Diseases of the Ear Practice Questions

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: 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: 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: 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: A 5-year-old boy presents with ear pain and fever. The left eardrum is inflamed with a small perforation, and pus is seen in the external canal. A swab of the area grows Streptococcus pneumoniae. Which of the following is the most likely mechanism for Streptococcus pneumoniae to cause otitis media?

direct extension from the nasopharynx. ***direct extension from the nasopharynx*** - *Streptococcus pneumoniae* commonly colonizes the **nasopharynx**, especially in children. - In children, the **Eustachian tube** is shorter, wider, and more horizontal, allowing bacteria to easily ascend from the nasopharynx into the middle ear. *hematogenous spread* - **Hematogenous spread** (spread through the bloodstream) is a rare mechanism for otitis media and is more characteristic of systemic infections or specific pathogens not typically associated with common acute otitis media. - The localized symptoms and presence of a perforation with pus are more consistent with a local infection spreading via a contiguous route. *direct inoculation on the ear* - **Direct inoculation** would imply an external injury or foreign body introducing bacteria directly into the middle ear, which is not suggested by the clinical presentation. - Otitis media typically originates from infections within the body, not external contamination of the ear itself. *spread through lymphatic tissue* - While lymphatic drainage occurs, **lymphatic spread** is not the primary mechanism for bacteria to reach the middle ear and cause otitis media. - The direct anatomical connection of the Eustachian tube offers a more direct and common pathway for infection.

Q: What is the treatment of choice for atticoantral type of chronic suppurative otitis media?

Modified radical mastoidectomy. ***Modified radical mastoidectomy*** - This procedure is the treatment of choice for **atticoantral type of chronic suppurative otitis media (CSOM)** due to the presence of **cholesteatoma**, which requires complete surgical removal. - It involves removing the posterior and superior canal wall, exenterating the mastoid air cells, and exteriorizing the **aditus and antrum** into the external auditory canal to create a common cavity. - Unlike radical mastoidectomy, it **attempts to preserve the tympanic membrane and ossicular chain when disease extent permits**, thereby maintaining the middle ear transformer mechanism and optimizing hearing outcomes. *Antibiotics* - While antibiotics may be used to manage acute exacerbations or infections, they cannot eradicate the inherent **cholesteatoma** found in atticoantral CSOM. - They primarily target bacteria and have no effect on the **pathological skin growth** that characterizes cholesteatoma. *Tympanoplasty* - **Tympanoplasty** is a reconstructive procedure primarily used for repairing a **perforated tympanic membrane** or ossicular chain defects, typically in the tubotympanic type of CSOM. - It does not address the fundamental problem of **cholesteatoma** and its destructive potential in atticoantral disease. *None of the options* - This is incorrect because **modified radical mastoidectomy** is a well-established and effective treatment for atticoantral CSOM. - Omitting treatment would lead to progressive destruction of middle ear structures and potentially life-threatening complications.

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.

Q: A 60-year-old diabetic patient presents with an extremely painful lesion in the external ear and otorrhea that is not responding to antibiotics, accompanied by granulation-type tissue in the external ear, bony erosion, and facial nerve palsy. The most likely diagnosis is

