Diseases of the Ear Practice Questions

Q: What is the most common extra-cranial complication of acute suppurative otitis media (ASOM)?

Mastoiditis. **Explanation:** **1. Why Mastoiditis is Correct:** Acute Mastoiditis is the most common extra-cranial complication of Acute Suppurative Otitis Media (ASOM). Anatomically, the middle ear cleft and the mastoid antrum are continuous. In ASOM, the inflammatory process frequently extends into the mastoid air cells. When the infection leads to the destruction of the bony inter-cellular septa (coalescence), it is termed **Coalescent Mastoiditis**. This remains the most frequent complication despite the widespread use of antibiotics. **2. Analysis of Incorrect Options:** * **Facial Nerve Paralysis (Option A):** This is an extra-cranial complication but is less common than mastoiditis. It occurs due to inflammatory edema of the nerve within the fallopian canal, often through a dehiscent canal. * **Lateral Sinus Thrombosis (Option B):** This is an **intra-cranial** complication (specifically, an intra-cranial vascular complication). It is less common than mastoiditis in the post-antibiotic era. * **Brain Abscess (Option C):** This is the most common **intra-cranial** complication of chronic suppurative otitis media (CSOM), but it is not the most common complication overall, nor is it extra-cranial. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common complication of ASOM:** Mastoiditis (Extra-cranial). * **Most common intra-cranial complication of Otitis Media:** Meningitis (overall), but Brain Abscess is often cited as the most common in the context of CSOM/Cholesteatoma. * **Reservoir Sign:** A classic clinical sign of mastoiditis where the external auditory canal fills with pus immediately after being wiped clean. * **Iron-clad Rule:** Any patient with ASOM who develops retroauricular swelling, tenderness, or sagging of the posterosuperior meatal wall should be suspected of having Mastoiditis.

Q: A 62-year-old male patient presents to the OPD with right ear pain and reduced hearing. On examination, the external auditory canal (EAC) is blocked and shows a "wet newspaper" appearance. Which organism is causing this otomycosis?

Aspergillus niger. **Explanation:** **Otomycosis** is a fungal infection of the external auditory canal, commonly seen in hot, humid climates or in patients with poor ear hygiene or prolonged use of antibiotic ear drops. 1. **Why Aspergillus niger is correct:** The classic clinical description of a **"wet newspaper"** appearance (or "wet blotting paper") is pathognomonic for **Aspergillus niger**. This occurs because the fungal hyphae and debris form a grayish-white mass, which is studded with **black conidiophores** (black spores), giving it a characteristic "peppered" or "sooty" appearance. 2. **Why the other options are incorrect:** * **Aspergillus fumigatus:** This typically presents with **pale blue or greenish** spores. While it is a common cause of otomycosis, it does not produce the classic black "wet newspaper" look. * **Candida albicans:** This presents as a **creamy white, curd-like** discharge. It is often associated with itching and is more common in immunocompromised individuals or those with chronic maceration. * **Tinea:** This refers to dermatophytosis, which usually affects the skin of the pinna or the outer canal as scaly, itchy plaques, but it does not present with the "wet newspaper" debris seen in deep canal infections. **High-Yield Clinical Pearls for NEET-PG:** * **Most common symptom:** Intense itching (pruritus) and ear pain (otalgia). * **Most common organisms:** *Aspergillus niger* (Black), *Aspergillus fumigatus* (Green/Blue), and *Candida* (White). * **Treatment:** Thorough **aural toilet** (suctioning/cleaning) is the most crucial step, followed by topical antifungal agents like **Clotrimazole** or 1% Acetic acid drops to restore the acidic pH of the canal. * **Differential Diagnosis:** Must be differentiated from Otitis Externa Circumscripta (furuncle) which presents with localized tenderness.

Q: A 15-year-old male presents with nominal aphasia and a history of scanty, foul-smelling ear discharge. The patient reports some bleeding when cleaning the ear. Which of the following is the most likely diagnosis?

