Diseases of the Ear Practice Questions

Q: Throat infection causes ear infection through:

Eustachian tube. ***Eustachian tube*** - The **Eustachian tube** connects the nasopharynx (area behind the nose and above the soft palate, close to the throat) to the middle ear. - During a throat infection, **pathogens** can travel up this tube, especially in children due to its more horizontal and shorter nature, leading to **otitis media**. *Hematogenous spread* - This refers to the spread of infection through the **bloodstream**, which is not the primary mechanism for a direct throat-to-ear infection. - While possible in some systemic infections, it is not the typical route for **otitis media** following a throat infection. *Cranial spread* - **Cranial spread** implies infection moving directly through the bones or tissues of the skull, which is not how most common ear infections from the throat occur. - This route is typically associated with very severe or complicated infections like **mastoiditis** that erode bone. *Simultaneous infection* - **Simultaneous infection** suggests two separate infections occurring at the same time, possibly from the same source, but it doesn't explain the *route* of spread from the throat to the ear. - The connection between these two sites is anatomical, not merely coincidental timing of infections.

Q: Which of the following is NOT a feature of a moderately retracted tympanic membrane?

Tympanic membrane appears bulging outward. ***Tympanic membrane appears bulging outward*** - A **bulging tympanic membrane** is characteristic of **acute otitis media** or **pus accumulation** in the middle ear, indicating increased pressure pushing the membrane outwards. It IS NOT a feature of retraction. - **Retraction** implies the tympanic membrane is pulled inwards due to negative middle ear pressure, which would make it appear concave rather than convex. *Lateral process of malleus becomes more prominent* - This is a classic sign of a **retracted tympanic membrane**, as the membrane is pulled inwards towards the middle ear space, making the underlying bony structures, such as the lateral process of the malleus, more visible and distinct. - The inward pulling tension accentuates these anatomical landmarks. *Cone of light is absent or interrupted* - The **cone of light**, or light reflex, is normally a bright, triangular reflection on the anterior-inferior quadrant of the tympanic membrane. - In a retracted tympanic membrane, the abnormal curvature and tension can distort or obliterate this reflection, making it appear absent, interrupted, or diffused. *Handle of malleus appears shortened* - This is another typical finding in a **retracted tympanic membrane**, where the inward retraction causes the handle of malleus to appear foreshortened due to the altered angle and position of the membrane. - The normal anatomical landmarks become distorted by the negative middle ear pressure.

Q: Paracusis Willisii is seen in:

Otosclerosis. *CSOM* - **Chronic Suppurative Otitis Media (CSOM)** involves chronic infection and discharge from the middle ear, usually with a tympanic membrane perforation. - While it causes **conductive hearing loss**, it typically does not present with Paracusis Willisii; hearing loss is generally worse in noisy environments due to the masking effect of noise. *ASOM* - **Acute Suppurative Otitis Media (ASOM)** is an acute infection of the middle ear, usually characterized by pain, fever, and a bulging tympanic membrane. - It causes fluctuating **conductive hearing loss** acutely, but Paracusis Willisii is not a characteristic symptom. ***Otosclerosis*** - **Paracusis Willisii** is a classic symptom of otosclerosis, where the patient hears better in noisy environments. - This phenomenon occurs because others raise their voices in noisy environments, which helps the patient with **conductive hearing loss** to hear more clearly. - The stapes fixation in otosclerosis impairs normal air conduction, but when ambient noise forces people to speak louder, the increased sound intensity compensates for the conductive deficit. *Meniere's disease* - **Meniere's disease** is characterized by episodic vertigo, fluctuating sensorineural hearing loss, tinnitus, and aural fullness. - The hearing loss in Meniere's is typically **sensorineural**, and Paracusis Willisii is not associated with this condition; patients often experience increased sensitivity to loud sounds (recruitment).

Q: What is the most common age of presentation for otosclerosis?

