Diseases of the Ear Practice Questions

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

Subperiosteal abscess. **Explanation:** The correct answer is **Subperiosteal abscess**. **Why it is correct:** Complications of Otitis Media are divided into intra-cranial and extra-cranial (intra-temporal). Among the extra-cranial complications of Acute Suppurative Otitis Media (ASOM), the most frequent is a **subperiosteal abscess**, specifically a **Post-auricular abscess**. This occurs when the infection spreads from the mastoid air cells through the lateral mastoid cortex, collecting between the bone and the periosteum. In children, this is particularly common due to the thinness of the mastoid cortex and open sutures. **Analysis of incorrect options:** * **A. Facial nerve paralysis:** While a common intra-temporal complication of *chronic* otitis media (cholesteatoma), it is less frequent than a subperiosteal abscess in the setting of *acute* infection. * **B. Lateral sinus thrombosis:** This is an **intra-cranial** vascular complication. While serious, it occurs less frequently than localized abscess formation. * **C. Brain abscess:** This is the most common **intra-cranial** complication of otitis media overall, but it is not an extra-cranial complication. **High-Yield Clinical Pearls for NEET-PG:** * **Most common extra-cranial complication (ASOM/CSOM):** Subperiosteal (Post-auricular) abscess. * **Most common intra-cranial complication:** Brain abscess (specifically in the temporal lobe or cerebellum). * **Most common route of spread:** Decalification (retrograde thrombophlebitis) in ASOM; Bone erosion in CSOM. * **Bezold’s Abscess:** A rare extra-cranial complication where pus tracks into the sternocleidomastoid muscle. * **Citelli’s Abscess:** Pus tracks into the posterior belly of the digastric muscle.

Q: What is the most common cause of congenital sensorineural hearing loss?

Cytomegalovirus (CMV). **Explanation:** **Cytomegalovirus (CMV)** is the most common cause of non-hereditary (acquired) congenital sensorineural hearing loss (SNHL) worldwide. While most infants with congenital CMV are asymptomatic at birth (90%), approximately 10–15% of these "asymptomatic" infants will eventually develop SNHL. In symptomatic cases, the incidence of SNHL rises to over 50%. The hearing loss is often progressive, can be unilateral or bilateral, and may have a delayed onset, making CMV a critical diagnosis to consider in pediatric audiology. **Analysis of Incorrect Options:** * **Parvovirus B19 (A):** Primarily associated with hydrops fetalis due to severe fetal anemia and aplastic crisis; it is not a recognized cause of congenital hearing loss. * **Rubella (C):** Historically, Congenital Rubella Syndrome (CRS) was a leading cause of SNHL (presenting with the classic triad of cataracts, PDA, and deafness). However, due to widespread MMR vaccination, its incidence has drastically declined, making CMV more prevalent. * **Toxoplasmosis (D):** Part of the TORCH spectrum, it typically presents with the triad of chorioretinitis, hydrocephalus, and intracranial calcifications. While it can cause SNHL, it is significantly less common than CMV. **High-Yield Clinical Pearls for NEET-PG:** * **Imaging:** CMV typically shows **periventricular calcifications**, whereas Toxoplasmosis shows **diffuse** intracranial calcifications. * **Diagnosis:** The gold standard for congenital CMV is detecting the virus in **urine or saliva via PCR** within the first 3 weeks of life. * **Treatment:** Oral **Valganciclovir** (or IV Ganciclovir) for 6 months is indicated for symptomatic neonates to improve hearing and neurodevelopmental outcomes. * **Overall Cause:** While CMV is the most common *infectious* cause, **GJB2 gene mutations** (Connexin 26) are the most common *genetic* cause of congenital SNHL.

Q: What is the true statement about Acute Suppurative Otitis Media (ASOM)?

