Diseases of the Ear Practice Questions

Q: A 7-year-old boy with severe otitis media and mastoiditis underwent surgery. Postoperatively, he developed right corner of the mouth drooping, inability to close his right eye, and food collection in his right oral vestibule. Which nerve was most likely injured during the surgery?

Facial nerve. ### Explanation **Correct Option: C. Facial Nerve** The clinical presentation describes a classic case of **Lower Motor Neuron (LMN) Facial Nerve Palsy**. The facial nerve (CN VII) has a long and tortuous course through the temporal bone, specifically within the bony Fallopian canal. During mastoid surgery (like mastoidectomy for mastoiditis), the nerve is highly vulnerable to injury, particularly in its **tympanic (horizontal)** and **mastoid (vertical)** segments. * **Inability to close the eye:** Due to paralysis of the *Orbicularis oculi*. * **Drooping of the corner of the mouth:** Due to paralysis of the *Zygomaticus* and *Risorius* muscles. * **Food collection in the vestibule:** Due to paralysis of the *Buccinator* muscle, which normally maintains cheek tension to prevent food stasis. **Why Incorrect Options are Wrong:** * **A & B (Glossopharyngeal & Vagus):** These nerves exit the skull via the jugular foramen. Injury would result in dysphagia, loss of gag reflex, or vocal cord palsy, not facial asymmetry. * **D (Maxillary nerve):** This is a sensory branch of the Trigeminal nerve (CN V2). Injury would cause mid-face anesthesia but would not affect the muscles of facial expression. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of injury:** The **horizontal segment** (just above the oval window) is the most common site of surgical trauma, especially if the bone is dehiscent. * **Second Genu:** The nerve is also at risk at the "pyramidal bend" where it turns from horizontal to vertical. * **Landmark for identification:** The **Short process of the Incus** and the **Horizontal Semicircular Canal** are the most reliable surgical landmarks to locate the facial nerve during mastoidectomy. * **Bell’s Phenomenon:** The upward and outward rolling of the eyeball when the patient attempts to close the paralyzed eyelid.

Q: What is a characteristic feature of tuberculous otitis media?

Multiple perforations in the tympanic membrane. **Explanation:** Tuberculous Otitis Media (TOM) is a chronic granulomatous infection of the middle ear, usually secondary to pulmonary tuberculosis. **Why Option A is correct:** The hallmark of TOM is the presence of **multiple "sieve-like" perforations** in the tympanic membrane. This occurs because multiple tubercles form on the drum, which then undergo caseous necrosis and break down. Over time, these small perforations may coalesce to form a single, large total perforation. **Analysis of Incorrect Options:** * **B. Mastoiditis:** While mastoid involvement occurs in TOM, it is usually characterized by extensive bone destruction and "painless" sequestration rather than the acute, painful mastoiditis seen in pyogenic infections. * **C. Middle ear effusion:** Effusion is typical of Serous Otitis Media (Eustachian tube dysfunction). TOM is characterized by pale granulation tissue and cheesy (caseous) discharge rather than simple sterile fluid. * **D. Ear discharge:** While ear discharge is present in TOM, it is not a *characteristic* feature because it is common to almost all forms of Otitis Media. In TOM, the discharge is specifically described as **painless, odorless, and watery/scanty.** **High-Yield Clinical Pearls for NEET-PG:** 1. **Classic Triad:** Painless ear discharge + Multiple perforations + Profound hearing loss (out of proportion to clinical findings). 2. **Facial Nerve Paralysis:** TOM is a common cause of facial nerve palsy in chronic ear infections. 3. **Diagnosis:** Confirmed by identifying *Mycobacterium tuberculosis* on Ziehl-Neelsen (ZN) stain or culture of the discharge/granulation tissue. 4. **Appearance:** The tympanic membrane and middle ear mucosa often appear pale and "cadaveric."

Q: Which of the following conditions is associated with the Phelps sign?