20-30 years. ***20-30 years*** - Otosclerosis typically manifests in young to middle-aged adults, with the **onset of symptoms most common in the second and third decades of life**. - While diagnosis can occur later, the **progressive conductive hearing loss usually begins in this age range**. *5-10 years* - This age range is generally **too young** for the typical presentation of otosclerosis. - Hearing loss in this age group is more commonly associated with **otitis media** or congenital factors. *10-20 years* - While otosclerosis can begin to manifest in the late teens, the **peak incidence** for symptomatic presentation usually occurs slightly later. - This period is more commonly associated with early signs of genetic hearing loss or noise-induced hearing damage. *30-45 years* - While the condition can continue to progress and be diagnosed in this age range, the **initial appearance of symptoms often predates this period**. - This age range represents a later stage of progression for many individuals with otosclerosis.

Q: A 40-year-old woman presents with a three-day history of irritation, pain, and watery discharge from her left ear. She has recently returned from a holiday, during which she used her towel, artificial nails, and earbuds to alleviate itching in her ear. What is the likely diagnosis?

Otitis Externa. ***Otitis Externa*** - The patient's history of manipulating her ear with foreign objects like **artificial nails** and **earbuds**, especially when combined with a recent holiday (often involving swimming), strongly suggests **otitis externa**. - Symptoms such as **irritation, pain**, and **watery discharge** localized to the external ear canal are classic presentations, often exacerbated by a breach in the protective **skin barrier** of the canal. *Mastoiditis* - This is an **infection of the mastoid bone** behind the ear, typically presenting with postauricular pain, swelling, and fever. - It usually occurs as a complication of **untreated acute otitis media**, which is not indicated by the patient's symptoms or history. *ASOM* - **Acute Suppurative Otitis Media (ASOM)** involves **middle ear infection**, characterized by ear pain, fever, and a bulging **tympanic membrane**. - The symptoms described are more consistent with an external ear canal issue, and there is no mention of systemic symptoms or significant middle ear involvement. *Trigeminal Neuralgia* - This condition involves **severe, sudden, shock-like facial pain** along the distribution of the trigeminal nerve. - It does not cause ear discharge, irritation, or persistent ear pain that would be associated with local trauma or infection.

Q: Which of the following is NOT a feature of a moderately retracted tympanic membrane?

Presence of fluid in the middle ear. ***Presence of fluid in the middle ear*** - While fluid in the middle ear may **coexist** with a retracted tympanic membrane, it is **not a direct otoscopic feature of the membrane's retraction itself**. - The presence of fluid represents a **middle ear pathology** (otitis media with effusion) that may result from the same underlying cause (Eustachian tube dysfunction) but is a **separate finding** from the physical appearance changes of the retracted membrane. - The question asks specifically about features of the **retracted tympanic membrane**, not associated middle ear conditions. - Therefore, fluid presence is **NOT a feature of TM retraction**, but rather a concurrent or consequent pathology. *Handle of malleus appears foreshortened* - As the tympanic membrane retracts inward due to **negative middle ear pressure**, the handle of the malleus is pulled medially and appears **shorter and more horizontal** than normal. - This is a **classic direct sign** of tympanic membrane retraction seen on otoscopy. *Cone of light is absent or interrupted* - Retraction alters the **normal concave curvature** of the tympanic membrane, disrupting the light reflection from the otoscope. - The cone of light becomes **dimmed, distorted, or completely absent**, indicating loss of normal membrane contour. - This is a **direct otoscopic feature** of membrane retraction. *Lateral process of malleus becomes more prominent* - As the membrane is pulled inward, the **lateral process of the malleus** becomes more visible and appears **sharper and more pronounced**. - This bony landmark stands out more due to the **increased inward displacement** and altered membrane tension. - This is a **direct sign** of tympanic membrane retraction.

Q: Which of the following tests assesses resistance in the middle ear?

Impedance audiometry. ***Impedance audiometry*** - This test measures the **impedance** (resistance) of the middle ear and the mobility of the **tympanic membrane** and **ossicular chain** - It also assesses the **acoustic reflex**, which is the contraction of the middle ear muscles in response to loud sound, providing information about the middle ear and auditory pathways *Pure tone audiometry* - This test measures an individual's **hearing sensitivity** across different frequencies - It assesses the **thresholds of hearing** for air conduction and bone conduction, but does not directly measure middle ear resistance *Caloric test* - The caloric test evaluates the function of the **vestibular system** and the **horizontal semicircular canal** - It involves introducing warm or cold water/air into the ear canal to induce nystagmus, but does not assess middle ear resistance *BERA (Brainstem evoked response audiometry)* - BERA measures the **electrical activity** in the auditory pathway from the cochlea to the brainstem in response to auditory stimuli - It is used to assess hearing in infants, differentiate between **sensory** and **neural hearing loss**, and detect neurological disorders, but does not measure middle ear impedance

Q: Light house sign is seen in which stage of acute suppurative otitis media?

