochlear or neural irritation. **2. Why the other options are incorrect:** * **Meniere’s Disease:** Characterized by the classic triad of episodic vertigo, sensorineural hearing loss, and **low-pitched roaring tinnitus**. Tinnitus is a core diagnostic criterion. * **Otosclerosis:** This condition involves abnormal bone remodeling of the otic capsule. It consistently presents with progressive conductive hearing loss and **tinnitus** (often described as "seashell" or pulsatile in some variants). * **CSOM (Chronic Suppurative Otitis Media):** Chronic inflammation of the middle ear and mastoid often presents with persistent ear discharge, hearing loss, and **tinnitus** due to the effect of inflammatory mediators on the inner ear (secondary cochlear involvement). ### High-Yield Clinical Pearls for NEET-PG: * **Pulsatile Tinnitus:** Think of Glomus Jugulare, Glomus Tympanicum, or vascular anomalies. * **Clicking Tinnitus:** Think of Palatal Myoclonus or Patulous Eustachian Tube. * **Schwartze Sign (Flamingo Flush):** Seen in active Otosclerosis (increased vascularity over the promontory). * **Mastoiditis Complication:** The most common extracranial complication is a **Subperiosteal abscess** (Bezold’s or Citelli’s abscess).

Q: A patient sustained a head injury and subsequently developed conductive deafness. Examination revealed a normal and mobile tympanic membrane with increased compliance on impedance audiometry. What is the likely diagnosis?

Distortion of ossicular chain. ### Explanation The patient presents with **conductive hearing loss (CHL)** following head trauma, a normal/mobile tympanic membrane (TM), and **increased compliance** on impedance audiometry. This triad is classic for **ossicular chain disruption (distortion)**. **1. Why "Distortion of ossicular chain" is correct:** In head injuries (especially longitudinal temporal bone fractures), the sudden impact can cause the ossicles to disarticulate. The most common site is the incudostapedial joint. Because the ossicular chain is no longer intact, the TM loses its "loading" or resistance. This results in an **Ad (deep) type tympanogram**, characterized by abnormally high compliance (hypermobility) because the TM moves too easily without the weight of the ossicles behind it. **2. Why the other options are incorrect:** * **Hemotympanum:** This involves blood in the middle ear. It would present with a bulging, blue/dark TM and **decreased compliance** (Type B tympanogram) due to fluid behind the drum. * **Tympanosclerosis:** This involves hyalinization and calcification of the TM or middle ear mucosa. It increases the stiffness of the system, leading to **decreased compliance** (Type As tympanogram). * **Otosclerosis:** This is a metabolic bone disease causing stapes fixation. It results in a stiff ossicular chain, leading to a **Type As tympanogram** (low compliance), not increased compliance. **Clinical Pearls for NEET-PG:** * **Most common ossicular dislocation:** Incudostapedial joint (due to the long process of the incus having a tenuous blood supply and weak ligamentous support). * **Second most common:** Dislocation of the incus itself. * **Tympanometry Tip:** * **Type Ad:** Disarticulation or thin/flaccid TM (High compliance). * **Type As:** Otosclerosis or Tympanosclerosis (Low compliance/Stiffness). * **Type B:** Otitis Media with Effusion or Hemotympanum (Flat/Fluid).

Q: Which of the following is true about Pendred syndrome?

All of the above. **Explanation:** **Pendred Syndrome** is an autosomal recessive disorder caused by a mutation in the **SLC26A4 gene** on chromosome 7, which encodes the protein **pendrin**. Pendrin is an ion exchanger found in the inner ear and the thyroid gland. 1. **Thyroid Manifestations (Options A & B):** The defect in pendrin leads to impaired organification of iodine (positive **Perchlorate discharge test**). This results in a state of subclinical or overt hypothyroidism, leading to a compensatory increase in TSH. This chronic stimulation causes the thyroid to enlarge, initially presenting as a **diffuse colloid goiter**, which over time progresses into a **multinodular goiter**. 2. **Neurological Manifestations (Option C):** The syndrome is characterized by congenital **sensorineural hearing loss (SNHL)**. If the associated hypothyroidism is severe and untreated during the neonatal period, it can lead to cretinism and significant **mental retardation**. 3. **Inner Ear Findings:** Radiologically, it is classically associated with **Mondini dysplasia** (incomplete partition of the cochlea) and an **enlarged vestibular aqueduct (EVA)**. **Why "All of the above" is correct:** Pendred syndrome is a multisystem disorder. While the goiter may start as diffuse, it frequently becomes nodular, and the metabolic impact of thyroid dysfunction can lead to cognitive impairment. **High-Yield Clinical Pearls for NEET-PG:** * **Most common** cause of syndromic deafness. * **Diagnostic Test:** Perchlorate discharge test (shows >10-15% discharge of iodine). * **Imaging Gold Standard:** CT/MRI showing Enlarged Vestibular Aqueduct (EVA). * **Inheritance:** Autosomal Recessive.

Q: All of the following will produce conductive hearing loss, EXCEPT?