Glomus tumor. **Explanation:** **Phelps sign** is a classic radiological finding associated with **Glomus Jugulare** (a type of Paraganglioma). It refers to the **erosion of the bony septum** (the "jugular spur") that normally separates the jugular bulb from the carotid canal. In Glomus jugulare tumors, the expansive growth of the vascular mass destroys this thin plate of bone, which is visible on a high-resolution CT scan of the temporal bone. **Why other options are incorrect:** * **Acoustic Neuroma:** This is a tumor of the 8th cranial nerve. The characteristic radiological sign is the widening or "flaring" of the **Internal Auditory Meatus (IAM)**, not the jugular bulb area. * **Meniere Disease:** This is a clinical diagnosis characterized by endolymphatic hydrops. Imaging is typically normal; there are no specific bony erosion signs like Phelps sign. * **Otosclerosis:** This involves bony remodeling of the otic capsule. The classic radiological sign is the **"Halo sign"** (double ring sign) in cochlear otosclerosis, or a lucent focus at the *fissula ante fenestram*. **High-Yield Clinical Pearls for Glomus Tumors:** * **Brown’s Sign:** Pulsatile blanching of the tympanic membrane when pressure is applied via a Siegel’s speculum. * **Aquino’s Sign:** Pulsations of the tumor cease upon carotid artery compression. * **Clinical Presentation:** Pulsatile tinnitus (most common symptom) and a "rising sun" appearance behind the eardrum. * **Classification:** Fisch Classification is used to grade the extent of the tumor.

Q: What is Boxer's ear?

Aural hematoma. **Explanation:** **Boxer’s Ear**, also known as **Auricular Hematoma**, is a condition caused by blunt trauma to the pinna, commonly seen in contact sports like boxing, wrestling, and rugby. **Why Option A is correct:** The underlying medical concept involves the shearing forces of trauma causing the perichondrium to separate from the underlying cartilage. This creates a space that fills with blood (hematoma). Since the auricular cartilage relies on the perichondrium for its blood supply, an untreated hematoma leads to avascular necrosis. If not drained promptly, the hematoma organizes into fibrocartilage, resulting in the characteristic shriveled, thickened deformity known as **"Cauliflower Ear."** **Why the other options are incorrect:** * **B. Malformed ear:** This is a generic term for congenital anomalies (like Microtia) rather than an acquired traumatic condition. * **C. Ear with absent tragus:** This is typically a feature of congenital syndromes (e.g., Treacher Collins) or surgical excision, not trauma-induced hematoma. * **D. Lacerated ear:** While a boxer may suffer a laceration (a cut), "Boxer's Ear" specifically refers to the subperichondrial collection of blood and its subsequent deformity. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of Choice:** Immediate **Incision and Drainage (I&D)** under aseptic conditions, followed by a **pressure dressing** to prevent re-accumulation of blood. * **Site of Collection:** The hematoma typically forms on the **anterior/lateral surface** of the pinna where the skin is tightly adherent. * **Complication:** If infected, it can lead to **Perichondritis**, often caused by *Pseudomonas aeruginosa*.

Q: Brown's sign, characterized by blanching of redness, is typically observed in which of the following conditions?

Glomus tumor. **Explanation:** **Brown’s Sign** is a classic clinical finding associated with **Glomus tumors** (specifically Glomus Jugulare and Glomus Tympanicum). These are highly vascular, benign but locally invasive paragangliomas. * **Mechanism:** When positive pressure is applied to the external auditory canal using a Siegle’s speculum, the pressure is transmitted to the middle ear. This compresses the capillaries within the vascular tumor mass, causing it to **blanch (turn pale)** and stop pulsating. Once the pressure is released, the redness and pulsations return. **Analysis of Incorrect Options:** * **Meniere’s Disease:** Characterized by the triad of vertigo, tinnitus, and sensorineural hearing loss due to endolymphatic hydrops. The tympanic membrane appears normal. * **Acoustic Neuroma:** A retrocochlear lesion (Vestibular Schwannoma) involving the 8th cranial nerve. It presents with unilateral hearing loss and equilibrium issues, but no middle ear vascular signs. * **Otosclerosis:** Presents with conductive hearing loss due to stapes fixation. While it may show **Schwartz’s sign** (a flamingo-pink flush on the promontory due to increased vascularity), it does not exhibit blanching upon pneumatic pressure. **High-Yield Clinical Pearls for NEET-PG:** * **Pulsatile Tinnitus:** The most common presenting symptom of Glomus tumors. * **Rising Sun Appearance:** The red/blue fleshy mass seen behind an intact tympanic membrane in Glomus tumors. * **Aquino’s Sign:** Blanching of the tumor and cessation of pulsations upon carotid artery compression (also seen in Glomus tumors). * **Phelps’ Sign:** Loss of the bony plate between the jugular bulb and the middle ear (seen on CT).

Q: The 'Cart Wheel' sign is seen in which of the following conditions?