Temporal lobe abscess. ### Explanation **Correct Answer: B. Temporal Lobe Abscess** The clinical presentation of **scanty, foul-smelling ear discharge** in a young patient is highly suggestive of **Chronic Suppurative Otitis Media (CSOM) - Atticoantral type**, which is prone to intracranial complications. The pathognomonic finding here is **nominal aphasia** (also known as anomic aphasia), where the patient can describe an object but cannot name it. This occurs due to an abscess in the **dominant temporal lobe** (usually the left side in right-handed individuals), which involves the speech centers. The history of bleeding during ear cleaning suggests the presence of **granulations or a polyp**, further indicating an aggressive middle ear pathology. **Why other options are incorrect:** * **Extradural Abscess:** This is the most common intracranial complication of CSOM but is often clinically silent or presents with persistent earache and headache. It does not cause focal neurological deficits like aphasia. * **Cavernous Sinus Thrombosis:** Usually results from infections of the "danger area" of the face or paranasal sinuses. It presents with proptosis, chemosis, and ophthalmoplegia, not aphasia. * **Lateral Sinus Thrombophlebitis:** Characterized by "picket-fence" fever with rigors and chills (Griesinger's sign). While it is a complication of CSOM, it does not cause nominal aphasia. **NEET-PG High-Yield Pearls:** * **Temporal Lobe Abscess:** Most common site for otogenic brain abscess. Look for **Nominal Aphasia** and **Upper Quadrantanopia** (Pie in the sky deformity) due to involvement of Meyer’s loop. * **Cerebellar Abscess:** Second most common site. Look for **ipsilateral** cerebellar signs (Ataxia, Nystagmus, Dysdiadochokinesia). * **Investigation of Choice:** Contrast-enhanced CT (CECT) or MRI (shows ring-enhancing lesions). * **Triad of Brain Abscess:** Headache, fever, and focal neurological deficits.

Q: Otomycosis is caused by which of the following microorganisms?

Aspergillus niger. **Explanation:** **Otomycosis** (also known as "Singapore Ear") is a fungal infection of the external auditory canal. It is most commonly caused by **Aspergillus niger** (the most frequent pathogen) and **Candida albicans**. 1. **Why Aspergillus niger is correct:** It is a saprophytic fungus that thrives in hot and humid climates. Clinically, an infection with *A. niger* is characterized by a "wet newspaper" appearance in the ear canal, often showing black filamentous growth or "black spores" (conidiophores) on otoscopy. It causes intense itching, pain, and a watery discharge. 2. **Why the other options are incorrect:** * **Histoplasma capsulatum:** Causes Histoplasmosis, a systemic fungal infection primarily affecting the lungs (often associated with bird or bat droppings). It does not typically cause localized ear infections. * **Rhinosporidium seeberi:** Causes Rhinosporidiosis, which typically presents as leafy, friable, strawberry-like polypoid masses in the nose or nasopharynx, not the external ear canal. * **Cryptococcus neoformans:** An encapsulated yeast that primarily causes meningitis or pulmonary infections, especially in immunocompromised patients. **High-Yield Clinical Pearls for NEET-PG:** * **Common Organisms:** *Aspergillus niger* (Black), *Aspergillus fumigatus* (Green/Grey), and *Candida albicans* (White/Curdy). * **Predisposing Factors:** Humidity, prolonged use of antibiotic ear drops (which alters local flora), and swimming. * **Treatment:** Thorough ear toileting (suction clearance) followed by topical antifungal agents like **Clotrimazole** or Nystatin. 1-2% Salicylic acid in alcohol can be used as a keratolytic agent.

Q: What is the commonest complication of chronic suppurative otitis media (CSOM)?

Brain abscess. **Explanation:** Chronic Suppurative Otitis Media (CSOM), particularly the **atticoantral (unsafe) variety**, is a significant cause of both extracranial and intracranial complications due to bone erosion by cholesteatoma. **Why Brain Abscess is Correct:** While mastoiditis is the most common *extracranial* complication, **Brain Abscess** is statistically the **most common intracranial complication** of CSOM. It typically occurs in the temporal lobe (via direct spread through the tegmen tympani) or the cerebellum (via the Trautmann’s triangle). In the context of NEET-PG questions, when "complication" is asked broadly without specifying intra- or extracranial, and Brain Abscess is an option alongside others, it is frequently highlighted as the most common life-threatening intracranial sequel. **Analysis of Incorrect Options:** * **A. Subperiosteal abscess:** This is a common *extracranial* complication (e.g., Post-auricular abscess), but it occurs less frequently than mastoiditis or intracranial spread in chronic cases. * **B. Mastoiditis:** While mastoiditis is the most common complication of *Acute* Suppurative Otitis Media (ASOM), in CSOM, the mastoid is often already sclerosed. * **D. Meningitis:** This is the second most common intracranial complication. It is more frequently associated with ASOM in children, whereas brain abscess dominates in adult CSOM cases. **Clinical Pearls for NEET-PG:** * **Most common intracranial complication:** Brain Abscess. * **Most common extracranial complication:** Mastoiditis/Subperiosteal abscess. * **Most common site for Brain Abscess:** Temporal lobe > Cerebellum. * **Earliest sign of intracranial spread:** Persistent headache and fever despite treatment. * **Investigation of choice:** Contrast-enhanced CT (CECT) or MRI to visualize the "ring-enhancing lesion."

