Otologic and Neurotologic Emergencies Practice Questions

Q: A patient presents with facial nerve palsy following head trauma with fracture of the mastoid. What is the best intervention?

Immediate decompression. **Explanation:** The management of post-traumatic facial nerve palsy depends primarily on the **onset** and **severity** of the paralysis. **1. Why "Immediate Decompression" is correct:** In the context of head trauma (like a mastoid/temporal bone fracture), **immediate-onset complete paralysis** suggests a mechanical injury such as nerve transection, compression by a bone fragment, or an intraneural hematoma. In these cases, surgical exploration and decompression (with or without nerve grafting) are indicated to prevent permanent axonal degeneration and provide the best chance for functional recovery. **2. Why the other options are incorrect:** * **Wait and watch:** This is only appropriate for **delayed-onset** or **incomplete** palsy, where the prognosis for spontaneous recovery is excellent (90-100%). * **Facial sling:** This is a static rehabilitative procedure used for long-standing, permanent facial paralysis to improve symmetry at rest. It is not an acute intervention. * **Steroids:** While steroids are the mainstay for Bell’s palsy and delayed-onset traumatic palsy (to reduce edema), they cannot resolve mechanical impingement or transection caused by a fracture. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of injury:** The **Geniculate ganglion** (perigeniculate area) is the most common site of facial nerve injury in temporal bone fractures. * **Longitudinal vs. Transverse Fractures:** Longitudinal fractures (80%) are more common, but Transverse fractures (20%) have a higher incidence (50%) of facial nerve involvement. * **Diagnostic Tool:** High-resolution CT (HRCT) of the temporal bone is the gold standard for identifying fracture lines and nerve impingement. * **Electrodiagnostic tests:** Nerve Excitability Test (NET) or Electroneuronography (ENoG) are used to monitor degeneration; >90% degeneration within 14 days is an indication for surgery.

Q: What is the commonest cause of brain abscess?

Chronic suppurative otitis media (CSOM). **Explanation:** **Chronic Suppurative Otitis Media (CSOM)** is the most common cause of brain abscess worldwide, particularly in developing countries. This occurs due to the direct extension of infection from the middle ear cleft or mastoid air cells into the intracranial cavity [3], [4]. * **Why CSOM is the correct answer:** In the context of otogenic brain abscess, the infection typically spreads via **retrograde thrombophlebitis** or **direct bone erosion** (often associated with cholesteatoma) [1]. The most common sites for otogenic brain abscess are the **temporal lobe** (via the tegmen tympani) and the **cerebellum** (via Trautmann’s triangle) [4]. **Analysis of Incorrect Options:** * **Pyogenic Meningitis:** While meningitis is a common intracranial complication of ear infections, it is usually a *result* of the spread of infection rather than the primary *cause* of a focal brain abscess [1]. * **Trauma:** Penetrating head injuries or compound skull fractures can introduce pathogens directly into the brain parenchyma, but statistically, this accounts for a much smaller percentage of cases compared to chronic infections. * **Chronic Sinusitis:** This is the second most common source of intracranial suppuration. Frontal or ethmoid sinusitis typically leads to abscesses in the **frontal lobe**, but CSOM remains more frequent overall. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Temporal lobe > Cerebellum [4]. * **Most common organism:** Often polymicrobial; *Proteus mirabilis* is frequently implicated in otogenic cases, alongside *Staphylococcus aureus* and anaerobes [3]. * **Investigation of choice:** Contrast-enhanced CT (CECT) or MRI (shows a classic **ring-enhancing lesion**) [4]. * **Management:** Requires a multidisciplinary approach involving neurosurgical drainage and a radical mastoidectomy to remove the source of infection [2], [3].

Q: A 22-year-old male presents to the emergency room after sustaining a facial injury from being punched. The patient was conscious, and bleeding from the right ear was controlled at that time. The next day, audiometry showed conductive hearing loss. What type of temporal bone fracture does the patient likely have?

