Diseases of the Ear Practice Questions

Q: Hemorrhagic external otitis media is caused by:

Influenza. ### Explanation **Hemorrhagic External Otitis (Otitis Externa Hemorrhagica)**, also known as **Bullous Myringitis**, is a specific viral infection characterized by the formation of blood-filled vesicles (bullae) on the tympanic membrane and the deep external auditory canal. **Why Influenza is Correct:** The primary causative agent is the **Influenza virus** (most commonly associated with epidemics). The condition often follows an upper respiratory tract infection. The virus causes localized inflammation and serosanguinous fluid accumulation between the layers of the tympanic membrane, leading to severe, throbbing ear pain (otalgia) that subsides once the bullae rupture. **Why Other Options are Incorrect:** * **B, C, and D (Proteus, Staphylococcus, Streptococcus):** These are common **bacterial** pathogens. While they cause typical Acute Otitis Media (AOM) or Otitis Externa (Swimmer's ear), they typically present with purulent (pus-forming) discharge and diffuse inflammation rather than the classic hemorrhagic bullae seen in viral infections. *Staphylococcus aureus* is the most common cause of furunculosis (localized otitis externa), while *Proteus* is often associated with chronic suppurative otitis media (CSOM). **NEET-PG High-Yield Pearls:** * **Clinical Presentation:** Sudden onset of excruciating pain followed by serosanguinous (bloody) ear discharge upon bulla rupture. * **Key Finding:** Hemorrhagic bullae on the tympanic membrane. * **Management:** Treatment is primarily symptomatic (analgesics). Antibiotics are only indicated if a secondary bacterial infection is suspected. * **Differential Diagnosis:** Always rule out **ASOM (Acute Suppurative Otitis Media)**; however, in bullous myringitis, the hearing loss is usually minimal unless the middle ear is also involved. * **Associated Finding:** Occasionally associated with sensorineural hearing loss (SNHL) or facial palsy if the virus affects the inner ear or cranial nerves.

Q: What is the alternative name for the pars flaccida of the tympanic membrane?

Shrapnel's membrane. ### Explanation The tympanic membrane is divided into two distinct anatomical parts: the **Pars Tensa** and the **Pars Flaccida**. **Why the correct answer is right:** * **Pars Flaccida (Shrapnel’s Membrane):** This is the small, triangular, superior portion of the tympanic membrane located above the anterior and posterior malleolar folds (in the Notch of Rivinus). Unlike the pars tensa, it lacks a well-developed middle fibrous layer (lamina propria), making it "flaccid." It is named after **Henry Jones Shrapnell**, who first described it. **Analysis of Incorrect Options:** * **A. Reissner's Membrane:** Also known as the vestibular membrane, it is a thin layer inside the cochlea that separates the Scala Media from the Scala Vestibuli. * **C. Basilar Membrane:** A structural element within the cochlea that separates the Scala Media from the Scala Tympani and supports the Organ of Corti. * **D. Secondary Tympanic Membrane:** This is the membrane that covers the **round window** (fenestra rotunda), separating the middle ear from the Scala Tympani of the inner ear. **High-Yield Clinical Pearls for NEET-PG:** 1. **Layers:** The Pars Flaccida lacks the organized circular and radial fibrous layers found in the Pars Tensa. 2. **Cholesteatoma:** The Pars Flaccida is the most common site for the formation of **retraction pockets**, which are the precursors to primary acquired cholesteatoma. 3. **Prussak’s Space:** This is a small recess located medial to the Pars Flaccida; it is the initial site of cholesteatoma development in most cases. 4. **Blood Supply:** It is more vascular than the pars tensa, which is why it may appear slightly pinker during otoscopy.

Q: A young male presents with ear discharge for three years and recently developed swelling in the neck below and behind the angle of the mandible. On examination, the external auditory canal was filled with granulation tissue. What is the diagnosis?

Bezold's abscess. ### Explanation The clinical presentation of chronic ear discharge, granulation tissue in the canal (suggestive of cholesteatoma), and a neck swelling below and behind the angle of the mandible points to a complication of **Chronic Suppurative Otitis Media (CSOM)**. **Why Bezold’s Abscess is Correct:** Bezold’s abscess occurs when pus from a perforated mastoid tip (where the bone is thin) tracks down along the **sternocleidomastoid (SCM) muscle**. Because the mastoid tip is the site of origin for the SCM and the posterior belly of the digastric muscle, the pus is directed deep into the neck. This results in a painful inflammatory swelling situated **below and behind the angle of the mandible**, often causing torticollis. **Analysis of Incorrect Options:** * **Luc’s Abscess:** This is a subperiosteal abscess where pus tracks through the external auditory canal wall. The swelling is typically located in the **meatal wall** or pre-auricular region, not the neck. * **Citelli’s Abscess:** Pus tracks through the digastric fossa along the **posterior belly of the digastric muscle** to the occipital bone/digastric triangle. It is located more posteriorly and superiorly compared to Bezold's. * **Parapharyngeal Abscess:** While it can occur as a complication of ear infections (via the infratemporal fossa), it typically presents with trismus, medial displacement of the tonsil, and swelling at the angle of the jaw, rather than tracking down the SCM. **High-Yield Clinical Pearls for NEET-PG:** * **Mastoid Tip Anatomy:** In children under 2 years, the mastoid tip is not developed; hence, Bezold’s abscess is rare in infants. * **Radiology:** Contrast-enhanced CT (CECT) is the gold standard to visualize the mastoid breakdown and the extent of the neck abscess. * **Management:** Requires a combination of Cortical/Radical Mastoidectomy (to clear the source) and incision and drainage (I&D) of the neck abscess.

