Diseases of the Ear Practice Questions

Q: What is the commonest cause of Eustachian tube diseases?

Adenoids. **Explanation:** The **Eustachian tube (ET)** serves three primary functions: ventilation, protection, and drainage of the middle ear. In the pediatric population, the ET is shorter, wider, and more horizontal, making it highly susceptible to dysfunction. **Why Adenoids are the correct answer:** Adenoid hypertrophy is the **most common cause** of Eustachian tube dysfunction. It causes obstruction through two mechanisms: 1. **Mechanical Obstruction:** Enlarged adenoid tissue directly blocks the pharyngeal opening of the ET in the nasopharynx. 2. **Infective Source:** Adenoids act as a reservoir for pathogenic bacteria (forming a biofilm), leading to ascending infections and inflammatory edema of the ET lining (salpingitis). This is the leading precursor to Otitis Media with Effusion (OME). **Analysis of Incorrect Options:** * **B. Sinusitis:** While chronic sinusitis can cause secondary inflammation of the nasopharynx, it is less frequently the primary anatomical cause compared to adenoids. * **C. Otitis Media:** This is generally a **consequence** of ET disease, not the primary cause. ET dysfunction leads to negative middle ear pressure, resulting in Otitis Media. * **D. Pharyngitis:** General pharyngeal infections rarely cause chronic ET disease unless the infection specifically involves the nasopharynx (nasopharyngitis). **High-Yield Clinical Pearls for NEET-PG:** * **Gelle’s Test:** Used to check ET patency and ossicular chain mobility. * **Toynbee Maneuver:** Swallowing with the nose pinched; it is a more physiological way to test ET function than the Valsalva maneuver. * **Unilateral Serous Otitis Media in an adult:** Always rule out **Nasopharyngeal Carcinoma (NPC)** obstructing the ET (Fossa of Rosenmüller). * **Patulous ET:** Often seen after rapid weight loss; the patient complains of **autophony** (hearing their own voice).

Q: Referred pain in the ear can be caused by all of the following EXCEPT:

Furunculosis. **Explanation:** The ear has a complex sensory nerve supply involving the **Trigeminal (V3)**, **Facial (VII)**, **Glossopharyngeal (IX)**, **Vagus (X)**, and **Greater Auricular (C2, C3)** nerves. **Referred otalgia** occurs when a disease process in a distant site shares a common neural pathway with the ear. **Why Furunculosis is the correct answer:** Furunculosis is a localized infection of the hair follicle in the outer cartilaginous part of the external auditory canal (usually caused by *Staphylococcus aureus*). Because the pathology is located **within the ear itself**, the pain is classified as **Primary Otalgia**, not referred pain. **Analysis of Incorrect Options (Causes of Referred Otalgia):** * **Oral cavity tumors:** Pain is referred via the **Lingual nerve (branch of V3)** or the **Glossopharyngeal nerve (IX)**. * **Temporomandibular joint (TMJ) problems:** The TMJ is supplied by the **Auriculotemporal nerve (branch of V3)**, which also supplies the external ear and tympanic membrane. This is a very common cause of referred earache. * **Teething:** Dental issues, including teething or impacted molars, refer pain to the ear via the **Alveolar nerves (branches of V3)**. **High-Yield Clinical Pearls for NEET-PG:** * **Nerve Supply Summary:** * **V3 (Auriculotemporal):** TMJ, teeth, anterior pinna. * **IX (Jacobson’s nerve):** Oropharynx, tonsils, base of tongue (Common after tonsillectomy). * **X (Arnold’s nerve):** Laryngopharynx, esophagus, vagal stimulation can cause a cough reflex during ear cleaning. * **Rule of Thumb:** In an elderly patient with a normal-looking ear complaining of severe earache, always rule out a malignancy in the upper aerodigestive tract (referred via IX or X).

Q: In otitis media, how is Weber's test typically lateralized?