Longitudinal. **Explanation:** Temporal bone fractures are traditionally classified based on the relationship of the fracture line to the long axis of the petrous part of the temporal bone. **1. Why Longitudinal is Correct:** Longitudinal fractures are the most common type (80%) and typically result from **lateral blows** (temporoparietal trauma), such as a punch to the side of the head. * **Hearing Loss:** They characteristically cause **Conductive Hearing Loss (CHL)** due to ossicular chain disruption (most commonly incudostapedial joint dislocation) or hemotympanum. * **Clinical Signs:** They are associated with **bleeding from the ear** (due to laceration of the external auditory canal skin and tympanic membrane rupture). Facial nerve palsy is less common (20%) and usually delayed in onset. **2. Why Incorrect Options are Wrong:** * **Transverse:** These result from frontal or occipital trauma. They typically cause **Sensorineural Hearing Loss (SNHL)** and severe vertigo due to involvement of the bony labyrinth. Facial nerve palsy is very common (50%) and often immediate. Bleeding from the ear is usually absent as the tympanic membrane remains intact (hemotympanum may be present). * **Oblique/Mixed:** While many fractures are technically "mixed" in clinical practice, for exam purposes, the classic distinction between longitudinal (CHL + Bleeding) and transverse (SNHL + Vertigo) is the primary focus. **High-Yield Clinical Pearls for NEET-PG:** * **Most common ossicular injury:** Incudostapedial joint dislocation. * **Battle’s Sign:** Post-auricular ecchymosis indicating a mastoid fracture (base of skull). * **CSF Otorrhea:** More common in longitudinal fractures; **CSF Rhinorrhea** (via Eustachian tube) can occur if the TM is intact. * **Management:** Most facial nerve palsies in longitudinal fractures are managed conservatively (steroids) as they are often due to edema (delayed onset). Immediate palsy usually requires surgical exploration.

Q: A patient presents with scanty, foul-smelling discharge from the middle ear, accompanied by fever, headache, and neck rigidity. CT of the temporal lobe reveals a localized ring-enhancing lesion. Which of the following is the least likely cause of this condition?

H. influenza. **Explanation:** The clinical presentation of scanty, foul-smelling discharge suggests **Chronic Suppurative Otitis Media (CSOM) – Atticoantral type (Cholesteatoma)**. The development of fever, headache, neck rigidity, and a ring-enhancing lesion on CT indicates an intracranial complication, specifically an **Otogenic Brain Abscess** (most commonly located in the temporal lobe or cerebellum). **Why H. influenzae is the correct (least likely) answer:** * **H. influenzae** and **S. pneumoniae** are the most common pathogens in *Acute* Otitis Media (AOM). While AOM can lead to meningitis, it rarely causes a localized brain abscess. * In contrast, **Otogenic Brain Abscess** arises from chronic infections (CSOM). The microbiology of CSOM-related abscesses is typically **polymicrobial**, involving anaerobic bacteria and specific Gram-negative/positive aerobes. *H. influenzae* is almost never isolated from chronic cholesteatomatous lesions or their intracranial extensions. **Analysis of other options:** * **S. aureus (Option A):** A very common aerobic isolate in CSOM and a frequent cause of skin/soft tissue-related intracranial abscesses. * **Pseudomonas (Option B):** The most common aerobic organism found in CSOM. It is highly invasive and frequently implicated in otogenic intracranial complications. * **S. pneumoniae (Option C):** While more common in AOM, it remains a significant pathogen in chronic ear infections and is a well-known cause of intracranial spread. **NEET-PG High-Yield Pearls:** 1. **Most common site** for an otogenic brain abscess: **Temporal lobe** (followed by the Cerebellum). 2. **Route of spread:** Usually via bone erosion (Tegmen tympani) or retrograde thrombophlebitis. 3. **Investigation of choice:** Contrast-enhanced CT (shows ring enhancement) or MRI (more sensitive for early cerebritis). 4. **Microbiology:** Often includes anaerobes like *Bacteroides fragilis* and *Peptostreptococcus*.