Stage of suppuration. ***Stage of suppuration*** - The **lighthouse sign** is observed when pus accumulates in the middle ear and perforates the tympanic membrane, resulting in pulsations of pus through the perforation which gives the appearance of a "lighthouse." - This stage is characterized by the formation and accumulation of **purulent exudate** and increased pressure within the middle ear. *Stage of hyperaemia* - This is the initial stage, characterized by **inflammation** and vascular congestion of the tympanic membrane, making it appear red. - There is no pus formation or perforation at this stage, so the lighthouse sign would not be present. *Stage of resolution* - This stage occurs after successful treatment or spontaneous healing, where the **inflammation subsides** and the tympanic membrane returns to normal appearance. - Perforation, if present, would be healing, and pus drainage, if any, would be minimal or absent. *Stage of perforation* - While perforation occurs during the stage of suppuration, the "lighthouse sign" specifically refers to the **pulsating discharge of pus** through the perforation. - The term "stage of perforation" is not typically used as a distinct stage in the progression of acute otitis media in the same way as hyperaemia or suppuration.

Question 1

Throat infection causes ear infection through:

Accepted Answer

Eustachian tube

Answer

Simultaneous infection

Answer

Hematogenous spread

Answer

Cranial spread

Question 2

Which of the following is NOT a feature of a moderately retracted tympanic membrane?

Accepted Answer

Tympanic membrane appears bulging outward

Answer

Lateral process of malleus becomes more prominent

Answer

Cone of light is absent or interrupted

Answer

Handle of malleus appears shortened

Question 3

Paracusis Willisii is seen in:

Accepted Answer

Otosclerosis

Answer

CSOM

Answer

ASOM

Answer

Meniere's disease

Question 4

What is the most common age of presentation for otosclerosis?

Accepted Answer

20-30 years

Answer

5-10 years

Answer

10-20 years

Answer

30-45 years

Question 5

A 40-year-old woman presents with a three-day history of irritation, pain, and watery discharge from her left ear. She has recently returned from a holiday, during which she used her towel, artificial nails, and earbuds to alleviate itching in her ear. What is the likely diagnosis?

Accepted Answer

Otitis Externa

Answer

Mastoiditis

Answer

ASOM

Answer

Trigeminal Neuralgia

Question 6

Which of the following is NOT a feature of a moderately retracted tympanic membrane?

Accepted Answer

Presence of fluid in the middle ear

Answer

Handle of malleus appearance foreshortened

Answer

Cone of light is absent or interrupted

Answer

Lateral process of malleus becomes more prominent

Question 7

Which of the following tests assesses resistance in the middle ear?

Accepted Answer

Impedance audiometry

Answer

Pure tone audiometry

Answer

Caloric test

Answer

BERA (Brainstem evoked response audiometry)

Question 8

A 40-year-old man presents to the general medicine clinic with progressive hearing loss in his right ear, difficulty hearing conversations in noisy places, and occasional ringing in his right ear. He denies any associated symptoms and has a normal otoscopic examination. A Weber's test is performed, and the patient reports hearing the vibration loudest in his left ear. Which of the following findings would most likely be observed in this patient?

Accepted Answer

Air conduction is greater than bone conduction in his right ear

Answer

Air conduction equals bone conduction in his right ear

Answer

Air conduction equals bone conduction in his left ear

Answer

Bone conduction is greater than air conduction in his left ear

Question 9

Which of the following statements regarding traumatic facial nerve palsy is false?

Accepted Answer

Usually occurs with longitudinal petrous temporal bone fracture

Answer

Posttraumatic facial nerve palsy may be complete at the time of presentation

Answer

Decompression of the canal can be useful treatment

Answer

Usually occurs with transverse petrous temporal bone fracture

Question 10

Light house sign is seen in which stage of acute suppurative otitis media?

Accepted Answer

Stage of suppuration

Answer

Stage of hyperaemia

Answer

Stage of resolution

Answer

Stage of perforation

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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