Cone of light focuses on which quadrant of tympanic membrane?
What is the term for the condition where the tympanic membrane is retracted and touches the promontory?
Retraction of tympanic membrane touching the promontory. What is the classification according to Sade's grading system?
What is the most common cause of ASOM?
Moure's sign (lateral displacement of the soft palate) is associated with which of the following conditions?
All are intracranial complications of otitis media except which of the following?
What condition is characterized by a bluish appearance of the tympanic membrane?
What is the treatment of choice for atticoantral type of chronic suppurative otitis media (CSOM)?
Posterosuperior retraction pocket if allowed to progress will lead to?
During functional endoscopic sinus surgery the position of the patient is
NEET-PG 2013 - ENT NEET-PG Practice Questions and MCQs
Question 11: Cone of light focuses on which quadrant of tympanic membrane?
- A. Anteroinferior (Correct Answer)
- B. Posteroinferior
- C. Anterosuperior
- D. Posterosuperior
Explanation: ***Anteroinferior*** - The **cone of light** (or light reflex) is a characteristic triangular reflection of the otoscope's light, normally visible in the **anteroinferior quadrant** of a healthy tympanic membrane. - Its presence indicates a **healthy, intact eardrum** with normal tension and transparency; its absence or distortion can suggest pathology. *Posteroinferior* - While part of the tympanic membrane, the **posteroinferior quadrant** does not normally exhibit the focused cone of light. - This area is more often associated with the **round window niche** on its medial aspect in relation to the middle ear. *Anterosuperior* - The **anterosuperior quadrant** is located above the handle of the malleus and does not show the cone of light reflection. - This area contains the **anterior malleolar fold** and part of the **pars flaccida** (attic region). *Posterosuperior* - The **posterosuperior quadrant** is also not the usual site for the cone of light. - This area is relevant for the proximity to the **facial nerve** and structures like the **long process of the incus**.
Question 12: What is the term for the condition where the tympanic membrane is retracted and touches the promontory?
- A. Mild tympanic membrane retraction
- B. Severe tympanic membrane retraction
- C. Atelectasis of the tympanic membrane (Correct Answer)
- D. Adhesive otitis media (with middle ear adhesions)
Explanation: ***Atelectasis of the tympanic membrane*** - **Atelectasis of the tympanic membrane** (TM) specifically refers to severe **retraction** where the TM collapses onto the **promontory** or other middle ear structures. - This condition indicates a significant **negative middle ear pressure**, often leading to **conductive hearing loss** and potential long-term complications if not addressed. *Mild tympanic membrane retraction* - **Mild retraction** involves the TM being drawn inward, but it does not typically make contact with the **promontory**. - This is often observed as a prominent **short process of the malleus** or a **sharper cone of light**. *Severe tympanic membrane retraction* - While **severe retraction** describes the degree of inward pulling, **atelectasis** is the more precise term when the TM actually touches the **promontory** or other middle ear structures. - The term **severe retraction** alone might not imply contact with the bony structures of the middle ear. *Adhesive otitis media (with middle ear adhesions)* - **Adhesive otitis media** involves the formation of **fibrous adhesions** within the middle ear space, often as a result of chronic inflammation, which can **fixate** the ossicles or TM. - While severe retraction can be a precursor, **adhesive otitis media** specifically refers to the presence of these **adhesions**, which are not explicitly stated in the question.
Question 13: Retraction of tympanic membrane touching the promontory. What is the classification according to Sade's grading system?
- A. Grade 1
- B. Grade 2
- C. Grade 3 (Correct Answer)
- D. Grade 4
Explanation: ***Grade 3*** - **Grade 3** retraction involves the tympanic membrane making contact with the **promontory** of the middle ear. - This contact indicates significant retraction, often with loss of definition of the malleus handle. *Grade 1* - **Grade 1** retraction is characterized by mild retraction with an **intact cone of light** and good mobility. - The tympanic membrane does not touch any middle ear structures. *Grade 2* - **Grade 2** retraction shows the tympanic membrane touching the **incudostapedial joint** or posterior wall of the middle ear. - The handle of the malleus may appear significantly foreshortened. *Grade 4* - **Grade 4** retraction involves **adhesive otitis media**, where the tympanic membrane is severely retracted and fully adherent to the middle ear structures. - This often results in a nearly complete obliteration of the middle ear space.
Question 14: What is the most common cause of ASOM?