Q: A patient presents with a history of fall and is found to have bleeding from the ear on examination. What is the investigation of choice?

CT Temporal bone. ***CT Temporal bone***- This is the **investigation of choice** for suspected **temporal bone fractures**, which are strongly suggested by **otorrhagia** (bleeding from the ear) following trauma.- CT provides superior resolution for visualizing the intricate bony anatomy of the temporal bone, allowing for the precise identification of fracture line extension (e.g., *longitudinal* or *transverse*) and related complications like **ossicular chain integrity** or **hemotympanum**.*CBC*- Complete Blood Count (CBC) is part of the initial trauma workup to assess general systemic status (e.g., potential **blood loss** or baseline hemoglobin), but it is not a diagnostic tool for identifying the source of bleeding (the anatomical injury).- It provides no structural information necessary to localize the injury or determine the presence of a **skull fracture**.*MRI Brain*- **MRI** is optimized for visualizing **soft tissue injury** (e.g., brain contusions, nerve damage) and is poor for detailing acute bony fractures, especially the fine structures of the temporal bone.- It may be used if profound neurological deficits or specific **intracranial injury** (e.g., vascular dissection or brain parenchymal damage) are suspected, but not as the primary diagnostic imaging for bony trauma.*X-ray Skull*- **Plain X-rays** lack the sensitivity and detail required to reliably capture the subtle, complex fractures of the **temporal bone** or skull base.- This method is largely superseded by **CT scans** for trauma evaluation due to high rates of **false negatives** regarding skull base injuries.

Q: The treatment of choice for a mastoid fracture with immediate complete facial nerve paralysis is

Nerve decompression. ***Nerve decompression*** - For a mastoid (temporal bone) fracture causing **facial nerve paralysis**, surgical **nerve decompression** is the treatment of choice when surgery is indicated. - Most cases of facial nerve paralysis from temporal bone fractures result from **nerve compression or edema** within the fallopian canal, not complete transection. - **Decompression** relieves pressure on the nerve, allowing recovery of function, and is performed via **mastoidectomy** to access the facial nerve in its intratemporal course. - Indications for surgical decompression include **immediate complete paralysis** with evidence of nerve degeneration on electrodiagnostic testing, or failed conservative management. *Mastoidectomy with nerve grafting* - **Nerve grafting** is reserved for cases where the facial nerve is **completely transected or severed**, which is rare in temporal bone fractures. - Most temporal bone trauma causes nerve injury from compression or hematoma, not complete anatomical discontinuity requiring grafting. - Grafting would only be considered after direct visualization confirms irreparable nerve transection. *Steroid therapy* - High-dose **corticosteroids** are actually the **first-line treatment** for facial nerve paralysis following temporal bone fractures, especially in cases of **delayed or incomplete paralysis**. - Steroids reduce **inflammation and edema** around the injured nerve and are often effective for **delayed-onset paralysis**. - However, they are typically used as conservative management rather than the definitive "treatment of choice" when immediate complete paralysis occurs. *Sling operation* - A **sling operation** (facial reanimation surgery) is used for **long-standing, irreversible facial paralysis** when nerve recovery is no longer possible. - It provides **static facial support** but does not restore nerve function. - This is not appropriate for acute management of traumatic facial nerve injury.

