Diseases of the Ear Practice Questions

Q: What is a characteristic feature of tuberculous otitis media?

Multiple perforations in the tympanic membrane. **Explanation:** Tuberculous Otitis Media (TOM) is a chronic granulomatous infection of the middle ear, usually secondary to pulmonary tuberculosis. **Why Option A is correct:** The hallmark of TOM is the presence of **multiple "sieve-like" perforations** in the tympanic membrane. This occurs because multiple tubercles form on the drum, which then undergo caseous necrosis and break down. Over time, these small perforations may coalesce to form a single, large total perforation. **Analysis of Incorrect Options:** * **B. Mastoiditis:** While mastoid involvement occurs in TOM, it is usually characterized by extensive bone destruction and "painless" sequestration rather than the acute, painful mastoiditis seen in pyogenic infections. * **C. Middle ear effusion:** Effusion is typical of Serous Otitis Media (Eustachian tube dysfunction). TOM is characterized by pale granulation tissue and cheesy (caseous) discharge rather than simple sterile fluid. * **D. Ear discharge:** While ear discharge is present in TOM, it is not a *characteristic* feature because it is common to almost all forms of Otitis Media. In TOM, the discharge is specifically described as **painless, odorless, and watery/scanty.** **High-Yield Clinical Pearls for NEET-PG:** 1. **Classic Triad:** Painless ear discharge + Multiple perforations + Profound hearing loss (out of proportion to clinical findings). 2. **Facial Nerve Paralysis:** TOM is a common cause of facial nerve palsy in chronic ear infections. 3. **Diagnosis:** Confirmed by identifying *Mycobacterium tuberculosis* on Ziehl-Neelsen (ZN) stain or culture of the discharge/granulation tissue. 4. **Appearance:** The tympanic membrane and middle ear mucosa often appear pale and "cadaveric."

Q: What is the most common perforation site in the tympanic membrane in acute suppurative otitis media?

Antero-inferior. ### Explanation In **Acute Suppurative Otitis Media (ASOM)**, the middle ear becomes filled with purulent exudate. As the pressure from this pus increases, it leads to pressure necrosis of the tympanic membrane (TM). The **Antero-inferior quadrant** is the most common site for this perforation because it is the most vascular part of the pars tensa. Increased pressure leads to hyperemia followed by ischemia and subsequent necrosis at this specific site. **Analysis of Options:** * **Antero-inferior (Correct):** This is the classic site for perforation in ASOM. Clinically, this is also the preferred site for **Myringotomy** (specifically the postero-inferior or antero-inferior quadrants) to avoid injury to the ossicles. * **Postero-inferior:** While a common site for safe (mucosal) chronic otitis media perforations, it is not the primary site for the initial rupture in acute stages. * **Antero-superior:** This area is less commonly involved in spontaneous ruptures due to the anatomical orientation of the Eustachian tube and middle ear pressure distribution. * **Postero-superior:** This is a "danger zone." Perforations here are typically associated with **Attico-antral disease (Cholesteatoma)** rather than ASOM. Rupture here risks damage to the incudostapedial joint. **Clinical Pearls for NEET-PG:** * **Pulsatile Otorrhoea:** Known as the **"Lighthouse sign,"** it is seen when pus exudes through a small perforation in the ASOM stage of suppuration. * **Myringotomy Site:** Always performed in the **inferior quadrants** (Antero-inferior or Postero-inferior) to avoid the incus and stapes. * **Cartwheel Appearance:** Seen in the Stage of Hyperemia in ASOM due to radiating vessels over the TM.

Q: Most common site for the initiation of otosclerosis is?