Malignant otitis externa. **Malignant otitis externa** - The combination of **severe ear pain**, **granulation tissue** in the external ear, **bony erosion**, **facial nerve palsy**, and unresponsiveness to antibiotics in a **diabetic patient** is highly characteristic of malignant otitis externa. - This aggressive infection, typically caused by *Pseudomonas aeruginosa*, can spread from the external auditory canal to the surrounding bone and soft tissues, leading to cranial nerve involvement. *Nasopharyngeal carcinoma* - While nasopharyngeal carcinoma can cause cranial nerve palsies due to local invasion, it typically presents with symptoms such as **nasal obstruction**, **epistaxis**, or **unilateral serous otitis media** due to Eustachian tube obstruction. - It would not typically manifest with severe external ear pain, otorrhea, or visible granulation tissue in the external auditory canal. *Chronic suppurative otitis media* - Chronic suppurative otitis media is characterized by **persistent ear discharge** through a tympanic membrane perforation and can lead to **cholesteatoma** formation. - While it can cause bony erosion and, in advanced cases, facial nerve palsy, it is less likely to present with the severe external ear pain and granulation tissue pattern described in this diabetic patient, who is more susceptible to aggressive external ear infections. *Acute suppurative otitis media* - Acute suppurative otitis media is an infection of the **middle ear**, typically presenting with ear pain, fever, and a **bulging tympanic membrane**. - It does not involve granulation tissue in the external ear, bony erosion, or facial nerve palsy as initial symptoms, and it primarily affects the middle ear cavity, not the external auditory canal or surrounding bone.

Q: An old diabetic male presented with rapidly spreading infection of the external auditory canal with involvement of the bone and presence of granulation tissue. The drug of choice for this condition is:

Ciprofloxacin. ***Ciprofloxacin*** - This clinical presentation describes **necrotizing otitis externa (NOE)**, a severe infection predominantly caused by **Pseudomonas aeruginosa**. - **Ciprofloxacin** is the drug of choice due to its excellent anti-pseudomonal activity and good tissue penetration, necessary to treat the extensive infection involving bone. *Penicillin* - **Penicillin** has limited activity against **Pseudomonas aeruginosa**, which is the primary pathogen in necrotizing otitis externa, making it ineffective. - Its spectrum of activity is primarily against gram-positive bacteria and some gram-negative cocci, not the specific atypical gram-negative rods causing this infection. *Second generation cephalosporin* - **Second-generation cephalosporins** generally lack sufficient anti-pseudomonal coverage to effectively treat necrotizing otitis externa. - While they offer broader gram-negative coverage than first-generation agents, they are typically not robust enough for severe Pseudomonas infections, especially those involving bone. *Aminoglycosides* - **Aminoglycosides** are potent against Pseudomonas aeruginosa but are generally administered parenterally and are associated with significant **ototoxicity** and **nephrotoxicity**. - While effective, their side effect profile and the availability of equally effective and safer oral options like ciprofloxacin make them less favorable as a first-line monotherapy for NOE.

Question 1

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 2

Paracusis Willisii is seen in:

Accepted Answer

Otosclerosis

Answer

CSOM

Answer

ASOM

Answer

Meniere's disease

Question 3

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 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

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 6

A 5-year-old boy presents with ear pain and fever. The left eardrum is inflamed with a small perforation, and pus is seen in the external canal. A swab of the area grows Streptococcus pneumoniae. Which of the following is the most likely mechanism for Streptococcus pneumoniae to cause otitis media?

Accepted Answer

direct extension from the nasopharynx

Answer

spread through lymphatic tissue

Answer

direct inoculation on the ear

Answer

hematogenous spread

Question 7

What is the treatment of choice for atticoantral type of chronic suppurative otitis media?

Accepted Answer

Modified radical mastoidectomy

Answer

Tympanoplasty

Answer

Antibiotics

Answer

None of the options

Question 8

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

Question 9

A 60-year-old diabetic patient presents with an extremely painful lesion in the external ear and otorrhea that is not responding to antibiotics, accompanied by granulation-type tissue in the external ear, bony erosion, and facial nerve palsy. The most likely diagnosis is

Accepted Answer

Malignant otitis externa

Answer

Nasopharyngeal carcinoma

Answer

Chronic suppurative otitis media

Answer

Acute suppurative otitis media

Question 10

An old diabetic male presented with rapidly spreading infection of the external auditory canal with involvement of the bone and presence of granulation tissue. The drug of choice for this condition is:

Accepted Answer

Ciprofloxacin

Answer

Second generation cephalosporin

Answer

Penicillin

Answer

Aminoglycosides

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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