Acute suppurative otitis media (ASOM). **Explanation:** The **'Cart Wheel' sign** (also known as the 'Spoke-like' appearance) is a classic otoscopic finding in the **Stage of Hyperemia** of **Acute Suppurative Otitis Media (ASOM)**. **1. Why ASOM is correct:** During the initial stage of ASOM, the mucoperiosteum of the middle ear becomes congested. This leads to the dilation of blood vessels along the handle of the malleus and the periphery of the tympanic membrane. These engorged vessels radiate from the center (umbo) toward the periphery, resembling the spokes of a wheel, hence the term "Cart Wheel" sign. **2. Why other options are incorrect:** * **Acute Otitis Media (AOM):** While ASOM is a type of AOM, the question specifically targets the pathological stages of the suppurative process where this specific vascular pattern is described. * **Otitis Media with Effusion (OME):** This is characterized by a dull, retracted tympanic membrane with an altered light reflex, air-fluid levels, or bubbles. It lacks the acute inflammatory hyperemia seen in ASOM. * **Chronic Suppurative Otitis Media (CSOM):** This involves a permanent perforation of the tympanic membrane. The membrane is usually thickened or scarred (tympanosclerosis) rather than acutely hyperemic. **3. Clinical Pearls for NEET-PG:** * **Stages of ASOM:** 1. **Stage of Hyperemia:** Cart wheel sign. 2. **Stage of Exudation:** Bulging TM (**'Donut' sign** or 'Nipple' sign if a small perforation is imminent). 3. **Stage of Suppuration:** Perforation occurs; pulsatile discharge (**'Lighthouse' sign**). 4. **Stage of Resolution:** Healing. 5. **Stage of Complication:** Spread beyond the middle ear. * **Most common organism in ASOM:** *Streptococcus pneumoniae* (followed by *H. influenzae*). * **Treatment of choice:** Amoxicillin is the first-line antibiotic.

Q: Edema over the mastoid is seen in which condition?

Lateral sinus thrombophlebitis. **Explanation:** The correct answer is **Lateral sinus thrombophlebitis**. Edema over the mastoid process in this condition is known as **Griesinger's sign**. **1. Why Lateral Sinus Thrombophlebitis is correct:** Lateral (Sigmoid) sinus thrombophlebitis is a serious intracranial complication of middle ear infections. The sigmoid sinus drains into the internal jugular vein. When a thrombus forms, it can lead to retrograde congestion of the **mastoid emissary vein**, which connects the sigmoid sinus to the extracranial venous system. This congestion results in edema and tenderness over the posterior part of the mastoid bone (Griesinger's sign). **2. Why the other options are incorrect:** * **Bell’s Palsy:** This is an idiopathic lower motor neuron facial nerve palsy. It presents with facial drooping but does not involve venous congestion or mastoid edema. * **CSOM/ASOM:** While these are the underlying infections that *lead* to complications, uncomplicated CSOM or ASOM typically presents with ear discharge or pain. Mastoid edema only occurs if they progress to **Mastoiditis** (edema in the post-auricular sulcus) or **Lateral Sinus Thrombophlebitis** (edema over the mastoid bone). **3. High-Yield Clinical Pearls for NEET-PG:** * **Griesinger’s Sign:** Edema over the mastoid due to mastoid emissary vein thrombosis. * **Picket-fence Fever:** The characteristic hectic, spiking fever seen in lateral sinus thrombophlebitis. * **Tobey-Ayer Test / Queckenstedt’s Test:** Used to detect lateral sinus obstruction by measuring CSF pressure during jugular vein compression. * **Delta Sign:** Seen on contrast-enhanced CT, representing a thrombus in the sigmoid sinus. * **Greisinger's vs. Mastoiditis:** In Mastoiditis, the edema is usually more anterior, causing the pinna to be displaced "downwards and forwards."

Q: Herpes zoster infection of the geniculate ganglion is known to cause which of the following conditions?