Lateralized to the poorer ear. ### Explanation **Concept:** Otitis media (whether acute or serous) causes **Conductive Hearing Loss (CHL)** due to fluid or pressure in the middle ear interfering with the ossicular conduction of sound. In **Weber’s test**, a vibrating tuning fork (512 Hz) is placed on the midline of the skull. In CHL, the sound is **lateralized to the poorer ear** (the ear with the conductive deficit). This occurs because the "masking effect" of ambient room noise is reduced in the affected ear, and there is an increase in bone conduction sensitivity (the Stenger phenomenon). Essentially, the cochlea in the diseased ear is normal but is better able to perceive bone-conducted sound because it isn't competing with external environmental noise. **Analysis of Options:** * **Option B (Correct):** In CHL (as seen in otitis media), Weber lateralizes to the diseased/poorer ear. * **Option C (Incorrect):** Lateralization to the **better ear** occurs in **Sensorineural Hearing Loss (SNHL)**. If a patient had permanent nerve damage in one ear, they would hear the vibration better in the healthy ear. * **Option A & D (Incorrect):** Weber is "not lateralized" (central) in individuals with normal hearing or symmetrical hearing loss. It is a highly sensitive test for identifying asymmetrical hearing loss. **NEET-PG High-Yield Pearls:** * **Rinne Test in Otitis Media:** Will be **Negative** (Bone Conduction > Air Conduction), which is the hallmark of CHL. * **ABC (Absolute Bone Conduction) Test:** In otitis media, ABC is **normal**, as the inner ear (cochlea) is unaffected. * **Gelle’s Test:** Used to check ossicular chain patency; it is **negative** in conditions like Otosclerosis or Otitis Media where the middle ear mechanism is stiffened. * **The "Rule of Thumb":** Weber to the bad ear = Conductive; Weber to the good ear = Sensorineural.

Q: Which of the following statements regarding a pseudocyst of the pinna is true?

All of the above.. **Explanation:** **Pseudocyst of the Pinna** is a condition characterized by an intracartilaginous collection of fluid within the auricle, lacking an epithelial lining (hence the term "pseudocyst"). 1. **Why Option A is correct:** It is also known as **idiopathic cystic chondromalacia**. The pathogenesis involves the release of lysosomal enzymes that cause the degradation of auricular cartilage, leading to the formation of a cystic space. 2. **Why Option B is correct:** The classic presentation is a **painless, non-inflammatory, dome-shaped swelling**. It typically occurs on the **anterior surface** of the pinna, specifically within the scaphoid or triangular fossa. It often appears spontaneously or following minor repeated trauma. 3. **Why Option C is correct:** Epidemiological studies and clinical observations indicate a higher prevalence in males, with a peculiar predilection for the **right side** over the left, though the exact reason for this laterality remains idiopathic. Since all individual statements are factually accurate, **Option D (All of the above)** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** * **Site:** Most common in the **scaphoid fossa**. * **Fluid Characteristics:** The aspirated fluid is typically **straw-colored** (serous) and albumin-rich. * **Treatment:** Simple aspiration often leads to recurrence. The treatment of choice is **aspiration followed by pressure dressing** (using buttons or corrugated rubber) or **deroofing** of the cyst wall to prevent fluid re-accumulation and maintain the contour of the pinna. * **Differential Diagnosis:** Must be distinguished from a hematoma auris (which follows significant trauma and is usually painful).

Q: A 7-year-old child presenting with acute otitis media does not respond to ampicillin. Examination reveals a full and bulging tympanic membrane. What is the treatment of choice?

Myringotomy. **Explanation:** The clinical presentation describes a case of **Acute Otitis Media (AOM)** that has failed medical management (ampicillin) and is showing signs of significant middle ear pressure (full and bulging tympanic membrane). **Why Myringotomy is the Correct Answer:** Myringotomy is the surgical incision of the tympanic membrane. In AOM, it is indicated when there is a **failure of medical therapy**, severe earache with a bulging drum, or an impending complication (like facial nerve palsy or mastoiditis). By creating an opening, it provides immediate pain relief by decompressing the middle ear and allows for the drainage of pus, which can be sent for culture and sensitivity to guide further antibiotic therapy. **Analysis of Incorrect Options:** * **Systemic Steroids (A):** These have no role in the primary management of AOM. They are occasionally used in Otitis Media with Effusion (OME) or certain complications, but not for an acute bulging drum. * **Ciprofloxacin (B):** While changing the antibiotic is a consideration, the immediate physical requirement for a "full and bulging" drum that failed initial treatment is drainage. Furthermore, fluoroquinolones are generally avoided as first-line systemic therapy in young children unless specifically indicated by cultures. * **Cortical Mastoidectomy (D):** This is a more invasive procedure reserved for cases of **Coalescent Mastoiditis**. While AOM can lead to mastoiditis, the first step for a bulging drum is simple drainage via myringotomy. **Clinical Pearls for NEET-PG:** * **Most common site for Myringotomy:** Postero-inferior quadrant (to avoid the ossicles and the chorda tympani nerve). * **Indications for Myringotomy in AOM:** Bulging drum with severe pain, persistent fever despite antibiotics, or presence of intracranial/extracranial complications. * **Most common organism in AOM:** *Streptococcus pneumoniae*, followed by *Haemophilus influenzae*.

Q: Which of the following statements about the pinna is true, except?

