Otology — MCQs
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Fenestration operation is which type of tympanoplasty?
Hyperacusis is associated with all of the following conditions except:
Schwartze sign is seen in:
Phelps sign is seen in:
What is the treatment of choice for atticoantral type of chronic suppurative otitis media?
What type of prosthesis is commonly used during stapes surgery for otosclerosis?
Otology Indian Medical PG Practice Questions and MCQs
Question 321: Fenestration operation is which type of tympanoplasty?
- A. Type-3
- B. Type-2
- C. Type-4
- D. Type-5 (Correct Answer)
Explanation: ***Type-5*** - **Fenestration operation** is classified as **Type V tympanoplasty** in Wullstein's classification. - This procedure creates a **new fenestra (window) in the lateral semicircular canal** to bypass a fixed oval window/stapes in cases of **otosclerosis**. - Sound waves are directed to this new window, bypassing the immobile stapes footplate. - Historically important procedure before **stapedectomy** became the standard treatment for otosclerosis. *Type-2* - **Type II tympanoplasty** involves repair with a **partially eroded malleus** where the graft is placed onto the **incus or remaining malleus**. - Requires an intact and mobile stapes, unlike fenestration which bypasses a fixed stapes. - Used for tympanic membrane perforations with minor ossicular damage. *Type-3* - **Type III tympanoplasty** involves placing the graft directly onto the **stapes head** (columella effect). - Performed when malleus and incus are eroded but stapes is intact and mobile. - This is **myringostapediopexy**, not fenestration. *Type-4* - **Type IV tympanoplasty** involves creating a **small middle ear cavity** with the graft placed over the **round window**. - Used when the stapes arch is absent but the footplate is mobile. - Different from fenestration as it utilizes the round window, not a semicircular canal fenestra.
Question 322: Hyperacusis is associated with all of the following conditions except:
- A. Otosclerosis (Correct Answer)
- B. Acoustic neuroma
- C. Exposure to loud sounds
- D. Meniere's disease
Explanation: ***Otosclerosis*** - **This is the correct answer** as otosclerosis is **NOT typically associated with hyperacusis** in the classical presentation. - **Otosclerosis** primarily causes **progressive conductive hearing loss** due to abnormal bone growth leading to stapes fixation. - While **stapedial reflex absence** (due to stapes fixation) theoretically could contribute to sound sensitivity, **hyperacusis is not a characteristic clinical feature** of otosclerosis in standard teaching. - The conductive hearing loss itself tends to **reduce sound perception** rather than increase sensitivity to environmental sounds. *Exposure to loud sounds* - **Noise-induced hearing loss** and acoustic trauma are **well-documented causes of hyperacusis**. - Damage to outer hair cells and central auditory processing changes following noise exposure can lead to **increased gain** in the auditory system, resulting in hyperacusis. - This is part of the spectrum of conditions affecting the inner ear following acoustic trauma. *Acoustic neuroma* - An **acoustic neuroma** (vestibular schwannoma) is a tumor on the vestibulocochlear nerve that can cause **hyperacusis**. - The tumor's pressure on the auditory nerve pathways or involvement of the facial nerve (affecting stapedius function) can disrupt normal sound processing. - Hyperacusis is a **recognized symptom** in acoustic neuroma patients. *Meniere's disease* - Patients with **Meniere's disease** frequently experience **hyperacusis** along with the classic triad of fluctuating hearing loss, vertigo, and tinnitus. - The **endolymphatic hydrops** and inner ear fluid imbalance characteristic of Meniere's can alter auditory perception, making sounds abnormally loud or uncomfortable. - Hyperacusis in Meniere's often fluctuates with disease activity.
Question 323: Schwartze sign is seen in:
- A. Glomus Jugulare
- B. Otosclerosis (Correct Answer)
- C. Acoustic neuroma
- D. Meniere's disease
Explanation: ***Correct Option: Otosclerosis*** - **Schwartze sign** is observed during otoscopy as a **reddish blush** on the promontory of the middle ear visible through the tympanic membrane. - This sign indicates **active otospongiosis**, where new vascularized spongy bone formation is occurring around the stapes footplate, leading to conductive hearing loss due to stapes fixation. - The reddish appearance is due to increased vascularity in the active phase of otosclerosis. *Incorrect Option: Glomus Jugulare* - This is a **highly vascular tumor** that can cause **pulsatile tinnitus** and a red mass behind the eardrum. - While it can appear reddish, the characteristic **Schwartze sign blush** is not associated with this condition; rather, a glomus tumor would show a direct, often pulsatile, vascular mass with a **rising sun sign**. *Incorrect Option: Meniere's disease* - Characterized by **vertigo**, **tinnitus**, **aural fullness**, and fluctuating **sensorineural hearing loss**. - It does not present with any specific otoscopic findings like the Schwartze sign, which is related to bone remodeling in the middle ear. *Incorrect Option: Acoustic neuroma* - This is a **benign tumor** of the **vestibulocochlear nerve (CN VIII)**, typically presenting with **unilateral progressive sensorineural hearing loss**, tinnitus, and imbalance. - Otoscopic examination is usually normal, and there are no specific middle ear signs like the Schwartze sign associated with this condition.
