Diseases of the Ear — MCQs

Diseases of the Ear Indian Medical PG Practice Questions and MCQs

Question 201: The following test is useful for diagnosis of all except:

A. Ossicular discontinuity
B. Otosclerosis
C. Serous otitis media
D. Postmeningitis deafness (Correct Answer)

Explanation: ***Postmeningitis deafness*** - The image illustrates a **tympanometer**, which primarily assesses the function of the **middle ear** and **eardrum mobility** within the context of air pressure changes. - **Postmeningitis deafness** typically results from **sensorineural hearing loss** due to damage to the **cochlea** or **auditory nerve**, which is a condition of the inner ear and cannot be directly diagnosed by tympanometry. *Ossicular discontinuity* - This condition involves a break or separation in the **ossicular chain**, leading to excessive mobility of the tympanic membrane. - Tympanometry in **ossicular discontinuity** typically shows a **Type Ad tympanogram**, characterized by abnormally high compliance due to the lack of resistance from the damaged ossicles. *Otosclerosis* - **Otosclerosis** involves abnormal bone growth around the **stapes** footplate, leading to its fixation and reduced mobility. - Tympanometry in otosclerosis typically yields a **Type As tympanogram**, indicating abnormally low compliance or a shallow peak. *Serous otitis media* - Also known as **otitis media with effusion**, this condition involves the accumulation of fluid in the middle ear without signs of acute infection. - Tympanometry in **serous otitis media** typically presents with a **Type B tympanogram**, characterized by a flat curve due to reduced or absent eardrum mobility caused by the fluid.

Question 202: A 1-year-old child presents with high grade fever for 2 days with multiple episodes of loose motions. The child is inconsolable. The otoscopic finding is given below. All of the following lead to the development of this condition except:

A. Cystic fibrosis
B. Ciliary dyskinesia
C. Breastfeeding child in supine position (Correct Answer)
D. Cleft Palate

Explanation: ***Breastfeeding child in supine position*** - **Breastfeeding** itself is **protective against acute otitis media** due to immunological factors (IgA antibodies, lactoferrin, and other antimicrobial components in breast milk). - Unlike **bottle-feeding in supine position**, which allows formula to pool and reflux into the Eustachian tube, breastfeeding involves active sucking mechanics that prevent such reflux. - While supine positioning during feeding can theoretically increase aspiration risk, **breastfeeding does not contribute to Eustachian tube dysfunction** or middle ear infections; in fact, exclusively breastfed infants have **lower rates of otitis media**. - This is the **exception** - it does NOT lead to the development of acute otitis media. *Cystic fibrosis* - **Cystic fibrosis** causes abnormally thick, viscous mucus production that obstructs the **Eustachian tube**, preventing proper ventilation and drainage of the middle ear. - This chronic obstruction creates an environment conducive to bacterial overgrowth and recurrent **otitis media**. - Children with CF have significantly higher rates of middle ear infections. *Ciliary dyskinesia* - **Primary ciliary dyskinesia** (including Kartagener syndrome) impairs mucociliary clearance throughout the respiratory tract, including the **Eustachian tube**. - Dysfunctional cilia cannot effectively clear pathogens and secretions, leading to fluid accumulation in the middle ear and recurrent **otitis media**. - This is a well-recognized risk factor for chronic ear infections. *Cleft Palate* - **Cleft palate** causes anatomical and functional abnormalities of the **Eustachian tube**, particularly affecting the tensor veli palatini muscle that opens the tube. - This results in **Eustachian tube dysfunction** with impaired middle ear ventilation and drainage, leading to chronic otitis media with effusion. - Nearly all children with unrepaired cleft palate develop middle ear problems.

Question 203: A 1-year-old child presents with high grade fever for 2 days with multiple episodes of loose motions. The child is inconsolable. The otoscopic finding is given below. What is the diagnosis?