Fissula ante fenestrum. **Explanation:** Otosclerosis is a primary metabolic bone disease of the otic capsule characterized by abnormal bone resorption and deposition. **1. Why Fissula Ante Fenestrum is correct:** The **fissula ante fenestrum** is a small area of vestigial embryonic cartilage located just anterior to the oval window. It is the most common site for the initiation of otosclerotic lesions (found in approximately 80-90% of cases). This area is highly susceptible to remodeling, leading to the formation of a "fossa" of spongy bone which eventually spreads to involve the stapes footplate, causing conductive hearing loss. **2. Why other options are incorrect:** * **Footplate of stapes:** While the footplate is frequently involved as the disease progresses (leading to stapedial fixation), it is usually a secondary site of involvement rather than the point of origin. * **Margins of stapes:** The disease involves the annular ligament and the margins of the oval window, but the pathological process typically starts in the otic capsule bone (fissula) and spreads toward these margins. * **Fissula post fenestrum:** This is located posterior to the oval window. While otosclerosis can occur here, it is significantly less common than involvement of the fissula ante fenestrum. **Clinical Pearls for NEET-PG:** * **Schwartze Sign:** A reddish hue seen behind the tympanic membrane due to increased vascularity in active otosclerosis (promontory). * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz**. * **Gelle’s Test:** Negative (indicates stapedial fixation). * **Treatment of Choice:** Stapedotomy (most preferred) or Stapedectomy. * **Medical Management:** Sodium fluoride (used to mature active/spongy lesions).

Q: The lighthouse sign is characteristic of which stage of inflammation?

Stage of suppuration. **Explanation:** The **Lighthouse Sign** is a classic clinical finding in **Acute Suppurative Otitis Media (ASOM)**. It occurs during the **Stage of Suppuration**, where the pressure of accumulated pus in the middle ear leads to a small pinpoint perforation in the pars tensa of the tympanic membrane. Due to the high pressure and the presence of hyperemic (congested) mucosa, the discharge is seen pulsating through this perforation. The rhythmic reflection of light off the pulsating discharge mimics the revolving light of a lighthouse. **Analysis of Options:** * **Stage of Suppuration (Correct):** This stage is defined by the formation of pus under tension and the subsequent rupture of the tympanic membrane. Pulsatile ear discharge is the hallmark of this stage. * **Stage of Hyperemia:** This is the earliest stage characterized by congestion of the pars flaccida and handle of the malleus (cartwheel appearance). There is no perforation or discharge yet. * **Stage of Pre-suppuration:** Characterized by the formation of inflammatory exudate and a bulging, angry-red tympanic membrane. The membrane is still intact, so no "lighthouse" effect can occur. * **Stage of Resolution:** In this stage, the infection subsides, the perforation heals, and the tympanic membrane returns to normal. **Clinical Pearls for NEET-PG:** * **Cartwheel appearance:** Seen in the Stage of Hyperemia. * **Bulging TM (Donut sign):** Seen in the Stage of Pre-suppuration. * **Treatment of choice for Stage of Suppuration:** Systemic antibiotics and ear toilet. If the membrane is bulging and painful (Pre-suppuration), a **Myringotomy** is indicated to relieve pressure and prevent a jagged spontaneous rupture.

Q: Edema over the mastoid is seen in which condition?

Lateral sinus thrombophlebitis. **Explanation:** The correct answer is **Lateral sinus thrombophlebitis**. Edema over the mastoid process in this condition is known as **Griesinger's sign**. **1. Why Lateral Sinus Thrombophlebitis is correct:** Lateral (Sigmoid) sinus thrombophlebitis is a serious intracranial complication of middle ear infections. The sigmoid sinus drains into the internal jugular vein. When a thrombus forms, it can lead to retrograde congestion of the **mastoid emissary vein**, which connects the sigmoid sinus to the extracranial venous system. This congestion results in edema and tenderness over the posterior part of the mastoid bone (Griesinger's sign). **2. Why the other options are incorrect:** * **Bell’s Palsy:** This is an idiopathic lower motor neuron facial nerve palsy. It presents with facial drooping but does not involve venous congestion or mastoid edema. * **CSOM/ASOM:** While these are the underlying infections that *lead* to complications, uncomplicated CSOM or ASOM typically presents with ear discharge or pain. Mastoid edema only occurs if they progress to **Mastoiditis** (edema in the post-auricular sulcus) or **Lateral Sinus Thrombophlebitis** (edema over the mastoid bone). **3. High-Yield Clinical Pearls for NEET-PG:** * **Griesinger’s Sign:** Edema over the mastoid due to mastoid emissary vein thrombosis. * **Picket-fence Fever:** The characteristic hectic, spiking fever seen in lateral sinus thrombophlebitis. * **Tobey-Ayer Test / Queckenstedt’s Test:** Used to detect lateral sinus obstruction by measuring CSF pressure during jugular vein compression. * **Delta Sign:** Seen on contrast-enhanced CT, representing a thrombus in the sigmoid sinus. * **Greisinger's vs. Mastoiditis:** In Mastoiditis, the edema is usually more anterior, causing the pinna to be displaced "downwards and forwards."

