Otology — MCQs

Otology Indian Medical PG Practice Questions and MCQs

Question 121: Edema over the mastoid is seen in which condition?

A. Bell's Palsy
B. Lateral sinus thrombophlebitis (Correct Answer)
C. Chronic suppurative otitis media
D. Acute suppurative otitis media

Explanation: **Explanation:** The correct answer is **Lateral Sinus Thrombophlebitis (LSTP)**. The specific clinical sign described is known as **Griesinger’s Sign**. **1. Why Lateral Sinus Thrombophlebitis is correct:** LSTP is a complication of chronic or acute otitis media where infection spreads to the sigmoid (lateral) sinus. This leads to the formation of an infected thrombus. Griesinger’s sign occurs due to **thrombosis of the mastoid emissary vein**, which normally drains into the sigmoid sinus. When this vein is obstructed, it leads to edema and tenderness over the posterior part of the mastoid process. **2. Why the other options are incorrect:** * **Bell’s Palsy:** This is an idiopathic lower motor neuron facial nerve paralysis. It involves the facial nerve (CN VII) but does not cause mastoid edema or inflammatory changes. * **Chronic Suppurative Otitis Media (CSOM):** While CSOM is the most common *precursor* to LSTP, uncomplicated CSOM presents with ear discharge and hearing loss, not mastoid edema. * **Acute Suppurative Otitis Media (ASOM):** ASOM involves inflammation of the middle ear cleft. While it can lead to **Mastoiditis** (which causes edema over the mastoid due to subperiosteal abscess), the classic association for edema specifically linked to venous congestion in this region is LSTP. **Clinical Pearls for NEET-PG:** * **Griesinger’s Sign:** Edema over the mastoid due to mastoid emissary vein thrombosis (Pathognomonic for LSTP). * **Picket-fence fever:** The characteristic hectic temperature chart seen in LSTP. * **Tobey-Ayer Test / Queckenstedt’s Test:** Used during lumbar puncture to detect lateral sinus obstruction (pressure does not rise when the jugular vein on the affected side is compressed). * **Delta Sign:** Seen on contrast-enhanced CT, representing a thrombus in the sigmoid sinus.

Question 122: Pulsatile otorrhoea is typically seen in which of the following conditions?

A. Glomus tumor
B. CSF otorrhea
C. Acute suppurative otitis media (ASOM) (Correct Answer)
D. Fistula

Explanation: **Explanation:** **Pulsatile otorrhoea** (also known as the **"Lighthouse effect"**) is a classic clinical sign of **Acute Suppurative Otitis Media (ASOM)** in the stage of suppuration/perforation. 1. **Why ASOM is correct:** During the acute phase of infection, the middle ear mucosa becomes intensely congested and hyperemic. When the tympanic membrane perforates due to pressure, the pus is extruded through a small perforation. Because the underlying mucosa is so vascular, the pulsations of the dilated capillaries are transmitted to the fluid (pus), causing it to "ebb and flow" or pulsate visibly through the perforation. 2. **Why other options are incorrect:** * **Glomus Tumor:** While this condition is famous for **pulsatile tinnitus** (the patient hears their heartbeat) and a "rising sun" appearance behind an intact drum, it does not typically cause pulsatile *otorrhoea* unless there is a secondary infection and perforation, which is rare. * **CSF Otorrhoea:** This presents as a clear, watery discharge (halo sign). While it may pulsate in sync with intracranial pressure changes, it is not the "typical" or classic association taught for this clinical sign in exams. * **Fistula:** A labyrinthine fistula typically presents with vertigo and nystagmus triggered by pressure changes (Hennebert’s sign), not pulsatile discharge. **High-Yield Clinical Pearls for NEET-PG:** * **Lighthouse Sign:** Always associate this term with ASOM. * **Pulsatile Tinnitus vs. Otorrhoea:** If the patient *hears* the pulse, think Glomus Jugulare or Carotid Body Tumor. If the doctor *sees* the discharge pulsing, think ASOM. * **Management of ASOM:** The treatment of choice is systemic antibiotics. If the drum is bulging and painful (pre-perforation), a **myringotomy** is performed in the postero-inferior quadrant.