Question 324: Phelps sign is seen in:
- A. Glomus jugulare (Correct Answer)
- B. Neurofibromatosis
- C. Meniere's disease
- D. Vestibular Schwannoma
Explanation: ***Glomus jugulare*** - **Phelps sign** (also known as the **“J” sign** or **jugular foramen sign**) on imaging is characteristic of **glomus jugulare tumors**, indicating erosion of the jugular foramen. - This sign refers to the destruction of the **jugular spine**, which is the bony ridge separating the jugular foramen from the carotid canal. *Vestibular Schwannoma* - **Vestibular schwannomas** typically arise from the **vestibulocochlear nerve** within the internal auditory canal and cerebellopontine angle, not the jugular foramen. - While they can cause hearing loss and balance issues, their characteristic imaging findings are **enhancement within the internal auditory canal** and expansion of the canal itself. *Meniere's disease* - **Meniere's disease** is an inner ear disorder characterized by episodes of vertigo, fluctuating hearing loss, tinnitus, and aural fullness. - It is diagnosed clinically and does not present with specific imaging signs like Phelps sign, as it is related to **endolymphatic hydrops**. *Neurofibromatosis* - **Neurofibromatosis** is a genetic disorder associated with the growth of tumors on nerves throughout the body. While it can involve the head and neck (e.g., bilateral vestibular schwannomas in NF2), Phelps sign is not a characteristic imaging finding. - Imaging in neurofibromatosis would show **multiple neurofibromas** or specific nerve sheath tumors depending on the type (NF1 or NF2).
Question 325: What is the treatment of choice for atticoantral type of chronic suppurative otitis media?
- A. Tympanoplasty
- B. Modified radical mastoidectomy (Correct Answer)
- C. Antibiotics
- D. None of the options
Explanation: ***Modified radical mastoidectomy*** - This procedure is the treatment of choice for **atticoantral type of chronic suppurative otitis media (CSOM)** due to the presence of **cholesteatoma**, which requires complete surgical removal. - It involves removing the posterior and superior canal wall, exenterating the mastoid air cells, and exteriorizing the **aditus and antrum** into the external auditory canal to create a common cavity. - Unlike radical mastoidectomy, it **attempts to preserve the tympanic membrane and ossicular chain when disease extent permits**, thereby maintaining the middle ear transformer mechanism and optimizing hearing outcomes. *Antibiotics* - While antibiotics may be used to manage acute exacerbations or infections, they cannot eradicate the inherent **cholesteatoma** found in atticoantral CSOM. - They primarily target bacteria and have no effect on the **pathological skin growth** that characterizes cholesteatoma. *Tympanoplasty* - **Tympanoplasty** is a reconstructive procedure primarily used for repairing a **perforated tympanic membrane** or ossicular chain defects, typically in the tubotympanic type of CSOM. - It does not address the fundamental problem of **cholesteatoma** and its destructive potential in atticoantral disease. *None of the options* - This is incorrect because **modified radical mastoidectomy** is a well-established and effective treatment for atticoantral CSOM. - Omitting treatment would lead to progressive destruction of middle ear structures and potentially life-threatening complications.
Question 326: What type of prosthesis is commonly used during stapes surgery for otosclerosis?
- A. Teflon piston (Correct Answer)
- B. Ventilation tube
- C. Total ossicular replacement prosthesis
- D. Partial ossicular replacement prosthesis (PORP)
Explanation: ***Teflon piston*** - A **Teflon piston** is a common and effective prosthesis for replacing the **stapes** in **otosclerosis** surgery. - It connects the **incus** to the **oval window**, restoring sound conduction. - Other materials like **titanium** are also commonly used for stapes prostheses. *Ventilation tube* - A **ventilation tube** (grommet) is typically used for **middle ear effusions** or **eustachian tube dysfunction**, not for ossicular chain reconstruction in otosclerosis. - It creates an opening in the **tympanic membrane** to equalize pressure, which is unrelated to the stapes' function. *Total ossicular replacement prosthesis (TORP)* - A **TORP** is used when the entire **ossicular chain** (malleus, incus, and stapes) is significantly damaged or missing, not specifically for isolated stapes fixation from otosclerosis. - It bypasses the intact portions of the ossicular chain and connects directly to the **tympanic membrane** and **oval window**. *Partial ossicular replacement prosthesis (PORP)* - A **PORP** is used when the **stapes superstructure is intact** but the incus is damaged or absent. - In otosclerosis, the stapes **footplate is fixed**, requiring removal and replacement with a piston prosthesis, not a PORP. - PORP connects the tympanic membrane (or malleus) to the stapes head, which is different from stapes surgery.
Practice by Chapter
Tympanic Membrane Perforation
Practice Questions
Cholesteatoma
Practice Questions
Tympanoplasty Techniques
Practice Questions
Ossicular Chain Reconstruction
Practice Questions
Mastoidectomy
Practice Questions
Stapedectomy
Practice Questions
Implantable Hearing Devices
Practice Questions
Congenital Aural Atresia
Practice Questions
Otologic Trauma
Practice Questions
Glomus Tumors
Practice Questions
Facial Nerve Decompression
Practice Questions
Rehabilitative Audiology
Practice Questions
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