Diseases of the Ear Practice Questions

Q: A one-year-old child presents with bilateral hearing difficulty. Impedance audiometry shows a Type B curve and there is a bilateral conductive hearing deficit. There are no signs of infection. What is the next step?

Wait and watch. ### Explanation The clinical presentation describes **Otitis Media with Effusion (OME)**, also known as Serous Otitis Media or "Glue Ear." The presence of a **Type B (flat) tympanogram** indicates fluid in the middle ear, and the absence of fever or pain rules out acute infection. **1. Why "Wait and Watch" is correct:** In pediatric cases of OME, the standard of care is **watchful waiting for 3 months**. This is because approximately 75–90% of OME cases resolve spontaneously within this period. Since the child is only one year old and there are no signs of acute infection or structural damage, immediate surgical intervention is not indicated. **2. Why the other options are incorrect:** * **Grommet insertion (B):** This is indicated only if the effusion persists beyond 3 months (Chronic OME), if there is significant speech/language delay, or if there are structural changes to the tympanic membrane. * **Myringotomy and aspiration (C):** This provides temporary relief but has a high recurrence rate if done without a ventilation tube (grommet). It is not the first-line management for a fresh diagnosis. * **Canal wall down procedure (D):** This is a radical/modified radical mastoidectomy used for extensive Cholesteatoma or chronic suppurative otitis media (CSOM). It is entirely inappropriate for simple OME. **Clinical Pearls for NEET-PG:** * **Tympanometry Gold Standard:** Type B curve = Fluid (OME); Type C curve = Eustachian tube dysfunction (Negative pressure); Type As = Otosclerosis. * **First-line Medical Management:** There is no proven role for antibiotics, steroids, or antihistamines in OME; observation is the primary strategy. * **Hearing Loss:** OME is the most common cause of conductive hearing loss in children. * **Surgical Indications:** If OME persists >3 months AND is bilateral with hearing loss >20-30 dB, proceed to Myringotomy + Grommet insertion.

Q: Pulsatile otorrhoea is typically seen in which of the following conditions?

Acute suppurative otitis media (ASOM). **Explanation:** **Pulsatile otorrhoea** (also known as the **"Lighthouse effect"**) is a classic clinical sign of **Acute Suppurative Otitis Media (ASOM)** in the stage of suppuration/perforation. 1. **Why ASOM is correct:** During the acute phase of infection, the middle ear mucosa becomes intensely congested and hyperemic. When the tympanic membrane perforates due to pressure, the pus is extruded through a small perforation. Because the underlying mucosa is so vascular, the pulsations of the dilated capillaries are transmitted to the fluid (pus), causing it to "ebb and flow" or pulsate visibly through the perforation. 2. **Why other options are incorrect:** * **Glomus Tumor:** While this condition is famous for **pulsatile tinnitus** (the patient hears their heartbeat) and a "rising sun" appearance behind an intact drum, it does not typically cause pulsatile *otorrhoea* unless there is a secondary infection and perforation, which is rare. * **CSF Otorrhoea:** This presents as a clear, watery discharge (halo sign). While it may pulsate in sync with intracranial pressure changes, it is not the "typical" or classic association taught for this clinical sign in exams. * **Fistula:** A labyrinthine fistula typically presents with vertigo and nystagmus triggered by pressure changes (Hennebert’s sign), not pulsatile discharge. **High-Yield Clinical Pearls for NEET-PG:** * **Lighthouse Sign:** Always associate this term with ASOM. * **Pulsatile Tinnitus vs. Otorrhoea:** If the patient *hears* the pulse, think Glomus Jugulare or Carotid Body Tumor. If the doctor *sees* the discharge pulsing, think ASOM. * **Management of ASOM:** The treatment of choice is systemic antibiotics. If the drum is bulging and painful (pre-perforation), a **myringotomy** is performed in the postero-inferior quadrant.

Q: Which of the following conditions is characterized by a "rising sun" appearance?