It most frequently resolves without sequelae.. **Explanation:** **Acute Suppurative Otitis Media (ASOM)** is an acute pyogenic inflammation of the middle ear cleft, typically following an upper respiratory tract infection (URTI) via the Eustachian tube. **1. Why Option A is Correct:** The natural history of ASOM involves stages (Hyperemia, Exudation, Suppuration, Resolution, and Complication). With the advent of modern antibiotics and timely intervention, the vast majority of cases enter the **Stage of Resolution**, where the tympanic membrane heals, hearing returns to normal, and the infection clears without leaving any permanent damage or sequelae. **2. Why Other Options are Incorrect:** * **Option B:** ASOM typically follows **viral URTI** (like the common cold, influenza, or measles) or adenoiditis, not parotitis. Parotitis (mumps) is more commonly associated with sudden sensorineural hearing loss (SNHL), not suppurative middle ear infection. * **Option C:** Treatment is primarily **medical**, consisting of antibiotics (Amoxicillin is the drug of choice), nasal decongestants, and analgesics. Surgery is reserved for complications; even then, a **Myringotomy** is the procedure of choice for severe pain or bulging. Radical mastoidectomy is used for Chronic Suppurative Otitis Media (CSOM) with cholesteatoma. * **Option D:** The most common causative organism in ASOM is ***Streptococcus pneumoniae***, followed by *Haemophilus influenzae* and *Moraxella catarrhalis*. *Pseudomonas aeruginosa* is the hallmark of CSOM (Safe/Tubotympanic type). **High-Yield Clinical Pearls for NEET-PG:** * **Most common route of infection:** Eustachian tube. * **Earliest sign:** Cartwheel appearance of the tympanic membrane (vessels radiating from the handle of malleus). * **Pulsatile Otorrhea:** Known as the **"Lighthouse sign,"** seen in the Stage of Suppuration. * **Drug of Choice:** Amoxicillin (or Amoxicillin-Clavulanate).

Q: A blue eardrum is typically seen in which of the following conditions?

Secretory otitis media. **Explanation:** The color of the tympanic membrane (TM) is a vital diagnostic clue in ENT. A **blue eardrum** (idiopathic hemotympanum) in **Secretory Otitis Media (SOM)** occurs due to the presence of sterile, brownish-yellow fluid in the middle ear. When this fluid is viewed through the translucent TM, the light reflection and the underlying vascular congestion create a characteristic bluish or slate-grey appearance. In chronic cases, the breakdown of hemoglobin into hemosiderin within the middle ear effusion further contributes to this "blue" discoloration. **Analysis of Options:** * **Tympanosclerosis:** Characterized by hyalinization and calcification of the TM, appearing as **chalky white patches** (horseshoe-shaped). * **Otosclerosis:** Usually presents with a normal TM. However, in active phases (Schwartze sign), a **flamingo pink** hue is seen due to increased vascularity over the promontory. * **Myringitis Bullosa:** Presents with **serosanguinous bullae** (blisters) on the TM surface, typically following a viral infection. **High-Yield Clinical Pearls for NEET-PG:** 1. **Golden Yellow/Amber TM:** Also seen in Secretory Otitis Media (early stages). 2. **Red/Bulging TM:** Classic sign of Acute Suppurative Otitis Media (ASOM) – "Cartwheel appearance." 3. **Brown/Black TM:** Suggests a fungal infection (Otomycosis) or a foreign body. 4. **Differential Diagnosis for Blue TM:** Apart from SOM, always consider a **High Jugular Bulb** or a **Glomus Tumor** (Rising sun appearance).

Q: Ceruminous glands are modified-

Apocrine glands. **Explanation:** The external auditory canal (EAC) consists of a cartilaginous outer third and a bony inner two-thirds. The skin of the **cartilaginous portion** contains specialized structures: hair follicles, sebaceous glands, and ceruminous glands. **1. Why Apocrine Glands is Correct:** Ceruminous glands are **modified apocrine sweat glands**. They are located in the subcutaneous layer of the outer cartilaginous EAC. These glands produce a milky secretion that, when mixed with the fatty secretions of sebaceous glands and desquamated epithelial cells, forms **cerumen (earwax)**. Cerumen serves a protective role by lubricating the canal and maintaining an acidic pH (approx. 6.1) to inhibit bacterial and fungal growth. **2. Why Other Options are Incorrect:** * **Eccrine glands:** These are the common sweat glands found over most of the body surface (e.g., palms, forehead) involved in thermoregulation. They are not found in the EAC. * **Sebaceous glands:** While sebaceous glands *are* present in the EAC and contribute the lipid component to earwax, the ceruminous glands themselves are specifically modified apocrine glands, not sebaceous. **Clinical Pearls for NEET-PG:** * **Location:** Ceruminous glands are found **only** in the outer 1/3 (cartilaginous part) of the EAC. Therefore, wax is never formed in the bony part unless pushed there by Q-tips. * **Ceruminoma:** A rare tumor arising from these glands. While often benign (pleomorphic adenoma), they can be malignant (adenoid cystic carcinoma). * **Protective Function:** Cerumen contains **Lysozyme and Immunoglobulins**, providing an immunological barrier against infection.

Q: Which anatomical region does this tumour arise from?