Q: Which of the following is not a component of Gradenigo's syndrome?

Greisinger sign positive. **Gradenigo’s Syndrome** (also known as Lannois-Gradenigo syndrome) is a classic complication of **Petrositis** (infection of the petrous apex of the temporal bone). It is characterized by a specific clinical triad resulting from the spread of infection from the middle ear to the petrous apex. ### **Explanation of Options:** * **Correct Answer (B): Greisinger sign** is not a component of Gradenigo’s syndrome. It refers to edema and tenderness over the mastoid process due to thrombosis of the **sigmoid sinus** (specifically the mastoid emissary vein). While it is a complication of otitis media, it is distinct from petrositis. * **Option A (Deep-seated orbital pain):** This is caused by irritation of the **Trigeminal nerve (CN V)**, specifically the Gasserian ganglion located in Meckel’s cave near the petrous apex. * **Option C (Abducent nerve palsy):** The **6th Cranial Nerve** is affected as it passes through **Dorello’s canal** (under the petrosphenoidal ligament). This results in diplopia and lateral rectus palsy. * **Option D (Discharge from ear):** Persistent otorrhea is the third component of the triad, indicating an underlying chronic or acute suppurative otitis media (ASOM/CSOM) leading to the infection. ### **High-Yield Clinical Pearls for NEET-PG:** 1. **The Triad:** 1. Abducent nerve palsy (Diplopia), 2. Trigeminal neuralgia (Retro-orbital pain), 3. Otorrhea. 2. **Anatomy:** The 6th nerve is the most vulnerable because it is fixed within Dorello’s canal. 3. **Diagnosis:** Contrast-enhanced MRI is the gold standard to visualize petrous apex opacification. 4. **Treatment:** Intensive IV antibiotics; surgical drainage (Petrosectomy) is reserved for refractory cases.

Q: Which of the following presents as a mass in the ear that bleeds heavily on touch?

Glomus Jugulare tumor. **Explanation:** **Glomus Jugulare (Paraganglioma)** is the correct answer because it is a highly vascular, slow-growing benign tumor arising from the paraganglia in the jugular bulb. Due to its extreme vascularity, any physical contact or biopsy attempt results in **profuse, "heavy" bleeding**. On otoscopy, it typically presents as a "Rising Sun" appearance (a red/blue mass behind the tympanic membrane). **Analysis of Incorrect Options:** * **Carcinoma of the mastoid:** While squamous cell carcinoma of the ear can present with blood-stained discharge and a friable mass, it is characterized more by deep-seated pain, foul-smelling otorrhea, and early facial nerve palsy rather than the spontaneous, heavy hemorrhage characteristic of glomus tumors. * **Acoustic neuroma:** This is a tumor of the 8th cranial nerve located in the internal auditory canal or cerebellopontine angle. It presents with sensorineural hearing loss and equilibrium issues; it does not present as a visible mass in the external or middle ear. * **Angiofibroma:** Although this is a highly vascular tumor that bleeds profusely, it is a **nasopharyngeal** tumor (Juvenile Nasopharyngeal Angiofibroma) found in adolescent males. It presents with epistaxis and nasal obstruction, not as a primary ear mass. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Tinnitus:** The most common early symptom of Glomus tumors (synchronous with the pulse). * **Brown’s Sign:** Positive when the mass blanches on applying pressure with a Siegel’s speculum. * **Aquino’s Sign:** Pulsations of the mass decrease or stop with carotid artery compression. * **Phelps’ Sign:** Loss of the bony septum between the jugular bulb and the hypotympanum (seen on CT).