A. Acute otitis media (Correct Answer)
B. Foreign body
C. Aero otitis media
D. Retraction pockets

Explanation: ***Acute otitis media*** - The image shows a **red, bulging tympanic membrane** with loss of bony landmarks, which are classic signs of acute otitis media. The child's symptoms of high fever, inconsolability, and loose motions (potentially due to a viral infection predisposing to ear infection) are also consistent with AOM. - The presence of pus or fluid behind the eardrum causes it to bulge, and the inflammation leads to its characteristic red appearance. *Foreign body* - A foreign body in the ear canal would typically be **visible directly** on otoscopy and would not usually cause the drum to bulge in this manner. - While it can cause pain and discomfort, it is less likely to present with systemic symptoms like high fever unless an infection has supervened (which would then manifest as AOM). *Aero otitis media* - **Aero-otitis media**, also known as barotrauma, is caused by rapid changes in air pressure. - While it can cause ear pain, the eardrum typically appears **retracted** or shows **hemorrhage**, not the diffuse bulging seen in the image. *Retraction pockets* - **Retraction pockets** indicate a chronically retracted tympanic membrane, often due to chronic negative middle ear pressure. - The image clearly shows a **bulging, inflamed eardrum**, inconsistent with retraction.

Question 204: A 25-year-old male complains of difficulty in hearing which has been worsening over last 6 months with occasional tinnitus. Otoscopy shows normal tympanic membrane. Pure tone audiometry shows following recording. What is the diagnosis?

A. Otosclerosis (Correct Answer)
B. Meniere's disease
C. Serous otitis media
D. Ear wax

Explanation: ***Otosclerosis*** - The audiogram shows a **conductive hearing loss** with an air-bone gap, especially prominent at 2000 Hz (Carhart's notch), which is a classic finding in otosclerosis. - The patient's age (25-year-old male) and symptoms of progressive hearing loss and tinnitus with a **normal tympanic membrane** are consistent with otosclerosis. *Meniere's disease* - Meniere's disease typically presents with **fluctuating sensorineural hearing loss**, vertigo, tinnitus, and aural fullness, not conductive hearing loss. - The audiogram for Meniere's would primarily show **low-frequency sensorineural hearing loss**, without an air-bone gap like the one seen here. *Serous otitis media* - Serous otitis media causes **conductive hearing loss** due to fluid in the middle ear, but it is typically associated with a **dull or retracted tympanic membrane** and often occurs in children or after an upper respiratory infection. - While it causes conductive hearing loss, the specific pattern (Carhart's notch) and a normal tympanic membrane make otosclerosis a more likely diagnosis in this young adult. *Ear wax* - An **ear wax impaction** would also cause a conductive hearing loss, but it would be clearly visible on otoscopy, which is noted as normal in this case. - The audiogram would likely show a more generalized conductive loss rather than the specific pattern observed with Carhart's notch.

Question 205: The tympanogram shown below is seen in which of the following conditions?

A. X= Ossicular discontinuity, Y= Middle ear effusion (Correct Answer)
B. X= Retracted tympanic membrane, Y= Middle ear effusion
C. X= Thin lax tympanic membrane, Y= Otosclerosis
D. X= Malleus fixation, Y= Thin lax tympanic membrane

Explanation: ***X= Ossicular discontinuity, Y= Middle ear effusion*** - Curve **X** shows a **hypermobile tympanogram** with extremely high peak compliance, characteristic of **ossicular discontinuity** where the broken ossicular chain allows excessive tympanic membrane movement. - Curve **Y** demonstrates a **flat Type B tympanogram** with no identifiable peak, indicating **middle ear effusion** where fluid prevents normal tympanic membrane mobility. *X= Retracted tympanic membrane, Y= Middle ear effusion* - A **retracted tympanic membrane** produces a **Type C tympanogram** with the peak shifted to negative pressure, not the hypermobile pattern seen in curve X. - While curve Y correctly represents middle ear effusion, curve X is inconsistent with tympanic membrane retraction. *X= Thin lax tympanic membrane, Y= Otosclerosis* - Although a **thin lax tympanic membrane** can cause hypermobility, **ossicular discontinuity** better explains the extreme hypercompliance shown in curve X. - **Otosclerosis** typically produces a **Type As tympanogram** with reduced compliance and a shallow peak, not the flat pattern of curve Y. *X= Malleus fixation, Y= Thin lax tympanic membrane* - **Malleus fixation** (as in otosclerosis) results in **reduced compliance** and a Type As pattern, opposite to the hypermobile curve X. - A **thin lax tympanic membrane** would indeed show hypermobility, but this doesn't match the flat, non-compliant pattern of curve Y.