Question 123: What is the most common site of a Glomus tumor in the middle ear?

A. Epitympanum
B. Mesotympanum
C. Hypotympanum (Correct Answer)
D. Over the malleus

Explanation: **Explanation:** **Glomus tumors** (also known as paragangliomas) are the most common benign tumors of the middle ear. They arise from **glomus bodies** (chemoreceptor cells) located along the course of Jacobson’s nerve (tympanic branch of CN IX) or Arnold’s nerve (auricular branch of CN X). 1. **Why Hypotympanum is correct:** The majority of glomus bodies in the middle ear are located along the **tympanic canaliculus** and on the **promontory**, specifically concentrated in the **hypotympanum** (the floor of the middle ear). Glomus tympanicum specifically arises from the glomus bodies on the promontory, which is anatomically situated in the inferior-medial aspect of the middle ear space. 2. **Why other options are incorrect:** * **Epitympanum (Attic):** This area contains the head of the malleus and body of the incus. While tumors can spread here, it is not the primary site of origin. * **Mesotympanum:** While the promontory spans the mesotympanum, the highest density of glomus bodies is found inferiorly toward the hypotympanum. * **Over the malleus:** Glomus tumors arise from neural crest cells associated with nerves, not from the ossicles themselves. **High-Yield Clinical Pearls for NEET-PG:** * **Glomus Tympanicum:** Arises from Jacobson’s nerve on the promontory. * **Glomus Jugulare:** Arises from the dome of the jugular bulb (below the floor of the middle ear). * **Clinical Sign:** **Pulsatile tinnitus** (synchronous with pulse) and a **"Rising Sun" appearance** (reddish-blue mass behind an intact tympanic membrane). * **Brown’s Sign:** Pulsation of the tumor increases with positive pressure using a Siegle’s speculum. * **Aquino’s Sign:** Blanching of the mass on carotid artery compression. * **Investigation of Choice:** Contrast-enhanced CT (to see bone destruction) and MRI (Salt and Pepper appearance).

Question 124: Ca Wheel sign is seen in which of the following conditions?

A. Acute Suppurative Otitis Media (ASOM) (Correct Answer)
B. Glomus tumor
C. Otitis Media with Effusion (OME)
D. Chronic Suppurative Otitis Media (CSOM)

Explanation: **Explanation:** The **Cartwheel appearance** (or Cartwheel sign) is a classic otoscopic finding seen in the early stages of **Acute Suppurative Otitis Media (ASOM)**, specifically during the **Stage of Hyperemia**. **Why it occurs:** In the initial phase of ASOM, the inflammatory process leads to significant congestion and dilatation of the blood vessels of the tympanic membrane. These engorged vessels radiate from the periphery (annulus) toward the center (umbo) and along the handle of the malleus. This radial pattern of vascular congestion mimics the spokes of a wheel, hence the name "Cartwheel sign." **Analysis of Incorrect Options:** * **Glomus Tumor:** Characterized by a **"Rising Sun" appearance**, where a red/pink fleshy mass is visible behind an intact tympanic membrane. It may also show **Pulsatile Tinnitus** and a positive **Brown’s sign**. * **Otitis Media with Effusion (OME):** Typically presents with an amber-colored or dull tympanic membrane, retracted drum, and the presence of **air-fluid levels or bubbles**. * **Chronic Suppurative Otitis Media (CSOM):** Characterized by a permanent **perforation** of the tympanic membrane (central or marginal) and chronic ear discharge, rather than acute vascular congestion. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of ASOM:** 1. **Stage of Tubal Occlusion:** Retracted drum. 2. **Stage of Hyperemia:** Cartwheel sign. 3. **Stage of Exudation:** Bulging drum (**Donut sign** or **Nipple sign**). 4. **Stage of Suppuration:** Perforation occurs. 5. **Stage of Resolution/Complication.** * **Light Reflex:** It is lost early in ASOM due to the change in the drum's contour and surface. * **Schwartze Sign:** A flamingo-pink flush seen over the promontory in **Otosclerosis**.