Q: An 18-year-old boy experiences recurrent episodes of otitis externa after swimming. Which of the following preventive measures should be recommended?

Use 2% acetic acid after swimming. **Explanation:** **1. Why Option B is Correct:** Otitis externa (Swimmer’s ear) is often triggered by the retention of moisture in the external auditory canal (EAC), which leads to the maceration of skin and an increase in the local pH. The normal EAC is slightly acidic, which acts as a natural defense mechanism against bacterial (e.g., *Pseudomonas*) and fungal growth. **2% Acetic acid** (or aluminum acetate) acts as an acidifying agent. Applying it after swimming restores the acidic environment of the canal, inhibits microbial proliferation, and helps dry the canal, making it the most effective preventive measure. **2. Why Other Options are Incorrect:** * **Option A:** While avoiding swimming prevents exposure, it is an impractical lifestyle restriction for a recurring issue that can be managed medically. * **Option C:** Antibiotic-steroid drops are the mainstay for **treating** active acute otitis externa. However, they are not recommended for long-term prophylaxis as they can lead to the development of resistant organisms or secondary fungal infections (Otomycosis). * **Option D:** Antifungal drops are used to treat Otomycosis. They do not address the primary pathophysiology of "swimmer's ear," which is usually bacterial or inflammatory due to moisture. **3. Clinical Pearls for NEET-PG:** * **Most common pathogen:** *Pseudomonas aeruginosa* is the most common cause of bacterial otitis externa. * **Pathophysiology:** Loss of protective cerumen + moisture + alkaline pH = Bacterial overgrowth. * **Prophylaxis:** Aside from acidifying drops, patients should be advised to use well-fitting earplugs or dry the ears using a hairdryer on a "cool" setting. * **Tragal tenderness:** This is the hallmark clinical sign of Otitis Externa, distinguishing it from Otitis Media.

Q: A 22-year-old man presents with itching, earache, and watery discharge with a musty odor from his ear. Examination reveals a black-headed filamentous growth resembling wet blotting paper. What is the likely diagnosis?

Otomycosis by Aspergillus niger. ### Explanation **Correct Answer: B. Otomycosis by Aspergillus niger** **1. Why it is correct:** The clinical presentation is classic for **Otomycosis**, a fungal infection of the external auditory canal. The diagnosis is confirmed by the specific morphology of the fungal growth. * **Aspergillus niger** is characterized by **black-headed filamentous growth** (conidiophores) that gives the appearance of **"wet blotting paper"** or a "newspaper print" appearance in the ear canal. * The symptoms of intense itching (pruritus), earache, and a watery discharge with a **musty odor** are hallmark features of this fungal colonization. **2. Why other options are incorrect:** * **A. Acute Otitis externa:** This is typically a bacterial infection (often *Pseudomonas*). While it causes pain and discharge, it presents with diffuse canal edema and exquisite tenderness on tragal pressure, without the characteristic filamentous fungal debris. * **C. Aspergillus fumigatus:** While a common cause of otomycosis, it typically presents with **pale blue or greenish** fungal growth rather than black. * **D. Candida:** *Candida albicans* presents as a **white, creamy, or curd-like** discharge (resembling oral thrush) rather than filamentous black heads. **3. NEET-PG High-Yield Pearls:** * **Predisposing factors:** Hot/humid climates, prolonged use of topical antibiotic ear drops (which alters canal flora), and immunocompromised states. * **Key Pathogens:** *Aspergillus niger* (Black), *Aspergillus fumigatus* (Green/Blue), *Aspergillus flavus* (Yellow), and *Candida* (White). * **Treatment:** Thorough **aural toilet** (cleaning) followed by topical antifungal agents like **Clotrimazole** (most common) or Nystatin. Acetic acid drops can be used to restore the acidic pH of the canal. * **Classic Description:** Always look for the keywords "Wet blotting paper" or "Musty odor" to identify Otomycosis in exams.