Hypotympanum. ***Hypotympanum*** - **Glomus jugulare tumors** (paragangliomas) characteristically arise from the **jugular bulb region** in the hypotympanum, below the level of the tympanic membrane. - These **vascular tumors** typically present as **pulsatile masses** extending from the **inferior portion** of the middle ear cavity. *Epitympanum* - The **epitympanum (attic)** is located **above the tympanic membrane** and typically involved by **cholesteatomas**, not paragangliomas. - **Glomus jugulare tumors** do not originate from this **superior compartment** of the middle ear. *Mesotympanum* - The **mesotympanum** is at the level of the **tympanic membrane** and is the site of **glomus tympanicum tumors**, which are smaller paragangliomas. - **Glomus jugulare** specifically arises from the **jugular bulb below** this level, not at the tympanic membrane level. *Inner ear* - The **inner ear** contains the **cochlea** and **vestibular system** and is not the origin of **glomus jugulare tumors**. - These tumors arise from **paraganglia** associated with the **jugular bulb** in the middle ear space, not inner ear structures.

Q: Which of the following is not a common site for paraganglioma?

Geniculate ganglion. **Explanation:** Paragangliomas (also known as glomus tumors) are neuroendocrine tumors arising from **extra-adrenal paraganglia**—clusters of neural crest cells associated with the autonomic nervous system. These cells are typically found near major blood vessels and specific cranial nerves. **Why Option D is Correct:** The **Geniculate ganglion** is a sensory ganglion of the Facial Nerve (CN VII) located at the first transition (first genu) of the nerve. It does not contain paraganglionic tissue. Therefore, it is not a site for paraganglioma. Tumors at this site are typically facial nerve schwannomas or hemangiomas. **Why the other options are incorrect:** * **A. Carotid bifurcation:** This is the most common site for head and neck paragangliomas, known as a **Carotid Body Tumor**. It typically presents as a painless, pulsatile neck mass (Fontaine’s sign positive). * **B. Jugular foramen:** This is the site for **Glomus Jugulare**, arising from the dome of the jugular bulb. It often involves cranial nerves IX, X, and XI. * **C. Promontory in the middle ear:** This is the site for **Glomus Tympanicum**, arising from the paraganglia along the tympanic branch of the glossopharyngeal nerve (Jacobson’s nerve). **Clinical Pearls for NEET-PG:** 1. **Rule of 10s:** 10% are familial, 10% are bilateral/multiple, and 10% are malignant (though head and neck paragangliomas are mostly benign). 2. **Phelps Sign:** Loss of bony outline between the carotid canal and jugular foramen (seen in Glomus Jugulare). 3. **Brown’s Sign:** Pulsation of the tympanic membrane that blanches with positive pressure (Pneumatic otoscopy). 4. **Aquino’s Sign:** Blanching of the tympanic mass on carotid artery compression. 5. **Investigation of Choice:** Contrast-enhanced MRI and MRA/MRV. On imaging, they show a characteristic **"Salt and Pepper" appearance**.

Q: A 11-year-old boy presented with increasing left-sided pain below his ear for 4 days along with high-grade fever. He also had nasal congestion for the past 3 weeks, coinciding with high pollen counts. The pain worsened despite decongestants and acetaminophen. The patient has a history of allergic rhinitis and multiple episodes of otitis media. On examination, there is tenderness and swelling of the left mastoid process and fluid behind the left tympanic membrane. CT scan of the concerned region was performed. Which of the following is the most likely diagnosis?

Acute mastoiditis. **Explanation:** **1. Why Acute Mastoiditis is Correct:** Acute mastoiditis is a common complication of **Acute Otitis Media (AOM)**, especially in children with pre-existing risk factors like allergic rhinitis and recurrent ear infections. The clinical triad of **fever, ear pain, and mastoid tenderness/swelling** (often with protrusion of the pinna) is classic. The pathophysiology involves the spread of infection from the middle ear to the mastoid air cells, leading to pus accumulation and bony destruction (coalescent mastoiditis). The CT scan (implied in the prompt) would typically show opacification of mastoid air cells and loss of bony septa. **2. Why Other Options are Incorrect:** * **Otitis Externa:** Presents with tragal tenderness and ear canal edema. While it causes pain, it does not typically cause mastoid swelling or fluid behind the tympanic membrane. * **Mucormycosis:** An invasive fungal infection usually seen in immunocompromised or diabetic patients. It typically presents with necrotic eschars in the nasal cavity or palate, not isolated mastoiditis in a child. * **Meningioma:** A slow-growing benign tumor. While it can occur in the posterior fossa, it would not present with acute fever, nasal congestion, and inflammatory mastoid swelling. **Clinical Pearls for NEET-PG:** * **Most common organism:** *Streptococcus pneumoniae* (followed by *H. influenzae* and *S. pyogenes*). * **Imaging of choice:** HRCT of the Temporal Bone (shows "clouding" of air cells). * **Reservoir Sign:** Sinking of the posterosuperior meatal wall is a characteristic finding. * **Management:** IV antibiotics (e.g., Ceftriaxone) + Myringotomy. If medical management fails or a subperiosteal abscess forms, a **Cortical Mastoidectomy (Schwartze operation)** is indicated.