Question 125: What is the most common site for the initiation of otosclerosis?

A. Footplate of stapes
B. Margins of stapes
C. Fissula antefenestrum (Correct Answer)
D. Fissula post fenestram

Explanation: **Explanation:** Otosclerosis is a primary metabolic bone disease of the otic capsule characterized by the replacement of normal dense bone with irregular, vascularized spongy bone. **Why Fissula Antefenestrum is correct:** The **fissula antefenestrum** is a small area of vestigial embryonic cartilage located just **anterior to the oval window**. It is the most common site of origin for otosclerosis (seen in approximately 80-90% of cases). When the disease starts here, it often spreads to the annular ligament and the stapes footplate, leading to "stapedial fixation" and subsequent conductive hearing loss. **Analysis of Incorrect Options:** * **Footplate of stapes:** While the footplate is frequently involved as the disease progresses, it is usually not the primary site of initiation. The disease typically spreads *to* the footplate from the fissula antefenestrum. * **Margins of stapes:** Similar to the footplate, the margins (annular ligament) are involved during the clinical phase of the disease, leading to ankylosis, but they are secondary sites. * **Fissula post fenestram:** This is located posterior to the oval window. While otosclerotic foci can occur here, it is significantly less common than the anterior site. **High-Yield Clinical Pearls for NEET-PG:** * **Schwartze Sign:** A flamingo-pink blush seen through the TM due to increased vascularity of the promontory (active phase). * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz**. * **Gelle’s Test:** Negative (indicates fixed ossicular chain). * **Treatment of Choice:** Stapedotomy (using a Teflon piston). * **Bezold’s Triad:** Includes (1) Raised bone conduction threshold, (2) Negative Rinne test, and (3) Prolonged Schwabach test.

Question 126: A mass in the ear that bleeds heavily on touch is most likely caused by:

A. Glomus jugulare (Correct Answer)
B. Carcinoma of the mastoid
C. Acoustic neuroma
D. Angiofibroma

Explanation: **Explanation:** **Glomus Jugulare** (Paraganglioma) is a highly vascular, benign but locally invasive tumor arising from the glomus bodies in the jugular bulb. Because these tumors are composed of a dense network of thin-walled blood vessels (sinusoids), they are notorious for **profuse bleeding** upon even minor manipulation or biopsy. Clinically, they present with pulsatile tinnitus and a "rising sun" appearance behind the tympanic membrane. **Why other options are incorrect:** * **Carcinoma of the mastoid:** While squamous cell carcinoma can cause blood-stained discharge, it typically presents with deep-seated pain, foul-smelling otorrhea, and cranial nerve palsies. It is not characterized by the same degree of immediate, heavy hemorrhage on touch as a vascular glomus tumor. * **Acoustic neuroma:** This is a tumor of the vestibular nerve (CN VIII) located in the internal auditory canal or cerebellopontine angle. It does not present as a mass in the external or middle ear and does not bleed on touch. * **Angiofibroma:** Although this is a highly vascular tumor that bleeds profusely, it is a **nasopharyngeal** tumor (Juvenile Nasopharyngeal Angiofibroma) and is not primarily found as a mass in the ear. **High-Yield Clinical Pearls for NEET-PG:** * **Phelps Sign:** Loss of bony plate between the jugular bulb and middle ear (seen on CT). * **Brown’s Sign:** Pulsation of the tumor seen on otoscopy, which ceases when ear canal pressure is increased with a Siegle’s speculum. * **Aquino’s Sign:** Blanching of the tympanic mass upon carotid artery compression. * **Gold Standard Investigation:** Contrast-enhanced MRI and MRA; however, **Four-vessel Angiography** is essential for evaluating blood supply and preoperative embolization.