Q: What is true in case of perforation of the pars flaccida?

It is associated with cholesteatoma.. **Explanation:** Perforations of the tympanic membrane are clinically divided based on their location: **Pars Tensa** (associated with mucosal disease) and **Pars Flaccida** (associated with squamosal disease). **1. Why Option B is Correct:** The pars flaccida (Shrapnell’s membrane) lacks a robust fibrous middle layer (the *annulus tympanicus* is absent here). This makes it more prone to retraction when there is negative middle ear pressure. A retraction pocket in the pars flaccida is the most common site for the development of **Primary Acquired Cholesteatoma**. As keratin debris accumulates within this pocket, it forms a cholesteatoma, which can erode the scutum and the ossicles (specifically the head of the malleus and body of the incus). **2. Why other options are incorrect:** * **Option A:** Chronic Suppurative Otitis Media (CSOM) is actually the **primary cause** of pars flaccida perforations. Specifically, the "Attico-antral" or "Unsafe" type of CSOM is characterized by disease in the attic/pars flaccida region. * **Option C:** Traumatic perforations (due to a slap, water sports, or instrumentation) almost exclusively involve the **pars tensa**, as it constitutes the largest surface area of the drum. Pars flaccida perforations are nearly always pathological (inflammatory/cholesteatomatous) rather than traumatic. **Clinical Pearls for NEET-PG:** * **Safe vs. Unsafe:** Pars tensa perforations (Central) are "Safe" (low risk of bone erosion); Pars flaccida/Marginal perforations are "Unsafe" (high risk of cholesteatoma). * **Prussak’s Space:** This is the most common initial site for cholesteatoma formation, located lateral to the neck of the malleus and medial to the pars flaccida. * **Management:** Unlike central perforations which may be managed medically, pars flaccida disease usually requires surgical intervention (Mastoidectomy).

Q: A 5-year-old child is brought to the outpatient department by his mother with irritability, poor school performance, and a history of recurrent ear infections. Otoscopic examination shows a dull, retracted tympanic membrane with fluid behind it. There is no blood clot present in the ear. What is the most likely diagnosis?

Otitis media with effusion. ***Otitis media with effusion***- This condition is characterized by the presence of **non-purulent fluid (effusion)** in the middle ear space without signs or symptoms of acute infection (such as fever or severe pain).- The otoscopic findings of a **dull, retracted tympanic membrane** with fluid behind it, coupled with symptoms suggesting chronic hearing loss (**poor school performance** and irritability), are classic for OME, or "**glue ear**." *Acute otitis media*- AOM is generally associated with the acute onset of **otalgia** (ear pain) and often fever, along with a key otoscopic finding of a **bulging**, erythematous, and immobile **tympanic membrane**.- The absence of acute inflammatory signs and the description of a retracted, rather than bulging, TM distinguishes this chronic finding from an acute infection. *Otitis externa*- This condition involves inflammation and infection of the **external auditory canal**; the middle ear and the fluid described are not typically affected.- Key clinical findings involve tenderness upon manipulation of the **tragus** or **pinna**, often with swelling and exudate limited to the ear canal. *Cholesteatoma*- Cholesteatoma is a destructive process involving a collection of **squamous epithelium** (a “pearly mass”) that usually causes **foul-smelling chronic otorrhea** due to bone erosion.- While chronic retraction of the TM can lead to its formation, the primary finding here is simply **effusion (fluid)**, not the characteristic highly destructive epidermal mass.

Q: A 60-year-old man complains of gradual hearing loss over several years. He reports difficulty hearing conversations, especially in noisy environments, and has trouble perceiving high-pitched sounds. There are no episodes of vertigo, tinnitus, or ear fullness. What is the most likely diagnosis?