Q: Crocodile tears are seen in which condition?

Abnormal VII nerve regeneration. **Explanation:** **Crocodile Tears Syndrome (Bogorad’s Syndrome)** is a rare complication occurring during the recovery phase of **Bell’s Palsy** or following traumatic injury to the Facial Nerve (CN VII). **Why the correct answer is right:** The underlying mechanism is **synkinesis** due to **abnormal/faulty regeneration of nerve fibers**. Normally, parasympathetic secretomotor fibers from the *superior salivatory nucleus* travel via the greater petrosal nerve to the submandibular ganglion to supply the salivary glands. Following injury proximal to the geniculate ganglion, these regenerating fibers are misdirected. Instead of reaching the salivary glands, they travel via the greater petrosal nerve to the **lacrimal gland**. Consequently, a gustatory stimulus (smelling or tasting food) that should trigger salivation instead triggers lacrimation (tearing). **Why the other options are wrong:** * **Frey’s Syndrome:** This involves abnormal regeneration of the **Auriculotemporal nerve** (branch of CN V3) following parotid surgery. It results in *gustatory sweating* and flushing of the cheek, not tearing. * **Conjunctivitis:** This is an inflammatory/infectious condition of the eye leading to reflex tearing due to irritation, not a neurological miswiring. * **Lacrimal Tumour:** These present with localized swelling, proptosis, or mechanical epiphora (overflow of tears) due to duct obstruction, but do not involve gustatory-linked tearing. **High-Yield Clinical Pearls for NEET-PG:** * **Site of Lesion:** Proximal to the geniculate ganglion. * **Treatment:** Injection of **Botulinum toxin** into the lacrimal gland is the gold standard for symptomatic relief. * **Frey’s Syndrome vs. Crocodile Tears:** Both are "gustatory" phenomena. Remember: **Frey’s = Sweating; Crocodile = Tearing.**

Question 1

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

Accepted Answer

Subperiosteal abscess

Answer

Facial nerve paralysis

Answer

Lateral sinus thrombosis

Answer

Brain abscess

Question 2

What is the most common cause of congenital sensorineural hearing loss?

Accepted Answer

Cytomegalovirus (CMV)

Answer

Parvovirus

Answer

Rubella

Answer

Toxoplasmosis

Question 3

What is the true statement about Acute Suppurative Otitis Media (ASOM)?

Accepted Answer

It most frequently resolves without sequelae.

Answer

It commonly follows painful parotitis.

Answer

Radical mastoidectomy is required for treatment.

Answer

The most common organism is Pseudomonas.

Question 4

A blue eardrum is typically seen in which of the following conditions?

Accepted Answer

Secretory otitis media

Answer

Tympanosclerosis

Answer

Otosclerosis

Answer

Myringitis bullosa

Question 5

Ceruminous glands are modified-

Accepted Answer

Apocrine glands

Answer

Eccrine glands

Answer

Sebaceous glands

Answer

None of the above

Question 6

A 70-year-old patient with long-standing type 2 diabetes mellitus presents with complaints of pain in the left ear with purulent drainage. On physical exam, the patient is afebrile. The pinna of the left ear is tender, and the external auditory canal is swollen and edematous. The peripheral white blood cell count is normal. What is the organism most likely to grow from the purulent drainage?

Accepted Answer

Pseudomonas aeruginosa

Answer

Staphylococcus aureus

Answer

Candida albicans

Answer

M. Tuberculosis

Question 7

Which anatomical region does this tumour arise from?

Accepted Answer

Hypotympanum

Answer

Epitympanum

Answer

Mesotympanum

Answer

Inner ear

Question 8

Which of the following is not a common site for paraganglioma?

Accepted Answer

Geniculate ganglion

Answer

Carotid bifurcation

Answer

Jugular foramen

Answer

Promontory in the middle ear

Question 9

A 11-year-old boy presented with increasing left-sided pain below his ear for 4 days along with high-grade fever. He also had nasal congestion for the past 3 weeks, coinciding with high pollen counts. The pain worsened despite decongestants and acetaminophen. The patient has a history of allergic rhinitis and multiple episodes of otitis media. On examination, there is tenderness and swelling of the left mastoid process and fluid behind the left tympanic membrane. CT scan of the concerned region was performed. Which of the following is the most likely diagnosis?

Accepted Answer

Acute mastoiditis

Answer

Otitis externa

Answer

Mucormycosis

Answer

Meningioma

Question 10

Crocodile tears are seen in which condition?

Accepted Answer

Abnormal VII nerve regeneration

Answer

Frey's syndrome

Answer

Conjunctivitis

Answer

Lacrimal tumour

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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