Question 127: Tumarkin's crisis is said to be a variant of which of the following conditions?

A. Glue ear
B. Meniere's disease (Correct Answer)
C. Chronic suppurative otitis media (CSOM)
D. Otosclerosis

Explanation: **Explanation:** **Tumarkin’s Otolithic Crisis** (also known as "Drop Attacks") is a specific clinical variant of **Meniere’s Disease**. It is characterized by sudden, spontaneous falls without loss of consciousness. 1. **Why Meniere’s Disease is correct:** The underlying pathophysiology involves a sudden mechanical deformation of the otolithic organs (the utricle and saccule) due to endolymphatic pressure changes. This causes an abrupt activation of vestibulospinal reflexes, leading to a sudden loss of postural tone. Patients feel as if they are being "pushed to the ground" by an external force. Unlike typical Meniere’s vertigo, these episodes occur without warning and without autonomic symptoms like nausea or vomiting. 2. **Why other options are incorrect:** * **Glue Ear (Otitis Media with Effusion):** This involves fluid in the middle ear causing conductive hearing loss, not episodic vestibular crises. * **CSOM:** This is a chronic infection of the middle ear cleft. While it can cause vertigo if a labyrinthine fistula develops, it does not present as Tumarkin’s crisis. * **Otosclerosis:** This is a metabolic bone disease of the otic capsule causing stapes fixation and conductive hearing loss. While "vestibular otosclerosis" exists, it is rare and distinct from the drop attacks of Meniere’s. **NEET-PG High-Yield Pearls:** * **Lermoyez Syndrome:** Another Meniere’s variant where hearing *improves* during a vertigo attack (the "reverse" of typical Meniere’s). * **Meniere’s Triad:** Episodic vertigo, sensorineural hearing loss (fluctuating, low-frequency), and tinnitus/aural fullness. * **Pathology:** Endolymphatic Hydrops (distension of the endolymphatic system). * **Management of Crisis:** While Meniere's is usually managed medically (salt restriction, Betahistine), frequent Tumarkin’s crises may require surgical intervention (e.g., endolymphatic sac decompression or chemical labyrinthectomy) due to the risk of injury from falls.

Question 128: The Brown sign is seen in which of the following conditions?

A. Glomus tumor (Correct Answer)
B. Meniere's disease
C. Acoustic neuroma
D. Otosclerosis

Explanation: **Explanation:** **Brown Sign** is a classic clinical finding associated with **Glomus Jugulare** or **Glomus Tympanicum** (Paragangliomas). These are highly vascular, benign tumors arising from the chemoreceptor cells in the middle ear. **Why it occurs:** When positive pressure is applied to the external auditory canal using a pneumatic otoscope (Siegle’s speculum), the tumor—which appears as a "cherry-red" mass behind the tympanic membrane—blanches and stops pulsating. This happens because the increased pressure temporarily overcomes the intratumoral capillary pressure. **Analysis of Incorrect Options:** * **Meniere’s Disease:** Characterized by the triad of vertigo, tinnitus, and sensorineural hearing loss due to endolymphatic hydrops. It does not involve a vascular middle ear mass. * **Acoustic Neuroma:** A tumor of the 8th cranial nerve (vestibular schwannoma) located in the internal auditory canal or cerebellopontine angle. It presents with retrocochlear hearing loss, not middle ear signs. * **Otosclerosis:** Presents with conductive hearing loss due to stapes fixation. A relevant sign here is **Schwartz sign** (a flamingo-pink flush on the promontory), which represents active otosclerosis, not a vascular tumor. **High-Yield Clinical Pearls for NEET-PG:** * **Aquino’s Sign:** Pulsations of the glomus tumor decrease or disappear upon manual compression of the ipsilateral common carotid artery. * **Phelps’ Sign:** Loss of the bony plate between the jugular bulb and the middle ear (seen on CT). * **Rising Sun Appearance:** The red vascular mass seen behind an intact tympanic membrane. * **Pulsatile Tinnitus:** The most common presenting symptom of Glomus tumors.

