Otology Practice Questions

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

Otosclerosis. **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.

Q: Which part is most commonly involved in otosclerosis?

Oval window. **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.

Q: What is the most common bony tumor of the middle ear?

Squamous cell carcinoma. **Explanation:** The question asks for the most common **bony tumor** (malignant neoplasm involving the bone) of the middle ear. **1. Why Squamous Cell Carcinoma (SCC) is correct:** Squamous cell carcinoma is the most common primary malignancy of the middle ear and external auditory canal. While the middle ear is lined by respiratory epithelium, chronic irritation (often due to long-standing chronic suppurative otitis media or CSOM) leads to squamous metaplasia, eventually progressing to SCC. It is highly invasive, frequently eroding the temporal bone and surrounding structures, making it the most common "bony" (malignant) tumor encountered in this region. **2. Why other options are incorrect:** * **Adenoid Cystic Carcinoma:** This is a rare malignancy usually arising from the ceruminous glands of the external ear or minor salivary glands. It is far less common than SCC. * **Glomus Tumor (Paraganglioma):** This is the most common **benign** tumor of the middle ear (Glomus Tympanicum). While it is highly vascular and can erode bone, it is not a "bony tumor" by classification; it is a neuroendocrine tumor. * **Acoustic Neuroma (Vestibular Schwannoma):** This is the most common tumor of the **Cerebellopontine (CP) angle**, not the middle ear. It arises from the sheath of the vestibular nerve. **Clinical Pearls for NEET-PG:** * **Most common benign tumor of middle ear:** Glomus Tympanicum. * **Most common malignancy of middle ear:** Squamous Cell Carcinoma. * **Red Flag:** Any case of "chronic ear discharge with blood-stained debris and deep-seated pain" should be investigated for SCC. * **Radiology:** High-resolution CT (HRCT) is the gold standard to assess the extent of bone destruction in middle ear SCC.

Q: A 35-year-old pregnant female complains of hearing loss that aggravated during pregnancy. Tympanometry was performed. Which of the following tympanometry patterns will be seen?

As. ***As*** - Hearing loss worsening during pregnancy is classic for **otosclerosis**, which causes **stapes fixation** and increased stiffness of the ossicular chain. - Type **As tympanogram** shows **reduced compliance** (shallow peak) at normal middle ear pressure, indicating ossicular chain stiffness. *Ad* - Type **Ad tympanogram** indicates **ossicular discontinuity** with abnormally high compliance and deep peak. - This would cause **conductive hearing loss** but is not associated with pregnancy-related worsening. *B* - Type **B tympanogram** shows **flat curve** with no identifiable peak, indicating **middle ear effusion** or **tympanic membrane perforation**. - This pattern does not correlate with **pregnancy-induced hearing loss** or otosclerosis. *C* - Type **C tympanogram** shows **negative middle ear pressure** with peak shifted to the left, indicating **Eustachian tube dysfunction**. - This typically causes **mild conductive hearing loss** but is not characteristically worsened by pregnancy.

Q: The columella effect is observed in which surgical procedure?

Tympanoplasty. **Explanation:** The **Columella Effect** is a fundamental principle in middle ear reconstructive surgery, specifically **Tympanoplasty**. In a normal ear, the surface area ratio between the tympanic membrane and the stapes footplate (17:1) creates a hydraulic pressure gain. When the ossicular chain is damaged but the stapes remains mobile, surgeons perform a **Type III Tympanoplasty**. In this procedure, the tympanic membrane (or a graft) is placed directly in contact with the head of the stapes. This creates a "columella" (a single bone link), similar to the anatomy found in birds. This direct transmission of sound from the drum to the stapes bypasses the malleus and incus, maintaining an effective, albeit reduced, sound conduction mechanism. **Analysis of Options:** * **A. Tympanoplasty (Correct):** As described, the columella effect is the physiological basis for Type III tympanoplasty, ensuring sound reaches the oval window directly via the stapes. * **B. Septoplasty:** This is a surgical procedure to straighten a deviated nasal septum. It involves the nasal airway and has no physiological connection to middle ear sound conduction. * **C. Tracheostomy:** This is an operative procedure to create an opening in the trachea to facilitate breathing. It does not involve the auditory apparatus. **High-Yield Clinical Pearls for NEET-PG:** * **Wullstein’s Classification:** Remember that Type III Tympanoplasty is specifically known as the **"Myringostapediopexy"** or the Columella technique. * **Acoustic Separation:** In cases where the ossicular chain is absent, the goal is to provide sound protection for the round window while sound is directed to the oval window (the "Shield Effect"). * **Prerequisite:** For the columella effect to be successful, the stapes footplate must be **mobile**. If it is fixed, a stapedectomy or fenestration is required.