Q: Treatment of choice in complete traumatic facial nerve transection is:

Facial nerve repair. ***Facial nerve repair*** - In cases of **traumatic facial nerve injury** where there is a clear transection or significant damage, surgical repair (e.g., direct anastomosis or nerve grafting) is the gold standard to restore function. - The goal is to re-establish neural continuity as soon as possible to prevent **irreversible muscle denervation** and improve functional outcomes. *Facial sling* - A **facial sling** is a palliative procedure used for long-standing facial paralysis, often when nerve repair is not possible or has failed, to provide static support to the affected side of the face. - It does not address the underlying nerve damage or aim to restore active facial movement. *Conservative management* - **Conservative management** is appropriate for non-traumatic causes of facial palsy (e.g., Bell's palsy) or mild traumatic injuries where nerve continuity is presumed intact and swelling is the primary issue. - It involves observation and sometimes medication but does not repair a transected nerve. *Systemic corticosteroids* - **Systemic corticosteroids** are primarily used in inflammatory conditions causing facial nerve palsy, such as **Bell's palsy**, to reduce swelling and inflammation around the nerve. - They are not a treatment for direct physical damage or transection of the facial nerve due to trauma.

Q: Treatment of choice for CSOM with vertigo and facial nerve palsy is:

Immediate mastoid exploration. ***Immediate mastoid exploration*** - Vertigo and facial nerve palsy in the context of CSOM (Chronic Suppurative Otitis Media) indicate **intracranial complications** or significant **bone erosion** by the cholesteatoma, necessitating urgent surgical intervention. - **Mastoid exploration** allows for removal of the cholesteatoma, drainage of infection, and decompression of the facial nerve, preventing irreversible damage and life-threatening complications. *Myringoplasty* - This procedure involves **repairing the tympanic membrane** (eardrum) and is primarily performed for simple perforations without labyrinthine involvement or facial nerve complications. - It would not address the underlying pathology of **cholesteatoma erosion** or the serious symptoms of vertigo and facial nerve palsy. *Antibiotics and labyrinthine sedative* - While antibiotics may be part of the management for active infection, they alone cannot resolve an extensive **cholesteatoma** causing bone destruction and nerve compression. - **Labyrinthine sedatives** might temporarily relieve vertigo but do not treat the causative disease process, which requires surgical intervention. *Labyrinthectomy* - This procedure involves **destroying the labyrinth** to alleviate intractable vertigo, typically reserved for severe, unilateral Meniere's disease or non-functioning labyrinths. - It is a **destructive procedure** that would result in complete hearing loss and would not address the underlying **cholesteatoma** or the facial nerve palsy.

Q: A 68-year-old diabetic male presents with persistent ear discharge, fever, and headache. He complains of pain that is out of proportion. On examination, granulations and tenderness are observed on the floor of the external auditory canal, along with facial nerve palsy. He is not responding to antibiotics. What is the most probable diagnosis?

Malignant otitis externa. **Malignant otitis externa** - This condition presents with **persistent ear discharge**, **granulation tissue** in the external auditory canal, and **cranial nerve palsies** (like facial nerve palsy) in an immunocompromised patient (e.g., elderly diabetic). - The lack of response to antibiotics and severe pain are characteristic of this aggressive **osteomyelitis of the skull base**, often caused by *Pseudomonas aeruginosa*. *Malignant disease of middle ear* - While it can cause ear discharge and cranial nerve palsies, **granulation tissue** specifically on the floor of the **external auditory canal** is less typical. - Middle ear malignancy often presents with **otalgia**, hearing loss, and sometimes **hemorrhagic discharge**, which are not the primary features here. *Malignant disease of nasopharynx* - Nasopharyngeal malignancy typically causes symptoms like **nasal obstruction**, **epistaxis**, **cervical lymphadenopathy**, and **cranial nerve palsies** due to local invasion. - It would not primarily present with **granulation tissue in the external auditory canal** or persistent ear discharge originating from the ear itself. *Chronic otitis externa* - Although it involves persistent ear discharge and pain, **chronic otitis externa** typically does not cause **cranial nerve palsies** or significant **granulation tissue** in the absence of deeper invasion. - It refers to long-standing inflammation of the ear canal, usually without the systemic and invasive features seen in this case.

Q: Which of the following statements about malignant otitis externa is true?