Presbycusis. ***Correct: Presbycusis*** - It is the most common cause of **gradual, bilateral sensorineural hearing loss** in the elderly, characterized by a protracted course over several years. - The defining feature is difficulty hearing **high-pitched sounds** (loss of high-frequency hearing) and **poor speech discrimination** in noisy environments, consistent with the clinical picture. - This is age-related cochlear degeneration, typically beginning after age 50-60. *Incorrect: Meniere's disease* - This condition is defined by the classic triad of **episodic vertigo**, **fluctuating (usually low-frequency) sensorineural hearing loss**, and **tinnitus** with aural fullness, none of which are present. - The hearing loss is typically episodic and unilateral, contrasting with the patient's chronic, gradual deterioration. *Incorrect: Otosclerosis* - This disorder causes **conductive hearing loss** (or mixed loss) due to abnormal bone growth around the **stapes footplate**, often presenting earlier in life (20s–30s). - Unlike the gradual, high-frequency loss seen here, otosclerosis causes reduced sound transmission to the inner ear, typically improving speech perception in noise (**paracusis Willisii**). *Incorrect: Acoustic neuroma* - Although it causes sensorineural hearing loss, it is typically **unilateral** and often asymmetrical, frequently accompanied by **unilateral tinnitus** and imbalance. - This diagnosis is less likely in a patient with **bilateral**, gradual hearing loss without unilateral symptoms or specific cranial nerve involvement.

Q: The image below shows a lateral view of the face with a highlighted region in front of the ear. Which type of abscess is most likely indicated in this area?

Luc's abscess. ***Luc's abscess*** - This is a **subperiosteal abscess** located in the **preauricular region**, on the external surface of the squamous part of the temporal bone, which corresponds to the highlighted area. - It is a rare complication of **acute otitis media** or **mastoiditis**, occurring when infection spreads through the tympanosquamous suture. *Citelli’s abscess* - This abscess is located at the **tip of the mastoid process** and extends into the **digastric triangle** of the neck, which is posterior and inferior to the area shown. - It is formed when pus from mastoiditis tracks along the posterior belly of the **digastric muscle**. *Bezold's abscess* - This is a **deep neck abscess** that forms when infection erodes through the medial aspect of the mastoid tip and spreads inferiorly into the neck. - The swelling is located deep to the **sternocleidomastoid muscle**, far from the preauricular location shown in the image. *Zygomatic abscess* - This abscess forms over the **zygomatic process** of the temporal bone, which is located superior and anterior to the external auditory canal. - It results from the spread of infection from mastoid air cells into the **root of the zygoma**, a location slightly more superior than what is highlighted.

Question 1

All of the following are true regarding foreign body impaction in the ear, except:

Accepted Answer

Syringing is used for the removal of vegetative foreign bodies.

Answer

Objects located medial to the isthmus of the ear canal are difficult to remove.

Answer

Syringing uses room temperature water.

Answer

A blunt hook is used to remove rounded foreign bodies.

Question 2

Hemorrhagic external otitis media is caused by:

Accepted Answer

Influenza

Answer

Proteus

Answer

Staphylococcus

Answer

Streptococcus

Question 3

What is the alternative name for the pars flaccida of the tympanic membrane?

Accepted Answer

Shrapnel's membrane

Answer

Reissner's membrane

Answer

Basilar membrane

Answer

Secondary tympanic membrane

Question 4

A child presents with barotrauma pain. There is no inflammation of the middle ear. What is the appropriate management?

Accepted Answer

Suppurative management

Answer

Antibiotics

Answer

Paracetamol

Answer

Grommet tube insertion

Question 5

An elderly diabetic patient presents with excruciating ear pain, granulation tissue in the ear canal, and signs of skull base infection including facial paralysis. What is the recommended treatment?

Accepted Answer

Penicillin

Answer

Ciprofloxacin

Answer

Second-generation cephalosporin

Answer

Erythromycin

Question 6

A young male presents with ear discharge for three years and recently developed swelling in the neck below and behind the angle of the mandible. On examination, the external auditory canal was filled with granulation tissue. What is the diagnosis?

Accepted Answer

Bezold's abscess

Answer

Luc's abscess

Answer

Citelli's abscess

Answer

Parapharyngeal abscess

Question 7

What is true in case of perforation of the pars flaccida?

Accepted Answer

It is associated with cholesteatoma.

Answer

Chronic suppurative otitis media is a rare cause.

Answer

It is usually due to trauma.

Answer

All of the above.

Question 8

A 5-year-old child is brought to the outpatient department by his mother with irritability, poor school performance, and a history of recurrent ear infections. Otoscopic examination shows a dull, retracted tympanic membrane with fluid behind it. There is no blood clot present in the ear. What is the most likely diagnosis?

Accepted Answer

Otitis media with effusion

Answer

Acute otitis media

Answer

Otitis externa

Answer

Cholesteatoma

Question 9

A 60-year-old man complains of gradual hearing loss over several years. He reports difficulty hearing conversations, especially in noisy environments, and has trouble perceiving high-pitched sounds. There are no episodes of vertigo, tinnitus, or ear fullness. What is the most likely diagnosis?

Accepted Answer

Presbycusis

Answer

Meniere’s disease

Answer

Otosclerosis

Answer

Acoustic neuroma

Question 10

The image below shows a lateral view of the face with a highlighted region in front of the ear. Which type of abscess is most likely indicated in this area?

Accepted Answer

Luc's abscess

Answer

Zygomatic abscess

Answer

Bezold's abscess

Answer

Citelli’s abscess

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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