Q: Carhart's notch is seen in which of the following conditions?

Otosclerosis. **Explanation:** **Carhart’s Notch** is a classic audiometric finding pathognomonic for **Otosclerosis**. It is a pseudo-sensorineural hearing loss characterized by a dip in the bone conduction threshold, most prominent at **2000 Hz**. The underlying mechanism is not true nerve damage, but rather a mechanical artifact. In a normal ear, the resonance of the ossicular chain contributes to bone conduction sensitivity. In otosclerosis, stapes fixation disrupts this natural resonance and reduces the efficiency of the inertial component of bone conduction. Following a successful stapedectomy, this notch typically disappears, confirming its mechanical nature. **Analysis of Incorrect Options:** * **Acoustic Neuroma:** This is a retrocochlear lesion presenting with asymmetrical sensorineural hearing loss (SNHL) and poor word recognition scores. It does not show a specific 2kHz bone conduction dip. * **Meniere’s Disease:** Characterized by fluctuating low-frequency SNHL (rising audiogram) and recruitment, rather than a mechanical bone conduction notch. * **Chronic Suppurative Otitis Media (CSOM):** Typically presents with conductive hearing loss due to TM perforation or ossicular necrosis, but lacks the specific 2000 Hz dip associated with stapes fixation. **High-Yield Clinical Pearls for NEET-PG:** * **Schwartz Sign:** A flamingo-pink flush seen on the promontory through the TM, indicating active otosclerosis (otospongiosis). * **Gelle’s Test:** Negative in otosclerosis (no change in hearing with increased ear canal pressure). * **Tympanometry:** Usually shows an **As type** (Admittance stiffened) curve. * **Stapedial Reflex:** This is the earliest sign to disappear in otosclerosis. * **Treatment of Choice:** Stapedotomy (preferred over stapedectomy).

Q: Which virus is known to cause unilateral sensorineural hearing loss?

Mumps. **Explanation:** **Mumps** is the most common viral cause of **sudden, profound, unilateral sensorineural hearing loss (SNHL)** in children and young adults. The virus causes endolymphatic labyrinthitis, leading to the destruction of the hair cells in the Organ of Corti and the stria vascularis. While the parotitis is usually bilateral, the associated hearing loss is characteristically unilateral and often permanent. **Analysis of Options:** * **Rubella (Option A):** Congenital Rubella Syndrome typically causes **bilateral**, severe to profound SNHL (often described as a "cookie-bite" audiogram). It is a classic cause of congenital deafness rather than acquired unilateral loss. * **Herpes Simplex (Option C):** While HSV is implicated in conditions like Bell’s Palsy or vestibular neuritis, it is not the primary viral association for isolated unilateral SNHL. * **Epstein-Barr Virus (Option D):** EBV can cause infectious mononucleosis and is associated with Nasopharyngeal Carcinoma, but it is a rare cause of sensorineural hearing loss. **Clinical Pearls for NEET-PG:** * **Mumps:** The hearing loss is typically sudden in onset and may occur even in the absence of clinical parotitis. * **Measles:** Usually causes **bilateral** SNHL. * **Labyrinthitis:** Viral labyrinthitis (often following a URI) is another common cause of sudden unilateral SNHL, but among specific named viruses, Mumps is the classic examiner favorite. * **Management:** Sudden SNHL is a medical emergency; the treatment of choice is systemic (and sometimes intratympanic) corticosteroids.

Q: Paracusis Willisii is seen in which of the following conditions?

Otosclerosis. **Explanation:** **Paracusis Willisii** is a clinical phenomenon where a patient with hearing loss paradoxically hears better in a noisy environment (e.g., in a moving train or a crowded market). **1. Why Otosclerosis is the correct answer:** In **Otosclerosis**, the patient suffers from conductive hearing loss (CHL). In a noisy environment, normal-hearing people naturally raise their voice volume to overcome background noise (the Lombard effect). Because the CHL in Otosclerosis acts as a "filter" that masks out the low-frequency background noise, the patient can hear the elevated speech of others much more clearly than they would in a quiet room. This is a classic hallmark of stapedial otosclerosis. **2. Why the other options are incorrect:** * **Meniere’s Disease:** This is a sensory-neural hearing loss (SNHL) condition. Patients often experience recruitment (abnormal loudness growth) and intolerance to loud noises, making noisy environments difficult. * **Glomus Tumor:** This typically presents with pulsatile tinnitus and conductive hearing loss, but Paracusis Willisii is not a characteristic feature. * **Tubercular Otitis Media:** This presents with painless ear discharge, multiple perforations, and profound hearing loss, but does not specifically exhibit this phenomenon. **High-Yield Clinical Pearls for NEET-PG:** * **Schwartze Sign (Flamingo Flush):** Reddish hue on the promontory seen in active otosclerosis (Otospongiosis). * **Carhart’s Notch:** A characteristic dip in the bone conduction curve at **2000 Hz** seen in Otosclerosis. * **Gelle’s Test:** Negative in Otosclerosis (indicates a fixed ossicular chain). * **Treatment of Choice:** Stapedotomy (using a Teflon piston). * **Medical Treatment:** Sodium Fluoride (inhibits osteoclastic activity).