Q: Direction of water jet while doing syringing of ear should be:

Posterosuperior. **Explanation:** The primary objective of ear syringing is to remove wax or a foreign body using the **"piston effect"** of water pressure. **Why Posterosuperior is Correct:** The external auditory canal (EAC) is not a straight tube; it has a natural curvature. By directing the water jet toward the **posterosuperior wall** of the canal, the water travels along the roof, reaches the tympanic membrane, and reflects back behind the wax bolus. This builds up pressure behind the obstruction, pushing it outward (the "piston effect"). This direction also follows the natural anatomy of the canal when the pinna is pulled upwards and backwards (in adults), minimizing the risk of direct trauma to the tympanic membrane. **Why Other Options are Incorrect:** * **Anteroinferior/Anterosuperior:** The anterior part of the canal has a "recess" (the anterior sulcus) near the drum. Directing water here can trap the wax further or cause the water to strike the drum directly, increasing the risk of perforation or pain. * **Posteroinferior:** This direction is less efficient at creating the necessary back-pressure and may simply push the wax deeper into the bony portion of the canal. **High-Yield 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 and nystagmus. * **Contraindications:** Never syringe if there is a history of **tympanic membrane perforation**, previous ear surgery, or an organic foreign body (like a seed) that might swell. * **Complications:** The most common complication is **injury to the EAC skin**, followed by tympanic membrane perforation and otitis externa.

Question 1

What is a characteristic feature of tuberculous otitis media?

Accepted Answer

Multiple perforations in the tympanic membrane

Answer

Mastoiditis

Answer

Middle ear effusion

Answer

Ear discharge

Question 2

What is the most common perforation site in the tympanic membrane in acute suppurative otitis media?

Accepted Answer

Antero-inferior

Answer

Postero-inferior

Answer

Antero-superior

Answer

Postero-superior

Question 3

A 18-month-old boy presents with a 2-day history of fever, irritability, and frequent tugging of his left ear. He was diagnosed with acute otitis media and treated with antibiotics. Two months later, otoscopic examination reveals air-fluid levels in the left ear, and medical management has failed to resolve the effusion. What is the treatment of choice for this child?

Accepted Answer

Myringotomy with ventilation tube insertion

Answer

Conservative management

Answer

Tympanoplasty

Answer

Myringotomy with diode laser

Question 4

Most common site for the initiation of otosclerosis is?

Accepted Answer

Fissula ante fenestrum

Answer

Food plate of stapes

Answer

Margins of stapes

Answer

Fissula post fenestrum

Question 5

The lighthouse sign is characteristic of which stage of inflammation?

Accepted Answer

Stage of suppuration

Answer

Stage of hyperemia

Answer

Stage of resolution

Answer

Stage of pre-suppuration

Question 6

Edema over the mastoid is seen in which condition?

Accepted Answer

Lateral sinus thrombophlebitis

Answer

Bell's Palsy

Answer

Chronic suppurative otitis media (CSOM)

Answer

Acute suppurative otitis media (ASOM)

Question 7

Otic barotrauma results due to -

Accepted Answer

Descent in air

Answer

Ascent in air

Answer

Linear acceleration

Answer

Sudden acceleration

Question 8

An 18-year-old boy experiences recurrent episodes of otitis externa after swimming. Which of the following preventive measures should be recommended?

Accepted Answer

Use 2% acetic acid after swimming

Answer

Avoid swimming

Answer

Use ear drops containing an antibiotic and steroid

Answer

Use antifungal ear drops after swimming

Question 9

A 22-year-old man presents with itching, earache, and watery discharge with a musty odor from his ear. Examination reveals a black-headed filamentous growth resembling wet blotting paper. What is the likely diagnosis?

Accepted Answer

Otomycosis by Aspergillus niger

Answer

Acute Otitis externa

Answer

Otomycosis by Aspergillus fumigatus

Answer

Otomycosis by Candida

Question 10

Direction of water jet while doing syringing of ear should be:

Accepted Answer

Posterosuperior

Answer

Anteroinferior

Answer

Anterosuperior

Answer

Posteroinferior

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

On this page

Practice by Chapter

Want unlimited practice?