It develops from the first pharyngeal cleft only.. ### Explanation **1. Why Option C is the Correct Answer (The False Statement)** The pinna does **not** develop from the first pharyngeal cleft alone. It develops from **six auricular hillocks (Hillocks of His)**, which are mesenchymal proliferations derived from both the **first pharyngeal arch (Mandibular arch)** and the **second pharyngeal arch (Hyoid arch)**. * Hillocks 1, 2, and 3 arise from the 1st arch. * Hillocks 4, 5, and 6 arise from the 2nd arch. The first pharyngeal cleft actually gives rise to the **External Auditory Canal (EAC)**. **2. Analysis of Other Options** * **Option A:** Treacher-Collins syndrome (Mandibulofacial dysostosis) is a first and second branchial arch syndrome. It frequently presents with microtia (malformed pinna), atresia of the EAC, and ossicular anomalies. * **Option B:** The framework of the pinna consists of a single piece of **yellow elastic cartilage**. Note that the lobule is the only part of the pinna that lacks cartilage (it contains fat and fibrous tissue). * **Option C:** The pinna acts as a funnel to collect sound waves and its complex ridges (concha, tragus) are essential for **vertical sound localization** and directing sound into the EAC. **3. High-Yield Clinical Pearls for NEET-PG** * **Tragus Development:** Derived from the **1st arch** (1st hillock). * **Pre-auricular Sinus:** Caused by incomplete fusion of the auricular hillocks. * **Nerve Supply:** The pinna has a complex nerve supply: Greater auricular (C2, C3), Lesser occipital (C2), Auriculotemporal (V3), and the Facial (VII) and Vagus (X) nerves (Arnold’s nerve). * **Bat Ear:** A deformity where the concha-scaphal angle is >90° (normal is ~30°).

Q: What type of hearing defect is characteristic of Meniere's disease?

Diplacusis. **Explanation:** **Meniere’s Disease** (Endolymphatic Hydrops) is characterized by a classic tetrad: episodic vertigo, fluctuating sensorineural hearing loss (SNHL), tinnitus, and aural fullness. **Why Diplacusis is correct:** Diplacusis (specifically *Diplacusis Binauralis*) is a hallmark of Meniere’s disease. Due to the distension of the cochlear duct (hydrops), the basilar membrane's tuning mechanism is altered. This causes the same sound frequency to be perceived at a different pitch in the affected ear compared to the normal ear. This "double hearing" is a highly characteristic finding during the active phases of the disease. **Analysis of Incorrect Options:** * **Hyperacusis (A):** An abnormal sensitivity to loud sounds. While seen in conditions like Bell’s Palsy (due to stapedius paralysis) or Tullio’s phenomenon, it is not the defining hearing defect of Meniere’s. * **Hypoacusis (B):** A general term for hearing loss. While Meniere’s causes SNHL, "Diplacusis" is the more specific and characteristic qualitative defect tested in exams. * **Paracusis Willisii (D):** This is a classic feature of **Otosclerosis**, where a patient hears better in noisy environments. **High-Yield Clinical Pearls for NEET-PG:** * **Hearing Loss Pattern:** Early Meniere’s shows **low-frequency SNHL** (rising audiogram). In late stages, it becomes flat or involves all frequencies. * **Recruitment Phenomenon:** Present in Meniere’s (indicates a cochlear lesion). The ear is more sensitive to small increases in intensity. * **Lermoyez Syndrome:** A variant where hearing improves during a vertigo attack ("the reverse Meniere’s"). * **Glycerol Test:** Used for diagnosis; it acts as an osmotic diuretic to temporarily reduce hydrops and improve hearing.

Q: What is the most common site of perforation in the tympanic membrane?

Antero inferior. The tympanic membrane is divided into four quadrants by a vertical line through the handle of the malleus and a horizontal line through the umbo. **Explanation of the Correct Answer:** **Option A (Antero-inferior)** is the most common site for central perforations, particularly those resulting from **Acute Suppurative Otitis Media (ASOM)** or chronic tubotympanic disease. This area is the most vulnerable because it is the most vascularized part of the membrane and is directly adjacent to the opening of the **Eustachian tube**. Infections ascending from the nasopharynx reach this quadrant first, leading to pressure necrosis and subsequent perforation. **Explanation of Incorrect Options:** * **Option B (Postero-inferior):** While perforations can occur here, it is less common than the anterior quadrants. This site is, however, the preferred location for **myringotomy** (grommet insertion) because it is relatively safe from middle ear ossicles. * **Option C (Postero-superior):** This is a "danger zone." Perforations here are typically associated with **attico-antral disease (cholesteatoma)** or retraction pockets. They are less common but clinically more serious due to the risk of ossicular destruction (incus and stapes). * **Option D (Antero-superior):** This area is less frequently involved in isolated perforations compared to the inferior quadrants. **High-Yield Clinical Pearls for NEET-PG:** * **Light Reflex:** Located in the **Antero-inferior** quadrant. * **Safe vs. Unsafe:** Central perforations (Antero-inferior) are "Safe" (Tubotympanic); Marginal/Pars flaccida perforations (Postero-superior/Attic) are "Unsafe" (Attico-antral). * **Myringoplasty:** The success rate is generally higher for posterior perforations than anterior ones because the anterior margin is harder to reach and has less support from the annulus.