Endolymphatic hydrops. **Explanation:** The core concept in this question is distinguishing between **Conductive Hearing Loss (CHL)**, which results from pathology in the external or middle ear, and **Sensorineural Hearing Loss (SNHL)**, which arises from disorders of the inner ear (cochlea) or the vestibulocochlear nerve (CN VIII). **Why Endolymphatic Hydrops is the correct answer:** Endolymphatic hydrops (the underlying pathology of **Meniere’s disease**) is a disorder of the inner ear characterized by increased pressure of the endolymph. Since it affects the cochlea, it produces a **Sensorineural Hearing Loss**, typically fluctuating and involving lower frequencies in the early stages. It does not interfere with the mechanical conduction of sound through the middle ear. **Analysis of incorrect options (Causes of CHL):** * **Otosclerosis:** A condition involving bony overgrowth of the stapes footplate, which prevents it from vibrating against the oval window, leading to CHL. * **Serous Otitis Media:** The presence of non-purulent fluid in the middle ear space creates a physical barrier to sound transmission, causing CHL. * **Suppurative Otitis Media (ASOM/CSOM):** Inflammation, pus accumulation, or tympanic membrane perforation in the middle ear disrupts the ossicular chain's efficiency, resulting in CHL. **Clinical Pearls for NEET-PG:** * **Meniere’s Disease Triad:** Vertigo, Tinnitus, and Fluctuating SNHL. * **Carhart’s Notch:** A characteristic dip in bone conduction at **2000 Hz** seen in Otosclerosis (a "pseudo-SNHL" finding in a CHL case). * **Gelle’s Test:** Used to differentiate Otosclerosis (Negative) from other causes of CHL. * **Schwartz Sign:** A flamingo-pink flush on the promontory seen in active otosclerosis.

Q: Picket fence fever is typically seen in which of the following conditions?

Lateral sinus thrombosis. **Explanation:** **Lateral Sinus Thrombosis (LST)**, also known as Sigmoid Sinus Thrombosis, is a known complication of chronic suppurative otitis media (CSOM). The characteristic **"Picket Fence" fever** (also called Hectic Tremor) occurs due to the periodic release of septic emboli from the infected thrombus into the systemic circulation. This results in sudden, high-grade fever spikes with chills and rigors, followed by rapid defervescence (profuse sweating), mimicking the sharp peaks of a picket fence on a temperature chart. **Analysis of Options:** * **Petrositis (Option A):** Characterized by **Gradenigo’s Syndrome**, which consists of a clinical triad: persistent otorrhea, retro-orbital pain (trigeminal nerve involvement), and diplopia due to 6th cranial nerve palsy. It does not typically present with picket fence fever. * **Meningitis (Option B):** Presents with high-grade continuous fever, neck rigidity, and positive Kernig’s/Brudzinski’s signs. The fever pattern is usually sustained rather than intermittent spikes. * **Temporal Lobe Abscess (Option D):** Often presents with features of raised intracranial pressure (headache, vomiting, papilledema) and focal neurological deficits (e.g., nominal aphasia). The fever is often low-grade or even subnormal in the manifest stage. **Clinical Pearls for NEET-PG:** * **Griesinger’s Sign:** Edema over the mastoid process due to thrombosis of the mastoid emissary vein (Pathognomonic for LST). * **Tobey-Ayer Test:** Used during manometry to detect lateral sinus obstruction (compression of the internal jugular vein). * **Crowe-Beck Test:** Engorgement of retinal veins upon compression of the healthy internal jugular vein. * **Investigation of Choice:** Contrast-enhanced MRI/MRV (shows the "Empty Delta Sign").

Question 1

A 10-year-old child presents with a preauricular sinus. There is no discharge or inflammation. A similar sinus was also observed in his mother. What is the most appropriate line of management?

Accepted Answer

Education and observation

Answer

Order a sinogram after injection of a radiopaque dye

Answer

Order a CT scan in the axial plane

Answer

Order an MRI to exclude a cyst

Question 2

A child presents with barotrauma pain without middle ear inflammation. What is the management?

Accepted Answer

Supportive care

Answer

Antibiotics

Answer

Myringotomy

Answer

Grommet insertion

Question 3

Through which of the following routes can infection of the central nervous system spread?

Accepted Answer

Cochlear aqueduct

Answer

Endolymphatic sac

Answer

Vestibular aqueduct

Answer

Hyle fissure

Question 4

Referred ear pain may travel through all nerves except which one?

Accepted Answer

Abducens nerve

Answer

Trigeminal nerve

Answer

Glossopharyngeal nerve

Answer

Vagus nerve

Question 5

All of the following diseases have consistent symptom of tinnitus, except?

Accepted Answer

Mastoiditis

Answer

Meniere's disease

Answer

CSOM

Answer

Otosclerosis

Question 6

A patient presents with high fever, signs of raised intracranial pressure, and a past history of chronic otitis media. What is the most likely diagnosis?

Accepted Answer

Brain abscess

Answer

Pyogenic meningitis

Answer

Acute subarachnoid hemorrhage

Answer

Acute osteomyelitis of skull bone

Question 7

A patient sustained a head injury and subsequently developed conductive deafness. Examination revealed a normal and mobile tympanic membrane with increased compliance on impedance audiometry. What is the likely diagnosis?

Accepted Answer

Distortion of ossicular chain

Answer

Hemotympanum

Answer

Tympanosclerosis

Answer

Otosclerosis

Question 8

Which of the following is true about Pendred syndrome?

Accepted Answer

All of the above

Answer

Diffuse colloid goiter

Answer

Nodular goiter

Answer

Mental retardation

Question 9

All of the following will produce conductive hearing loss, EXCEPT?

Accepted Answer

Endolymphatic hydrops

Answer

Otosclerosis

Answer

Serous otitis media

Answer

Suppurative otitis media

Question 10

Picket fence fever is typically seen in which of the following conditions?

Accepted Answer

Lateral sinus thrombosis

Answer

Petrositis

Answer

Meningitis

Answer

Temporal lobe abscess

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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