- A. Meningococci
- B. Pneumococci (Correct Answer)
- C. H. influenzae
- D. Moraxella catarrhalis
Explanation: ***Pneumococci*** - **_Streptococcus pneumoniae_ (Pneumococci)** is the **most common bacterial cause** of Acute Suppurative Otitis Media (ASOM) in all age groups, particularly in young children. - It accounts for an estimated 25-50% of all ASOM cases, often leading to significant inflammation and **purulent discharge**. *Meningococci* - **_Neisseria meningitidis_ (Meningococci)** is rarely a cause of ASOM. - It is primarily known for causing **meningitis** and **sepsis**, not typically middle ear infections. *H. influenzae* - **_Haemophilus influenzae_ (non-typable)** is the **second most common cause** of ASOM, accounting for 20-40% of cases. - While significant, it is generally less prevalent than _Streptococcus pneumoniae_. *Moraxella catarrhalis* - **_Moraxella catarrhalis_** is another common causative agent of ASOM, responsible for 10-20% of cases. - It is frequently seen in conjunction with other pathogens but is not the most common on its own.
Question 15: Moure's sign (lateral displacement of the soft palate) is associated with which of the following conditions?
- A. Laryngeal carcinoma
- B. Peritonsillar abscess (Correct Answer)
- C. Chronic tonsillitis
- D. Acute epiglottitis
Explanation: ***Peritonsillar abscess (Quinsy)*** - **Moure's sign** refers to the **lateral displacement of the soft palate** toward the affected side, which is a classic finding in **peritonsillar abscess**. - This occurs due to the **accumulation of pus** between the tonsillar capsule and the superior constrictor muscle, causing the soft palate to bulge and deviate. - Other features include **severe throat pain**, trismus, drooling, and a "hot potato" voice. *Laryngeal carcinoma* - **Laryngeal carcinoma** presents with **hoarseness**, dysphagia, and potential airway obstruction. - While laryngeal examination may show mass lesions or vocal cord fixation, **soft palate displacement is not a feature** of laryngeal malignancy. *Chronic tonsillitis* - **Chronic tonsillitis** involves recurrent throat infections with tonsillar hypertrophy and cryptic debris. - It does **not cause acute soft palate displacement** like peritonsillar abscess does. *Acute epiglottitis* - **Acute epiglottitis** is characterized by **supraglottic inflammation** causing severe dysphagia, drooling, and stridor. - The pathology is at the **epiglottis level**, not the peritonsillar space, so **Moure's sign is absent**.
Question 16: All are intracranial complications of otitis media except which of the following?
- A. Brain abscess
- B. Hydrocephalus
- C. Lateral sinus thrombophlebitis
- D. Facial nerve palsy (Correct Answer)
Explanation: ***Facial nerve palsy*** - This is an **extracranial complication** of otitis media affecting the **facial nerve within the temporal bone**, not an intracranial structure. - The facial nerve (CN VII) runs through the **fallopian canal** in the temporal bone and can be affected by inflammation from adjacent mastoid or middle ear infection. - Classified as a **temporal bone complication** rather than an intracranial complication. *Lateral sinus thrombophlebitis* - This is a true **intracranial complication** involving thrombosis of the **sigmoid and lateral venous sinuses** within the cranial cavity. - Results from direct extension of infection through the **mastoid tegmen** or via septic thrombophlebitis. - Presents with features of sepsis, headache, and papilledema. *Brain abscess* - A severe **intracranial complication** representing focal suppurative infection within the **brain parenchyma** (commonly temporal lobe or cerebellum). - Occurs through direct extension via bony erosion, retrograde thrombophlebitis, or hematogenous spread. - Requires urgent neurosurgical intervention. *Hydrocephalus* - An **intracranial complication** that can occur secondary to **otogenic meningitis** or **lateral sinus thrombosis**. - Results from impaired CSF absorption or obstruction of CSF pathways. - More common in pediatric otitis media with CNS complications.
Question 17: What condition is characterized by a bluish appearance of the tympanic membrane?
- A. Otitis media with effusion (Correct Answer)
- B. Chronic suppurative otitis media
- C. Normal tympanic membrane
- D. Tympanic membrane perforation
Explanation: ***Otitis media with effusion (with hemotympanum)*** - A bluish appearance of the tympanic membrane is characteristically seen when there is **blood in the middle ear space (hemotympanum)**, which can occur in **otitis media with effusion containing hemorrhagic fluid**. - The blue discoloration results from **blood or hemorrhagic effusion** behind the intact tympanic membrane, which imparts a blue or purple hue when visualized through the translucent drum. - This can occur with **traumatic hemotympanum** (basal skull fracture, temporal bone trauma), **hemorrhagic OME**, or in patients with **bleeding disorders**. - Classic causes of blue tympanic membrane include middle ear hemorrhage associated with effusion. *Chronic suppurative otitis media* - CSOM typically involves persistent **purulent (pus-filled) discharge** and often a **perforation of the tympanic membrane**. - The tympanic membrane in CSOM is usually **inflamed, thickened, or perforated**, with active mucopurulent drainage rather than a bluish tinge. - The blue discoloration specifically indicates **blood in the middle ear**, not purulent infection. *Normal tympanic membrane* - A normal tympanic membrane is **pearly gray, translucent**, and mobile, with a visible cone of light and normal middle ear landmarks. - It does not exhibit bluish discoloration, which specifically indicates **underlying hemorrhage or hemorrhagic fluid** in the middle ear space. *Tympanic membrane perforation* - A perforation is a **visible hole or defect in the eardrum**, often with evidence of drainage. - While perforations can occur with various middle ear pathologies, a **blue/purple discoloration of an intact drum** specifically indicates **hemotympanum** (blood behind the membrane), not a perforation itself.
