Diseases of the Ear Practice Questions

Q: Which of the following is associated with objective tinnitus?

Glomus tumor. **Explanation:** Tinnitus is classified into two types: **Subjective** (heard only by the patient) and **Objective** (audible to both the patient and the examiner). **Why Glomus Tumor is the Correct Answer:** A Glomus tumor (Paraganglioma) is a highly vascular neoplasm. Because of its extreme vascularity and proximity to the middle ear structures, it produces **pulsatile objective tinnitus**. The sound corresponds to the patient’s heartbeat and can often be heard by an examiner using a stethoscope or a Toynbee tube placed over the external auditory canal. This is a classic "vascular" cause of tinnitus. **Analysis of Incorrect Options:** * **Meniere’s Disease:** Characterized by low-pitched, roaring **subjective** tinnitus, usually accompanied by vertigo and sensorineural hearing loss. * **Acoustic Neuroma:** Typically presents with high-pitched, continuous **subjective** tinnitus due to compression of the cochlear nerve. * **Ear Wax (Cerumen):** Causes **subjective** tinnitus due to conductive interference or the physical sensation of the wax touching the tympanic membrane. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Tinnitus:** Always think of vascular etiologies like Glomus tumors, carotid artery stenosis, or benign intracranial hypertension. * **Brown’s Sign:** Pulsation of the tumor mass seen on otoscopy in Glomus jugulare/tympanicum, which blanches on positive pressure with a Siegle’s bulb. * **Aquino’s Sign:** Blanching of the tympanic mass upon carotid artery compression (specific to Glomus tumors). * **Objective Tinnitus (Non-vascular):** Can also be caused by palatal myoclonus or patulous Eustachian tube (clicking/rushing sounds).

Q: Which of the following statements about the tympanic membrane is FALSE?

A healed tympanic membrane perforation has three layers.. ### Explanation **1. Why Option C is the Correct (False) Statement:** A normal tympanic membrane (TM) consists of three distinct layers: an outer epithelial layer (ectoderm), a middle fibrous layer (mesoderm), and an inner mucosal layer (endoderm). When a perforation heals spontaneously, the **middle fibrous layer (lamina propria) fails to regenerate** properly. Consequently, a healed TM (often called a "monomeric" membrane) consists of only **two layers**: the outer epithelial and inner mucosal layers. This makes the healed area thinner, more translucent, and prone to retraction. **2. Analysis of Other Options:** * **Option A (True):** The cone of light is a triangular reflection of the otoscope light seen in the **antero-inferior quadrant**. It radiates from the umbo towards the periphery. * **Option B (True):** The TM is divided into two parts: the **Pars Flaccida** (Shrapnell’s membrane), which is the small, superior, lax portion above the lateral process of the malleus, and the **Pars Tensa**, which forms the majority of the membrane. * **Option D (True):** The **umbo** is the most central, depressed part of the TM where the tip of the handle of the malleus is firmly attached. It is the point of maximum concavity. ### High-Yield Clinical Pearls for NEET-PG: * **Annulus Tympanicus:** The fibrous rim that anchors the pars tensa into the tympanic sulcus. It is **absent** in the Notch of Rivinus (superiorly), which is why the pars flaccida is "flaccid." * **Blood Supply:** The outer surface is supplied by the deep auricular branch of the maxillary artery; the inner surface by the anterior tympanic and stylomastoid arteries. * **Nerve Supply:** A common "catch" in exams—the inner surface is supplied by the **Glossopharyngeal nerve (CN IX)** via the tympanic plexus (Jacobson’s nerve). The outer surface is supplied by CN V3 and CN X.