Question 206: The tympanogram shown below is seen in which of the following conditions?

A. Otosclerosis
B. Malleus fixation
C. Retracted tympanic membrane (Correct Answer)
D. Ossicular disruption

Explanation: ***Retracted tympanic membrane*** - The tympanogram displays a **Type C** curve, characterized by **normal compliance** but with the peak shifted to **negative pressure**, indicating **Eustachian tube dysfunction**. - This negative pressure shift occurs when the middle ear cannot equalize pressure with the atmosphere, causing the tympanic membrane to retract inward. *Otosclerosis* - Otosclerosis typically causes a **Type As** tympanogram, with **normal pressure** but **reduced compliance** (shallow peak), due to the stiffening of the ossicular chain. - The **stapes fixation** in otosclerosis restricts tympanic membrane vibration, leading to low compliance, not the normal compliance seen here. *Ossicular disruption* - Ossicular disruption causes a **Type Ad** tympanogram with **normal pressure** but **abnormally high compliance** (deep, sharp peak). - This **hypermobile middle ear system** occurs when the ossicular chain is disarticulated, allowing excessive tympanic membrane movement, contrary to the normal compliance shown. *Malleus fixation* - Malleus fixation leads to a **stiffened middle ear system** and would present as a **Type As** tympanogram with **reduced compliance**. - The **inability of the malleus to move freely** impedes sound transmission and reduces eardrum flexibility, not consistent with normal compliance.

Question 207: Which of the following is correct about ear speculum insertion?

A. Pinna : upward, backward and laterally; Tragus: forward (Correct Answer)
B. Pinna : downward, backward and laterally; Tragus: forward
C. Pinna : upward, backward and medially; Tragus: forward
D. Pinna : upward, forward and laterally ; Tragus: forward

Explanation: ***Pinna : upward, backward and laterally; Tragus: forward*** - To properly visualize the **tympanic membrane** and ear canal in adults, the **pinna** (auricle) should be gently pulled **upward, backward, and laterally**. This maneuver helps to straighten the **ear canal**. - The **tragus** should be gently pushed **forward** to stabilize the ear and facilitate speculum insertion, minimizing discomfort [1]. *Pinna : downward, backward and laterally; Tragus: forward* - Pulling the **pinna downward** is typically recommended for **children** to straighten their ear canal. - Doing so in adults may not adequately straighten the **ear canal**, hindering visualization. *Pinna : upward, backward and medially; Tragus: forward* - While pulling the pinna **upward and backward** is correct, pulling it **medially** would likely obstruct the view or cause discomfort. - The goal is to open the **ear canal** for better visualization [1]. *Pinna : upward, forward and laterally ; Tragus: forward* - Pulling the pinna **forward** would likely curl the helix and obstruct the **external auditory canal**, making it difficult to insert the speculum. - The correct direction is **backward** to align the cartilaginous and bony parts of the canal [1].

Question 208: A 20-year-old woman presents with history of scanty ear discharge since childhood. While cleaning the ear today she had bleeding and came to OPD. Otoscopic examination was performed and is shown below. All are true about the condition shown except:

A. Atticoantral type of perforation
B. It is cholesteatoma which is an epidermal inclusion cyst containing cholesterol crystals (Correct Answer)
C. Cessation of discharge is an ominous sign
D. Development of vertigo indicates labyrinthitis