Glomus tumor. **Explanation:** The **"Rising Sun" appearance** is a classic otoscopic finding pathognomonic for a **Glomus Tumor** (specifically Glomus Jugulare or Glomus Tympanicum). These are highly vascular, slow-growing, benign but locally invasive paragangliomas. The appearance is caused by a red, fleshy, vascular mass located behind an intact tympanic membrane, typically arising from the hypotympanum and resembling a sun rising over the horizon. **Why the other options are incorrect:** * **Acute Suppurative Otitis Media (ASOM):** Characterized by a **"Cartwheel appearance"** due to radiating congestion of the tympanic membrane or a bulging, hyperemic drum. * **Chronic Suppurative Otitis Media (CSOM):** Typically presents with a permanent perforation of the tympanic membrane (central or marginal) and otorrhea, not a vascular mass. * **Acoustic Neuroma:** This is a tumor of the 8th cranial nerve (vestibulocochlear). Since it is located in the internal auditory canal or cerebellopontine angle, the tympanic membrane appears **normal** on otoscopy. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Tinnitus:** The most common presenting symptom of Glomus tumors (synchronous with the pulse). * **Brown’s Sign:** Positive when the mass blanches on applying pressure with a Siegle’s speculum. * **Aquino’s Sign:** Pulsations of the mass decrease or stop upon carotid artery compression. * **Phelps’ Sign:** Loss of the bony plate between the jugular bulb and the middle ear (seen on CT). * **Treatment of Choice:** Surgical excision; preoperative embolization is often used to reduce vascularity.

Q: All of the following are true about otitic barotrauma except:

Occurs during sudden ascent in aircraft. **Explanation:** Otitic barotrauma (Aerotitis media) occurs due to a failure of the Eustachian tube to equalize pressure between the middle ear and the atmosphere. **Why Option D is the Correct Answer (The False Statement):** Otitic barotrauma occurs during **sudden descent**, not ascent. During ascent, atmospheric pressure decreases, and the middle ear (relatively hyperbaric) naturally vents air through the Eustachian tube. However, during **descent**, atmospheric pressure increases rapidly. If the Eustachian tube is blocked (e.g., due to URTI or allergy), a negative pressure vacuum is created in the middle ear. This "locking" phenomenon prevents air entry, leading to mucosal edema and effusion. **Analysis of Other Options:** * **A. Conductive deafness:** The negative pressure and subsequent fluid/blood accumulation (haemotympanum) in the middle ear impede ossicular movement, leading to conductive hearing loss. * **B. Retracted tympanic membrane:** The relative negative pressure in the middle ear pulls the tympanic membrane inward (Grade 1-2 Teed classification). * **C. Catheterization can be used:** Eustachian tube catheterization or Politzerization is a recognized treatment to force air into the middle ear and equalize pressure once the acute phase has passed. **Clinical Pearls for NEET-PG:** * **Teed Classification:** Used to grade the severity of barotrauma (Grade 0: Symptoms but no signs; Grade 5: Free blood in the middle ear/perforation). * **Prevention:** Valsalva maneuver during descent, chewing gum, or using decongestants before flight. * **Diving:** Barotrauma is the most common medical problem associated with diving (descent phase). * **Treatment:** Decongestants (nasal and oral) are the mainstay; myringotomy is reserved for severe, non-resolving cases.

Q: Barotraumatic otitis media is a result of:

Rapid descent while in an aircraft. **Explanation:** **1. Why Option A is Correct:** Barotraumatic otitis media (Aerotitis) occurs due to a failure of the **Eustachian tube (ET)** to equalize pressure between the middle ear and the atmosphere. During **rapid descent**, the atmospheric pressure increases rapidly. If the ET is blocked or fails to open, a relative **negative pressure** is created in the middle ear. This vacuum effect leads to retraction of the tympanic membrane, mucosal edema, and transudation of fluid or blood into the middle ear cavity. **2. Why Other Options are Incorrect:** * **Option B:** During ascent, atmospheric pressure decreases. The middle ear becomes relatively hyperbaric. This excess pressure usually forces the ET to open passively, allowing air to escape easily. Therefore, barotrauma is much rarer during ascent. * **Options C & D:** Changes in horizontal velocity (acceleration/deceleration) affect the vestibular system (specifically the otolith organs) but do not create the significant atmospheric pressure gradients required to cause middle ear barotrauma. **3. Clinical Pearls for NEET-PG:** * **The Critical Pressure:** If the pressure differential reaches **80–90 mmHg**, the ET becomes "locked" because the pharyngeal muscles (Tensor Veli Palatini) cannot overcome the vacuum to open it. * **Symptoms:** Severe earache (otalgia), hearing loss, tinnitus, and occasionally vertigo. * **Otoscopy Findings:** Retracted TM, "Teed’s scale" grading (ranging from congestion to hemotympanum or perforation). * **Prevention:** Instruct patients to perform the **Valsalva maneuver**, chew gum, or swallow during descent. Decongestants (nasal drops) are helpful if the patient has an upper respiratory infection. * **Treatment:** Most cases are self-limiting; persistent cases may require myringotomy.