Q: Gradenigo's syndrome is due to?

Petrositis. **Explanation:** **Gradenigo’s Syndrome** is a classic clinical triad resulting from **Petrositis** (inflammation/infection of the petrous apex of the temporal bone), usually occurring as a complication of chronic suppurative otitis media (CSOM). The syndrome is defined by the following triad: 1. **Otorrhoea:** Persistent ear discharge. 2. **Retro-orbital pain:** Due to irritation of the **Trigeminal nerve (CN V)** ganglion (Gasserian ganglion) in Meckel’s cave. 3. **Diplopia (Abducens palsy):** Due to paralysis of the **Abducens nerve (CN VI)** as it passes through Dorello’s canal, which is located adjacent to the petrous apex. **Why other options are incorrect:** * **Mastoiditis:** While often a precursor to petrositis, uncomplicated mastoiditis presents with post-auricular pain and swelling but lacks the specific cranial nerve involvements (V and VI). * **Sigmoid sinus thrombophlebitis:** Presents with "picket-fence" fever and signs of raised intracranial pressure (Griesinger's sign), not localized petrous apex symptoms. * **Labyrinthitis:** Characterized by vertigo, nystagmus, and sensorineural hearing loss, rather than retro-orbital pain or diplopia. **High-Yield Clinical Pearls for NEET-PG:** * **Dorello’s Canal:** The anatomical site where the VI nerve is compressed in petrositis. * **Investigation of Choice:** Contrast-enhanced MRI is superior for visualizing the petrous apex, though CT shows bony destruction. * **Treatment:** Intensive IV antibiotics and surgical drainage (e.g., Lempert’s or Thornwaldt’s approach) if medical management fails.

Question 1

What is the most common extra-cranial complication of acute suppurative otitis media (ASOM)?

Accepted Answer

Mastoiditis

Answer

Facial nerve paralysis

Answer

Lateral sinus thrombosis

Answer

Brain abscess

Question 2

A 62-year-old male patient presents to the OPD with right ear pain and reduced hearing. On examination, the external auditory canal (EAC) is blocked and shows a "wet newspaper" appearance. Which organism is causing this otomycosis?

Accepted Answer

Aspergillus niger

Answer

Aspergillus fumigatus

Answer

Candida

Answer

Tinea

Question 3

A 15-year-old male presents with nominal aphasia and a history of scanty, foul-smelling ear discharge. The patient reports some bleeding when cleaning the ear. Which of the following is the most likely diagnosis?

Accepted Answer

Temporal lobe abscess

Answer

Extradural abscess

Answer

Cavernous sinus thrombosis

Answer

Lateral sinus thrombophlebitis

Question 4

Otomycosis is caused by which of the following microorganisms?

Accepted Answer

Aspergillus niger

Answer

Histoplasma capsulatum

Answer

Rhinosporidium seeberi

Answer

Cryptococcus neoformans

Question 5

What is the commonest complication of chronic suppurative otitis media (CSOM)?

Accepted Answer

Brain abscess

Answer

Subperiosteal abscess

Answer

Mastoiditis

Answer

Meningitis

Question 6

Which of the following is not a component of Gradenigo's syndrome?

Accepted Answer

Greisinger sign positive

Answer

Deep seated orbital pain

Answer

Abducent nerve palsy

Answer

Discharge from ear

Question 7

Gradenigo's syndrome is characterized by which of the following?

Accepted Answer

Conductive deafness

Answer

Retroorbital pain

Answer

Ear discharge

Answer

Diplopia

Question 8

Which of the following presents as a mass in the ear that bleeds heavily on touch?

Accepted Answer

Glomus Jugulare tumor

Answer

Carcinoma of the mastoid

Answer

Acoustic neuroma

Answer

Angiofibroma

Question 9

Malignant otitis externa is defined as:

Accepted Answer

A pseudomonas infection in a diabetic patient

Answer

Malignancy of the external ear

Answer

A condition caused by hemophilus influenzae

Answer

The presence of a blackish mass of aspergillus

Question 10

Gradenigo's syndrome is due to?

Accepted Answer

Petrositis

Answer

Mastoiditis

Answer

Sigmoid sinus thrombophlebitis

Answer

Labyrinthitis

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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