Question 18: What is the treatment of choice for atticoantral type of chronic suppurative otitis media (CSOM)?
- A. Tympanoplasty
- B. Modified radical mastoidectomy (Correct Answer)
- C. None of the options
- D. Antibiotics
Explanation: ***Modified radical mastoidectomy*** - The **atticoantral type of CSOM** is characterized by active **cholesteatoma**, which requires surgical removal to prevent further bone erosion and complications. - A **modified radical mastoidectomy** is the treatment of choice as it removes the cholesteatoma and diseased mastoid air cells while aiming to preserve residual hearing. *Antibiotics* - While topical or systemic antibiotics may be used to control acute infections or discharge in CSOM, they do not eradicate **cholesteatoma**. - **Cholesteatoma** is an epidermoid cyst that requires surgical excision, as antibiotics alone cannot resolve it. *Tympanoplasty* - **Tympanoplasty** is primarily performed to reconstruct the tympanic membrane (eardrum) and/or the ossicular chain to restore hearing. - It is typically indicated for the **tubotympanic type of CSOM** (safe type) without cholesteatoma, not for the atticoantral type which involves cholesteatoma. *None of the options* - This option is incorrect because **modified radical mastoidectomy** is a well-established and necessary treatment for the atticoantral type of CSOM involving cholesteatoma.
Question 19: Posterosuperior retraction pocket if allowed to progress will lead to?
- A. SNHL
- B. Secondary cholesteatoma
- C. Primary cholesteatoma (Correct Answer)
- D. Tympanosclerosis
Explanation: ***Primary cholesteatoma*** - A posterosuperior retraction pocket is a common precursor to the development of a **primary cholesteatoma**. - This pocket, formed by **negative pressure** in the middle ear, accumulates **desquamated keratin** and can erode surrounding bone. *SNHL* - While a cholesteatoma can ultimately cause **sensorineural hearing loss (SNHL)** due to extensive bone erosion affecting the inner ear, it is a later complication, not the direct outcome of the initial retraction pocket itself. - **SNHL** is more commonly associated with conditions directly damaging the **cochlea or auditory nerve**. *Secondary cholesteatoma* - A **secondary cholesteatoma** typically arises from a perforation in the tympanic membrane where skin migrates into the middle ear, not from an intact retraction pocket. - This condition is also known as a **'migratory'** or **'acquired'** cholesteatoma. *Tympanosclerosis* - **Tympanosclerosis** involves the formation of **hyalinized collagen and calcium deposits** within the tympanic membrane or middle ear mucosa, resulting from chronic inflammation or previous trauma. - It is a **fibrotic healing response** and does not directly result from a retraction pocket, although both can be sequelae of chronic otitis media.
Question 20: During functional endoscopic sinus surgery the position of the patient is
- A. Lateral
- B. Lithotomy
- C. Reverse Trendelenburg (Correct Answer)
- D. Trendelenburg
Explanation: ***Reverse Trendelenburg*** - This position helps to reduce **venous congestion** in the surgical field, which is crucial for maintaining clear visibility during **functional endoscopic sinus surgery (FESS)**. - It minimizes **bleeding** by allowing gravity to drain blood away from the head and neck, improving surgical precision and safety. *Trendelenburg* - This position involves tilting the patient with the head lower than the feet, which would increase **venous pressure** in the head and neck. - Increased venous congestion would lead to significant **bleeding**, severely impairing visibility during FESS. *Lateral* - The lateral position is generally used for procedures involving the **side of the body**, such as kidney surgery or lung procedures. - It does not provide the optimal ergonomic access or venous drainage benefits required for **endoscopic sinus surgery**. *Lithotomy* - The lithotomy position is characterized by the patient lying on their back with hips and knees flexed and supported, primarily used for **pelvic or perineal procedures**. - This position is entirely inappropriate for **head and neck surgery** as it does not allow proper access to the sinus area.