Question 129: Which of the following conditions presents with conductive hearing loss and an intact tympanic membrane?

A. Presbycusis
B. Meniere's disease
C. Otosclerosis (Correct Answer)
D. Otosclerosis

Explanation: **Explanation:** The clinical presentation of **Conductive Hearing Loss (CHL) with an intact tympanic membrane** is a classic diagnostic hallmark of **Otosclerosis**. **1. Why Otosclerosis is correct:** Otosclerosis is a localized disease of the otic capsule characterized by abnormal bone remodeling. The most common form is **stapedial otosclerosis**, where a focus of new bone (usually at the *fissula ante fenestram*) causes fixation of the stapes footplate in the oval window. This prevents the mechanical transmission of sound vibrations to the cochlea, resulting in CHL. Since the pathology is medial to the eardrum, the tympanic membrane remains normal and intact on otoscopy. **2. Why other options are incorrect:** * **Presbycusis (Option A):** This is age-related hearing loss. It is a **Sensorineural Hearing Loss (SNHL)** caused by the degeneration of hair cells in the cochlea or the auditory nerve, not a conduction issue. * **Meniere’s Disease (Option B):** This is an inner ear disorder characterized by endolymphatic hydrops. It presents with a triad of vertigo, tinnitus, and fluctuating **SNHL** (typically affecting low frequencies), not CHL. * *(Note: Option D is a duplicate of the correct answer).* **High-Yield Clinical Pearls for NEET-PG:** * **Schwartze Sign:** A reddish hue seen through the TM due to increased vascularity of the promontory (active stage/Otospongiosis). * **Gelle’s Test:** Negative in otosclerosis (indicates fixed ossicular chain). * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz** on an audiogram. * **Bezold’s Triad:** Includes CHL, negative Rinne test, and increased Bone Conduction (BC) > Air Conduction (AC). * **Treatment of Choice:** Stapedotomy or Stapedectomy.

Question 130: Which part is most commonly involved in otosclerosis?

A. Oval window (Correct Answer)
B. Round window
C. Tympanic membrane
D. Malleus

Explanation: **Explanation:** Otosclerosis is a primary metabolic bone disease of the otic capsule characterized by abnormal bone remodeling, where mature lamellar bone is replaced by vascular spongy bone (otospongiosis) and eventually dense sclerotic bone. **Why Option A is Correct:** The most common site of involvement in otosclerosis is the **fissula ante fenestram**, which is a small area of connective tissue located just **anterior to the oval window**. As the disease progresses, the otosclerotic focus involves the annular ligament, leading to stapedial fixation and subsequent conductive hearing loss. **Why the other options are incorrect:** * **B. Round window:** While the round window can be involved in advanced cases (obliterative otosclerosis), it is less common than the oval window. Involvement here can lead to sensorineural components. * **C. Tympanic membrane:** Otosclerosis is a disease of the bony labyrinth and ossicles; the tympanic membrane remains normal and mobile (though a "Schwartze sign" may be visible through it). * **D. Malleus:** While ossicular fixation can rarely involve the malleus head, the primary and hallmark site of pathology in otosclerosis is the stapes footplate at the oval window. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Triad:** Conductive hearing loss, a normal tympanic membrane, and a family history (Autosomal Dominant with incomplete penetrance). * **Schwartze Sign (Flamingo Flush):** Increased vascularity over the promontory seen in the active (otospongiotic) stage. * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz**. * **Gelle’s Test:** Negative (indicates fixed ossicles). * **Treatment of Choice:** Stapedotomy or Stapedectomy.

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Tympanic Membrane Perforation

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Cholesteatoma

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Tympanoplasty Techniques

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Ossicular Chain Reconstruction

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Mastoidectomy

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Stapedectomy

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Implantable Hearing Devices

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Congenital Aural Atresia

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Otologic Trauma

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Glomus Tumors

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Facial Nerve Decompression

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Rehabilitative Audiology

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Otology — MCQs

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