Q: Dangerous perforation of the eardrum is located at which anatomical region?

Attic region of the tympanic membrane. **Explanation:** Perforations of the tympanic membrane (TM) are clinically categorized based on their location and their association with underlying pathology, specifically **Cholesteatoma**. **1. Why the Attic region is correct:** The **Attic (Pars Flaccida)** and the **Marginal** (posterior-superior quadrant) regions are associated with **Attico-antral type** of Chronic Suppurative Otitis Media (CSOM). This is termed "dangerous" or "unsafe" because these locations are highly prone to the formation of cholesteatoma—an expanding keratinizing squamous epithelium that causes bone destruction. This can lead to life-threatening intracranial complications (meningitis, brain abscess) or extracranial complications (facial nerve palsy, labyrinthitis). **2. Why the other options are incorrect:** * **Central/Paracentral Perforations:** These are located in the **Pars Tensa** and are surrounded by a rim of the tympanic membrane. They are associated with **Tubotympanic type** of CSOM. This is termed "safe" because it rarely leads to cholesteatoma or serious bone-eroding complications. **Clinical Pearls for NEET-PG:** * **Safe CSOM (Tubotympanic):** Central perforation, profuse/mucoid/non-foul smelling discharge, low risk of complications. * **Unsafe CSOM (Attico-antral):** Attic or Marginal perforation, scanty/purulent/foul-smelling discharge (due to bone destruction), high risk of complications. * **Pathognomonic sign:** The presence of **cholesteatoma flakes** (pearly white mass) or **granulation tissue** at the attic/marginal area is a hallmark of dangerous disease. * **Management:** Safe CSOM is often managed medically or via Myringoplasty; Unsafe CSOM almost always requires surgical intervention (Mastoidectomy).

Question 1

Cholesteatoma most commonly occurs in which of the following conditions?

Accepted Answer

Acute necrotizing otitis media

Answer

Chronic suppurative otitis media with central perforation

Answer

Masked mastoiditis

Answer

Coalescent mastoiditis

Question 2

A one-year-old child presents with bilateral hearing difficulty. Impedance audiometry shows a Type B curve and there is a bilateral conductive hearing deficit. There are no signs of infection. What is the next step?

Accepted Answer

Wait and watch

Answer

Grommet insertion

Answer

Myringotomy and aspiration

Answer

Canal wall down procedure

Question 3

A 7-year-old child with acute otitis media was treated with antibiotics for 10 days. His pain and fever subsided completely, but he still has conductive hearing loss. What is the next line of treatment?

Accepted Answer

Wait and observe for 3 months for spontaneous fluid drainage.

Answer

Give another course of a different antibiotic.

Answer

Perform a myringotomy and culture the middle ear fluid.

Answer

Perform a myringotomy and insert a grommet.

Question 4

What causes the maximum hearing loss?

Accepted Answer

Obliteration of the oval window

Answer

Ossicular chain damage

Answer

Tympanic membrane perforation

Answer

Blockage of the ear canal

Question 5

Pulsatile otorrhoea is typically seen in which of the following conditions?

Accepted Answer

Acute suppurative otitis media (ASOM)

Answer

Glomus tumor

Answer

CSF otorrhea

Answer

Fistula

Question 6

Which of the following conditions is characterized by a "rising sun" appearance?

Accepted Answer

Glomus tumor

Answer

Acute suppurative otitis media (ASOM)

Answer

Chronic suppurative otitis media (CSOM)

Answer

Acoustic neuroma

Question 7

All of the following are true about otitic barotrauma except:

Accepted Answer

Occurs during sudden ascent in aircraft

Answer

Conductive deafness

Answer

Retracted tympanic membrane

Answer

Catheterization can be used

Question 8

Barotraumatic otitis media is a result of:

Accepted Answer

Rapid descent while in an aircraft

Answer

Rapid ascent while in an aircraft

Answer

Sudden acceleration while in a bus

Answer

Sudden deceleration while in a bus

Question 9

Which of the following conditions causes maximum hearing loss?

Accepted Answer

Ossicular disruption with intact tympanic membrane

Answer

Disruption of malleus and incus with intact tympanic membrane

Answer

Otitis media with effusion

Answer

Pial fixation of the stapes footplate

Question 10

Dangerous perforation of the eardrum is located at which anatomical region?

Accepted Answer

Attic region of the tympanic membrane

Answer

Central tympanic membrane

Answer

Paracentral tympanic membrane

Answer

All of the above

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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