Explanation: ***It is cholesteatoma which is an epidermal inclusion cyst containing cholesterol crystals*** ✓ **CORRECT (False Statement)** - This is the **EXCEPT answer** because while cholesteatoma is an **epidermal inclusion cyst**, it does **NOT contain cholesterol crystals** - Cholesteatoma contains **keratin debris** from desquamated stratified squamous epithelium, not cholesterol crystals - The name "cholesteatoma" is a misnomer - it is neither a tumor nor does it contain cholesterol - The image shows a **retraction pocket** in the attic region with **pearly white debris**, classic for cholesteatoma *Atticoantral type of perforation* (True Statement) - The image demonstrates a **retraction pocket** in the **pars flaccida** (attic region), characteristic of **atticoantral type** CSOM - This type typically involves the posterosuperior quadrant or attic and is commonly associated with cholesteatoma - Unlike tubotympanic (safe) type, atticoantral (unsafe) type has higher risk of complications *Cessation of discharge is an ominous sign* (True Statement) - Sudden **cessation of ear discharge** in cholesteatoma is an **ominous sign** - Indicates that pus has been **trapped** inside the middle ear or mastoid cavity - Can lead to serious complications: **intracranial abscesses**, **meningitis**, **brain abscess**, or **facial nerve palsy** - Requires urgent evaluation and management *Development of vertigo indicates labyrinthitis* (True Statement) - **Vertigo** in chronic otitis media with cholesteatoma suggests **labyrinthine involvement** - Occurs due to erosion of the **lateral semicircular canal** bone by cholesteatoma - Creates a **fistula** into the labyrinth, causing **labyrinthitis** - Results in vertigo, nausea, nystagmus, and positive fistula test

Question 209: A 2-year-old child presents with profuse odorless ear discharge following a URTI. Otoscopic examination shows:

A. Tubotympanic chronic suppurative otitis media (Correct Answer)
B. Atticoantral chronic suppurative otitis media
C. Aero otitis media
D. Ear polyp

Explanation: ***Tubotympanic chronic suppurative otitis media*** - Presents with **large central perforation** with **profuse, odorless, mucopurulent discharge** - Classic "safe type" CSOM without bone erosion or cholesteatoma - Common in children following **URTI** which causes Eustachian tube dysfunction - Otoscopy shows **central perforation** with granulation tissue and pus - Discharge is odorless (vs foul-smelling in unsafe type) *Atticoantral chronic suppurative otitis media* - The "unsafe type" characterized by **marginal or attic perforation** - Associated with **cholesteatoma** and produces **foul-smelling discharge** - Often involves bone erosion and serious complications - Clinical presentation here lacks foul smell and marginal perforation *Aero otitis media* - Acute **barotrauma** from rapid atmospheric pressure changes (flying, diving) - Presents with acute pain, hearing loss, hemotympanum - Does not cause chronic profuse discharge or perforation - Self-limiting condition, not chronic inflammation *Ear polyp* - **Pedunculated inflammatory mass** arising from middle ear mucosa - Appears as discrete pale/pink growth protruding through perforation - Can occur secondary to chronic otitis media - The description indicates diffuse discharge with granulation tissue, not a discrete polyp

Question 210: Identify the triangle marked as X in the figure.

A. Trautmann's triangle (Correct Answer)
B. Macewen's triangle
C. Citelli's triangle
D. Solid angle

Explanation: ***Trautmann's triangle*** - **Trautmann's triangle** is an anatomical landmark used in otologic surgery, specifically for approaching the posterior fossa. - It is bounded by the **superior petrosal sinus**, the **sigmoid sinus**, and the **dura of the posterior fossa**. *Macewen's triangle* - **Macewen's triangle** (also known as the suprameatal triangle) is an area on the lateral aspect of the mastoid process. - It is a key landmark during mastoidectomy to locate the **mastoid antrum**. *Citelli's triangle* - **Citelli's triangle** is an area of bone located posterior to the external auditory canal and inferior to the temporal squama. - It is a site of particular surgical importance in identifying the **facial nerve** during mastoid procedures. *Solid angle* - The term **solid angle** refers to a three-dimensional angle, typically measured in steradians. - It is a concept in geometry and physics, not an anatomical triangle in the human body.

Practice by Chapter

Otitis Externa

Practice Questions

Acute Otitis Media

Practice Questions

Chronic Otitis Media

Practice Questions

Complications of Otitis Media

Practice Questions

Otosclerosis

Practice Questions

Presbycusis

Practice Questions

Sudden Sensorineural Hearing Loss

Practice Questions

Noise-Induced Hearing Loss

Practice Questions

Ménière's Disease

Practice Questions

Benign Paroxysmal Positional Vertigo

Practice Questions

Vestibular Neuritis

Practice Questions

Tumors of the Ear and Temporal Bone

Practice Questions

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