Q: A 31-year-old female patient complains of bilateral hearing impairment for the past 5 years. On examination, the tympanic membrane is normal, and the audiogram shows bilateral conductive deafness. Acoustic reflexes are absent. Which of the following constitutes part of the treatment EXCEPT?

Gentamicin. ### Explanation The clinical presentation of a young female with bilateral progressive conductive hearing loss, a normal tympanic membrane, and absent acoustic reflexes is a classic description of **Otosclerosis**. **Why Gentamicin is the Correct Answer (The "Except"):** Gentamicin is an **aminoglycoside antibiotic** known for its significant **vestibulotoxicity**. In ENT, it is used therapeutically for chemical labyrinthectomy in refractory cases of Meniere’s disease to destroy vestibular hair cells. It has no role in treating Otosclerosis; in fact, its ototoxic profile could potentially worsen hearing or cause vestibular dysfunction. **Analysis of Other Options:** * **A. Hearing Aid:** This is the safest non-surgical management option for patients who do not wish to undergo surgery or are unfit for it. * **B. Stapedectomy:** This is the **surgical treatment of choice**. It involves replacing the fixed stapes footplate with a prosthesis to restore the ossicular chain's mobility. * **C. Sodium Fluoride:** This is the **medical treatment** used in the active phase of the disease (Otospongiosis). It inhibits bone resorption and promotes the maturation of spongy bone into dense bone, potentially slowing the progression of sensorineural hearing loss. **Clinical Pearls for NEET-PG:** * **Schwartz Sign:** A flamingo-pink flush seen on the promontory through the TM, indicating active otospongiosis. * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz** on an audiogram. * **Gelle’s Test:** Negative in otosclerosis (indicates stapes fixation). * **Stapedial Reflex:** The earliest sign of otosclerosis is the "on-off effect" (diphasic impedance change), followed by total absence of the reflex.

Question 1

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

Accepted Answer

Otosclerosis

Answer

Presbycusis

Answer

Meniere's disease

Question 2

Which part is most commonly involved in otosclerosis?

Accepted Answer

Oval window

Answer

Round window

Answer

Tympanic membrane

Answer

Malleus

Question 3

What is the most common bony tumor of the middle ear?

Accepted Answer

Squamous cell carcinoma

Answer

Adenoid cystic carcinoma

Answer

Glomus tumor

Answer

Acoustic neuroma

Question 4

A 35-year-old pregnant female complains of hearing loss that aggravated during pregnancy. Tympanometry was performed. Which of the following tympanometry patterns will be seen?

Accepted Answer

As

Answer

Ad

Answer

B

Answer

C

Question 5

The columella effect is observed in which surgical procedure?

Accepted Answer

Tympanoplasty

Answer

Septoplasty

Answer

Tracheostomy

Answer

None of the above

Question 6

Carhart's notch is seen in which of the following conditions?

Accepted Answer

Otosclerosis

Answer

Acoustic neuroma

Answer

Meniere's disease

Answer

Chronic suppurative otitis media

Question 7

What is the treatment of choice for perforation in the pars flaccida of the tympanic membrane with cholesteatoma?

Accepted Answer

Modified radical mastoidectomy

Answer

Myringoplasty

Answer

Antibiotics

Answer

Radical mastoidectomy

Question 8

Which virus is known to cause unilateral sensorineural hearing loss?

Accepted Answer

Mumps

Answer

Rubella

Answer

Herpes simplex

Answer

Epstein-Barr virus

Question 9

Paracusis Willisii is seen in which of the following conditions?

Accepted Answer

Otosclerosis

Answer

Meniere's disease

Answer

Glomus tumor

Answer

Tubercular otitis media

Question 10

A 31-year-old female patient complains of bilateral hearing impairment for the past 5 years. On examination, the tympanic membrane is normal, and the audiogram shows bilateral conductive deafness. Acoustic reflexes are absent. Which of the following constitutes part of the treatment EXCEPT?

Accepted Answer

Gentamicin

Answer

Hearing aid

Answer

Stapedectomy

Answer

Sodium fluoride

Otology — MCQs

Otology — MCQs

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