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

Anterior inferior quadrant. **Explanation:** In **Acute Suppurative Otitis Media (ASOM)**, the accumulation of inflammatory exudate (pus) within the middle ear cavity leads to increased pressure against the tympanic membrane. As the pressure rises, the membrane undergoes necrosis at its most vulnerable point, leading to a spontaneous perforation. **Why the Anterior Inferior Quadrant is Correct:** The **Anterior Inferior Quadrant** is the most common site for perforation in ASOM because it is the most vascularized part of the pars tensa. During the stage of suppuration, the intense inflammatory response and pressure lead to localized ischemia and subsequent necrosis in this specific area. Additionally, this quadrant is furthest from the ossicular chain, making it a frequent site for the "pointing" of an abscess. **Analysis of Incorrect Options:** * **Anterior Superior Quadrant:** This area is less commonly involved in ASOM perforations. However, it is a significant site for retracted pockets or cholesteatoma in chronic cases. * **Posterior Superior Quadrant:** Perforations here are rare in ASOM but are highly "unsafe" in chronic otitis media, as they are often associated with cholesteatoma and ossicular destruction (incudostapedial joint). * **Posterior Inferior Quadrant:** While perforations can occur here, it is not the statistically most common site. This quadrant is, however, the **preferred site for Myringotomy** because it is relatively safe from the ossicles and the Eustachian tube orifice. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Otorrhea:** Also known as the **"Light-house sign,"** this is seen when pus exudes through a small perforation in ASOM. * **Myringotomy Site:** Always performed in the **Postero-inferior quadrant** to avoid injury to the incus and stapes. * **Cartwheel Appearance:** Seen in the Stage of Hyperemia in ASOM due to radiating leashes of blood vessels.

Q: What is the most common extra-cranial complication of acute suppurative otitis media (ASOM)?

Mastoiditis. **Explanation:** **1. Why Mastoiditis is Correct:** Acute Mastoiditis is the most common extra-cranial complication of Acute Suppurative Otitis Media (ASOM). Anatomically, the middle ear cleft and the mastoid antrum are continuous. In ASOM, the inflammatory process frequently extends into the mastoid air cells. When the infection leads to the destruction of the bony inter-cellular septa (coalescence), it is termed **Coalescent Mastoiditis**. This remains the most frequent complication despite the widespread use of antibiotics. **2. Analysis of Incorrect Options:** * **Facial Nerve Paralysis (Option A):** This is an extra-cranial complication but is less common than mastoiditis. It occurs due to inflammatory edema of the nerve within the fallopian canal, often through a dehiscent canal. * **Lateral Sinus Thrombosis (Option B):** This is an **intra-cranial** complication (specifically, an intra-cranial vascular complication). It is less common than mastoiditis in the post-antibiotic era. * **Brain Abscess (Option C):** This is the most common **intra-cranial** complication of chronic suppurative otitis media (CSOM), but it is not the most common complication overall, nor is it extra-cranial. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common complication of ASOM:** Mastoiditis (Extra-cranial). * **Most common intra-cranial complication of Otitis Media:** Meningitis (overall), but Brain Abscess is often cited as the most common in the context of CSOM/Cholesteatoma. * **Reservoir Sign:** A classic clinical sign of mastoiditis where the external auditory canal fills with pus immediately after being wiped clean. * **Iron-clad Rule:** Any patient with ASOM who develops retroauricular swelling, tenderness, or sagging of the posterosuperior meatal wall should be suspected of having Mastoiditis.

Q: A 62-year-old male patient presents to the OPD with right ear pain and reduced hearing. On examination, the external auditory canal (EAC) is blocked and shows a "wet newspaper" appearance. Which organism is causing this otomycosis?

Aspergillus niger. **Explanation:** **Otomycosis** is a fungal infection of the external auditory canal, commonly seen in hot, humid climates or in patients with poor ear hygiene or prolonged use of antibiotic ear drops. 1. **Why Aspergillus niger is correct:** The classic clinical description of a **"wet newspaper"** appearance (or "wet blotting paper") is pathognomonic for **Aspergillus niger**. This occurs because the fungal hyphae and debris form a grayish-white mass, which is studded with **black conidiophores** (black spores), giving it a characteristic "peppered" or "sooty" appearance. 2. **Why the other options are incorrect:** * **Aspergillus fumigatus:** This typically presents with **pale blue or greenish** spores. While it is a common cause of otomycosis, it does not produce the classic black "wet newspaper" look. * **Candida albicans:** This presents as a **creamy white, curd-like** discharge. It is often associated with itching and is more common in immunocompromised individuals or those with chronic maceration. * **Tinea:** This refers to dermatophytosis, which usually affects the skin of the pinna or the outer canal as scaly, itchy plaques, but it does not present with the "wet newspaper" debris seen in deep canal infections. **High-Yield Clinical Pearls for NEET-PG:** * **Most common symptom:** Intense itching (pruritus) and ear pain (otalgia). * **Most common organisms:** *Aspergillus niger* (Black), *Aspergillus fumigatus* (Green/Blue), and *Candida* (White). * **Treatment:** Thorough **aural toilet** (suctioning/cleaning) is the most crucial step, followed by topical antifungal agents like **Clotrimazole** or 1% Acetic acid drops to restore the acidic pH of the canal. * **Differential Diagnosis:** Must be differentiated from Otitis Externa Circumscripta (furuncle) which presents with localized tenderness.