Common in diabetics and old age. ***Common in diabetics and old age*** - **Malignant otitis externa** is an aggressive infection primarily affecting the external auditory canal and surrounding structures. - It most commonly occurs in **immunocompromised individuals**, especially **elderly diabetics**, due to impaired immune response and microvascular complications. *Not painful* - Malignant otitis externa is characterized by **severe, unrelenting otalgia (ear pain)** that often worsens at night and is disproportionate to the clinical findings. - The pain is due to the **inflammatory and destructive process** involving cartilage, bone, and nerves. *Caused by streptococcus* - The most common causative organism for malignant otitis externa is **Pseudomonas aeruginosa** (>90% of cases), not Streptococcus. - **Streptococcus species** are more commonly associated with acute otitis media or common skin infections. *Responds to topical antibiotics alone* - Malignant otitis externa requires **prolonged systemic antibiotic therapy** (typically 4-6 weeks of intravenous or oral fluoroquinolones like ciprofloxacin). - Topical antibiotics alone are **insufficient** due to the invasive nature of the infection, which extends beyond the external canal to involve bone and soft tissues.

Question 1

A patient presents with facial nerve palsy following head trauma with fracture of the mastoid. What is the best intervention?

Accepted Answer

Immediate decompression

Answer

Wait and watch

Answer

Facial sling

Answer

Steroids

Question 2

What is the commonest cause of brain abscess?

Accepted Answer

Chronic suppurative otitis media (CSOM)

Answer

Pyogenic meningitis

Answer

Trauma

Answer

Chronic sinusitis

Question 3

A 22-year-old male presents to the emergency room after sustaining a facial injury from being punched. The patient was conscious, and bleeding from the right ear was controlled at that time. The next day, audiometry showed conductive hearing loss. What type of temporal bone fracture does the patient likely have?

Accepted Answer

Longitudinal

Answer

Transverse

Answer

Oblique

Answer

Mixed

Question 4

A patient presents with scanty, foul-smelling discharge from the middle ear, accompanied by fever, headache, and neck rigidity. CT of the temporal lobe reveals a localized ring-enhancing lesion. Which of the following is the least likely cause of this condition?

Accepted Answer

H. influenza

Answer

S. aureus

Answer

Pseudomonas

Answer

S. Pneumoniae

Question 5

A patient presents with a history of fall and is found to have bleeding from the ear on examination. What is the investigation of choice?

Accepted Answer

CT Temporal bone

Answer

X-ray Skull

Answer

MRI Brain

Answer

CBC

Question 6

The treatment of choice for a mastoid fracture with immediate complete facial nerve paralysis is

Accepted Answer

Nerve decompression

Answer

Sling operation

Answer

Steroid therapy

Answer

Mastoidectomy with nerve grafting

Question 7

Treatment of choice in complete traumatic facial nerve transection is:

Accepted Answer

Facial nerve repair

Answer

Facial sling

Answer

Conservative management

Answer

Systemic corticosteroids

Question 8

Treatment of choice for CSOM with vertigo and facial nerve palsy is:

Accepted Answer

Immediate mastoid exploration

Answer

Myringoplasty

Answer

Antibiotics and labyrinthine sedative

Answer

Labyrinthectomy

Question 9

A 68-year-old diabetic male presents with persistent ear discharge, fever, and headache. He complains of pain that is out of proportion. On examination, granulations and tenderness are observed on the floor of the external auditory canal, along with facial nerve palsy. He is not responding to antibiotics. What is the most probable diagnosis?

Accepted Answer

Malignant otitis externa

Answer

Malignant disease of middle ear

Answer

Malignant disease of nasopharynx

Answer

Chronic otitis externa

Question 10

Which of the following statements about malignant otitis externa is true?

Accepted Answer

Common in diabetics and old age

Answer

Not painful

Answer

Caused by streptococcus

Answer

Responds to topical antibiotics alone

Otologic and Neurotologic Emergencies — MCQs

Otologic and Neurotologic Emergencies — MCQs

On this page

Practice by Chapter

Want unlimited practice?