Ramsay Hunt syndrome. **Explanation:** **Ramsay Hunt Syndrome (Herpes Zoster Oticus)** is caused by the reactivation of the **Varicella-Zoster Virus (VZV)** dormant in the **Geniculate Ganglion** of the Facial Nerve (CN VII). The classic clinical triad includes: 1. **Facial Nerve Palsy:** Lower motor neuron type. 2. **Otalgia:** Severe ear pain. 3. **Vesicular Eruptions:** Located on the pinna, external auditory canal, or soft palate (the sensory distribution of the facial nerve). *Note: It may also involve CN VIII, leading to vertigo and sensorineural hearing loss.* **Analysis of Incorrect Options:** * **A. Bell’s Palsy:** This is an **idiopathic**, acute lower motor neuron facial palsy. While some theories suggest Herpes Simplex Virus (HSV) involvement, it is by definition a diagnosis of exclusion and lacks the vesicular eruptions seen in Ramsay Hunt. * **C. Melkersson-Rosenthal Syndrome:** A rare neurological disorder characterized by a triad of **recurrent facial paralysis**, **fissured tongue (lingua plicata)**, and **granulomatous orofacial edema**. * **D. Frey’s Syndrome (Gustatory Sweating):** This is a complication of **parotid surgery** (parotidectomy). It occurs due to aberrant regeneration of auriculotemporal nerve fibers, where parasympathetic fibers meant for the parotid gland instead supply the sweat glands of the overlying skin. **High-Yield NEET-PG Pearls:** * **Prognosis:** Ramsay Hunt syndrome has a poorer prognosis for facial nerve recovery compared to Bell’s palsy. * **Treatment:** Combination of **Oral Acyclovir/Valacyclovir** and **Corticosteroids**. * **Sensory Supply:** The "Hitler’s area" (concha and external meatus) is the specific site where VZV vesicles appear due to the sensory distribution of the facial nerve.

Question 1

A 7-year-old boy with severe otitis media and mastoiditis underwent surgery. Postoperatively, he developed right corner of the mouth drooping, inability to close his right eye, and food collection in his right oral vestibule. Which nerve was most likely injured during the surgery?

Accepted Answer

Facial nerve

Answer

Glossopharyngeal nerve

Answer

Vagus nerve

Answer

Maxillary division of the trigeminal nerve

Question 2

What is a characteristic feature of tuberculous otitis media?

Accepted Answer

Multiple perforations in the tympanic membrane

Answer

Mastoiditis

Answer

Middle ear effusion

Answer

Ear discharge

Question 3

Which of the following conditions is associated with the Phelps sign?

Accepted Answer

Glomus tumor

Answer

Acoustic neuroma

Answer

Meniere disease

Answer

Otosclerosis

Question 4

What is Boxer's ear?

Accepted Answer

Aural hematoma

Answer

Malformed ear

Answer

Ear with absent tragus

Answer

Lacerated ear

Question 5

Brown's sign, characterized by blanching of redness, is typically observed in which of the following conditions?

Accepted Answer

Glomus tumor

Answer

Meniere's disease

Answer

Acoustic neuroma

Answer

Otosclerosis

Question 6

Which of the following statements about the tympanic membrane is false?

Accepted Answer

A healed perforation of the tympanic membrane has three layers.

Answer

The cone of light is located anteroinferiorly.

Answer

Shrapnell's membrane is also known as the pars flaccida.

Answer

The anterior malleolar fold is longer than the posterior malleolar fold.

Question 7

The 'Cart Wheel' sign is seen in which of the following conditions?

Accepted Answer

Acute suppurative otitis media (ASOM)

Answer

Acute otitis media (AOM)

Answer

Otitis media with effusion (OME)

Answer

Chronic suppurative otitis media (CSOM)

Question 8

A 18-month-old boy presents with a 2-day history of fever, irritability, and frequent tugging of his left ear. He was diagnosed with acute otitis media and treated with antibiotics. Two months later, otoscopic examination reveals air-fluid levels in the left ear, and medical management has failed to resolve the effusion. What is the treatment of choice for this child?

Accepted Answer

Myringotomy with ventilation tube insertion

Answer

Conservative management

Answer

Tympanoplasty

Answer

Myringotomy with diode laser

Question 9

Edema over the mastoid is seen in which condition?

Accepted Answer

Lateral sinus thrombophlebitis

Answer

Bell's Palsy

Answer

Chronic suppurative otitis media (CSOM)

Answer

Acute suppurative otitis media (ASOM)

Question 10

Herpes zoster infection of the geniculate ganglion is known to cause which of the following conditions?

Accepted Answer

Ramsay Hunt syndrome

Answer

Bell's palsy

Answer

Mérkelson-Rosenthal syndrome

Answer

Frey's syndrome

Diseases of the Ear — MCQs

Diseases of the Ear — MCQs

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