Q: Painless discharge from the ear and multiple tympanic membrane perforations are characteristic of?

Tuberculous otitis media. **Explanation:** The correct answer is **Tuberculous Otitis Media (TOM)**. This is a chronic granulomatous infection of the middle ear caused by *Mycobacterium tuberculosis*. **Why Tuberculous Otitis Media is correct:** The classic clinical triad of TOM includes: 1. **Painless ear discharge:** Unlike pyogenic otitis media, the onset is insidious and painless. 2. **Multiple tympanic membrane perforations:** These occur due to the coalescence of multiple small tubercles on the drum. 3. **Profound hearing loss:** Often out of proportion to the clinical findings due to early inner ear involvement. Other features include pale granulations in the middle ear and early facial nerve paralysis. **Why the other options are incorrect:** * **Fungal Otitis Media (Otomycosis):** Characterized by intense itching, pain, and a "wet newspaper" or "velvety" appearance of the canal (due to *Aspergillus* or *Candida*). It does not typically cause multiple perforations. * **Serous Otitis Media (Otitis Media with Effusion):** Presents with an intact, retracted tympanic membrane and conductive hearing loss. There is no discharge or perforation. * **Viral Otitis Media:** Usually presents as Bullous Myringitis (painful vesicles on the drum) or as part of an upper respiratory infection. It does not cause chronic painless discharge or multiple perforations. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Culture of the discharge on Lowenstein-Jensen (LJ) medium or demonstration of Acid-Fast Bacilli (AFB) on smear. * **Pathognomonic sign:** Multiple perforations (though these may later coalesce into a single large central perforation). * **Treatment:** Standard Anti-Tubercular Therapy (ATT) for 6 months. Surgery is reserved for complications like mastoiditis or facial palsy.

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.

Question 1

Which of the following is associated with objective tinnitus?

Accepted Answer

Glomus tumor

Answer

Meiners disease

Answer

Acoustic neuroma

Answer

Ear wax

Question 2

Which of the following statements about the tympanic membrane is FALSE?

Accepted Answer

A healed tympanic membrane perforation has three layers.

Answer

The cone of light is located antero-inferiorly.

Answer

Shrapnell's membrane is also known as the pars flaccida.

Answer

The attachment of the tympanic membrane to the tip of the malleus handle is called the umbo.

Question 3

What is the most common site of perforation of the tympanic membrane in acute suppurative otitis media (ASOM)?

Accepted Answer

Anterior inferior quadrant

Answer

Anterior superior quadrant

Answer

Posterior superior quadrant

Answer

Posterior inferior quadrant

Question 4

What is the most common extra-cranial complication of acute suppurative otitis media (ASOM)?

Accepted Answer

Mastoiditis

Answer

Facial nerve paralysis

Answer

Lateral sinus thrombosis

Answer

Brain abscess

Question 5

A 62-year-old male patient presents to the OPD with right ear pain and reduced hearing. On examination, the external auditory canal (EAC) is blocked and shows a "wet newspaper" appearance. Which organism is causing this otomycosis?

Accepted Answer

Aspergillus niger

Answer

Aspergillus fumigatus

Answer

Candida

Answer

Tinea

Question 6

Painless discharge from the ear and multiple tympanic membrane perforations are characteristic of?

Accepted Answer

Tuberculous otitis media

Answer

Fungal otitis media

Answer

Serous otitis media

Answer

Viral otitis media

Question 7

What is the commonest cause of Eustachian tube diseases?

Accepted Answer

Adenoids

Answer

Sinusitis

Answer

Otitis media

Answer

Pharyngitis

Question 8

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 9

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 10

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

Accepted Answer

Marginal

Answer

Attic

Answer

Subtotal

Answer

Total

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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