Q: A child presents with glue ear, following otitis media two weeks prior. What is the treatment of choice for glue ear?

Myringotomy with ventilation tube insertion. **Explanation:** **Glue Ear (Otitis Media with Effusion - OME)** is characterized by the accumulation of non-purulent, sterile fluid in the middle ear cleft, leading to conductive hearing loss. **1. Why Option C is Correct:** The definitive surgical treatment for persistent or symptomatic glue ear is **Myringotomy with Ventilation Tube (Grommet) insertion**. The grommet serves two primary functions: it bypasses the dysfunctional Eustachian tube to provide continuous ventilation to the middle ear and allows for the drainage/aspiration of the thick "glue-like" secretions. This restores middle ear pressure and improves hearing immediately. **2. Why Other Options are Wrong:** * **Option A & B:** Myringotomy alone (whether by cold knife or laser) provides only temporary relief. Without a ventilation tube, the incision typically heals within 48–72 hours, leading to the re-accumulation of fluid if the underlying Eustachian tube dysfunction persists. * **Option D:** While conservative management (watchful waiting) is often the *initial* step for 3 months, the question asks for the "treatment of choice" for the established condition. Antibiotics are generally ineffective because the fluid in OME is typically sterile and not an active infection. **Clinical Pearls for NEET-PG:** * **Most common cause of hearing loss in children:** Otitis Media with Effusion. * **Tympanogram Finding:** Characteristically shows a **Type B (Flat) curve**. * **Most common site for Myringotomy:** Antero-inferior quadrant (to avoid injury to the ossicles and chorda tympani). * **Indication for Adenoidectomy:** Often performed alongside grommet insertion if the child has adenoid hypertrophy causing Eustachian tube obstruction.

Question 1

What is the commonest cause of Eustachian tube diseases?

Accepted Answer

Adenoids

Answer

Sinusitis

Answer

Otitis media

Answer

Pharyngitis

Question 2

Referred pain in the ear can be caused by all of the following EXCEPT:

Accepted Answer

Furunculosis

Answer

Oral cavity tumors

Answer

Temporomandibular joint problems

Answer

Teething

Question 3

In otitis media, how is Weber's test typically lateralized?

Accepted Answer

Lateralized to the poorer ear

Answer

Not lateralized

Answer

Lateralized to the better ear

Answer

Inconclusive

Question 4

Perforation of the tympanic membrane with destruction of the tympanic annulus is called?

Accepted Answer

Marginal

Answer

Attic

Answer

Subtotal

Answer

Total

Question 5

Which of the following statements regarding a pseudocyst of the pinna is true?

Accepted Answer

All of the above.

Answer

It is also called idiopathic cystic chondromalacia.

Answer

It presents as a painless, spontaneous, dome-shaped cystic swelling on the anterior surface of the auricle.

Answer

It is more common on the right side compared to the left.

Question 6

A 7-year-old child presenting with acute otitis media does not respond to ampicillin. Examination reveals a full and bulging tympanic membrane. What is the treatment of choice?

Accepted Answer

Myringotomy

Answer

Systemic steroid

Answer

Ciprofloxacin

Answer

Cortical mastoidectomy

Question 7

Which of the following statements about the pinna is true, except?

Accepted Answer

It develops from the first pharyngeal cleft only.

Answer

In Treacher-Collins syndrome, a malformed pinna may be present.

Answer

It is made up of elastic cartilage.

Answer

It helps in the localization of sound.

Question 8

What type of hearing defect is characteristic of Meniere's disease?

Accepted Answer

Diplacusis

Answer

Hyperacusis

Answer

Hypoacusis

Answer

Paracusis Willisii

Question 9

What is the most common site of perforation in the tympanic membrane?

Accepted Answer

Antero inferior

Answer

Postero inferior

Answer

Postero superior

Answer

Antero superior

Question 10

A child presents with glue ear, following otitis media two weeks prior. What is the treatment of choice for glue ear?

Accepted Answer

Myringotomy with ventilation tube insertion

Answer

Myringotomy with cold knife

Answer

Myringotomy with diode laser

Answer

Conservative treatment with analgesics and antibiotics

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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