Oculoplasty Practice Questions

Q: What is the most common malignant tumour of eyelid?

Basal cell cancer. ***Basal cell cancer*** - **Basal cell carcinoma (BCC)** is by far the most common malignant tumor of the eyelid, accounting for approximately **90% of all eyelid malignancies**. - It typically appears as a **slow-growing nodule** with rolled borders, central ulceration, and telangiectasias, most commonly affecting the **lower eyelid and medial canthus**. - BCC is strongly associated with **chronic UV radiation exposure** and rarely metastasizes, but can cause significant local tissue destruction if untreated. *Sebaceous gland carcinoma* - **Sebaceous gland carcinoma** (also known as meibomian gland carcinoma) is a rare but aggressive malignant tumor arising from the sebaceous glands of the eyelid. - It accounts for approximately **1-5% of eyelid malignancies** and has a higher risk of metastasis compared to BCC. - More common in **Asian populations** and often masquerades as chronic blepharoconjunctivitis, leading to delayed diagnosis. *Squamous cell carcinoma* - **Squamous cell carcinoma (SCC)** is the **second most common** malignant eyelid tumor, accounting for approximately **5-10% of cases**. - It presents as a firm, erythematous nodule or plaque and has a higher metastatic potential than BCC. - Associated with **UV exposure, HPV infection**, and immunosuppression. *Melanoma* - **Melanoma** is a rare malignant tumor of the eyelid, accounting for less than **1% of eyelid malignancies**. - It arises from melanocytes and carries a significant risk of metastasis and mortality. - Presents as a pigmented lesion with irregular borders, but amelanotic variants can also occur.

Q: Internal hordeolum is due to inflammation of-

Meibomian glands. ***Meibomian glands (Correct)*** - An **internal hordeolum** results from acute **bacterial infection** (usually *Staphylococcus aureus*) and inflammation of a **Meibomian gland**, which are modified sebaceous glands located within the tarsal plate of the eyelid. - These glands produce the **lipid layer** of the tear film, and their blockage and infection lead to a painful, red lump on the **inner surface of the eyelid**. *Moll's gland (Incorrect)* - **Moll's glands** are modified apocrine sweat glands located near the base of the eyelashes. - Inflammation or infection of a Moll's gland would more commonly contribute to an **external hordeolum (stye)**, not an internal one. *Lacrimal gland (Incorrect)* - The **lacrimal gland** produces the watery component of tears and is located in the superotemporal orbit. - Inflammation of the lacrimal gland is called **dacryoadenitis**, which presents with swelling in the outer part of the upper eyelid and is distinct from a hordeolum. *Zeis gland (Incorrect)* - **Zeis glands** are sebaceous glands associated with the hair follicles of the eyelashes. - Similar to Moll's glands, infection of a Zeis gland is a common cause of an **external hordeolum (stye)**, which appears on the eyelid margin.

Q: Appropriate treatment for mild congenital ptosis?

LPS Resection. ***LPS Resection*** - **LPS (levator palpebrae superioris) resection/advancement** is the most common surgical treatment for congenital ptosis, especially in mild to moderate cases. - This procedure strengthens the levator muscle, improving eyelid position and is appropriate when the **levator function is good** (typically greater than 4mm). *Frontalis sling procedure* - The **frontalis sling procedure** is generally reserved for severe congenital ptosis with poor levator function (<4mm) or in cases where the levator muscle is absent or highly dysfunctional. - It uses the frontalis muscle to lift the eyelid indirectly, which is less ideal for mild ptosis. *Antibiotics and hot compression* - **Antibiotics and hot compression** are treatments for infectious or inflammatory conditions of the eyelid, such as a **hordeolum** (stye) or **chalazion**. - They are not effective treatments for anatomical defects like congenital ptosis, which requires surgical intervention. *Wedge resection of conjunctiva* - **Wedge resection of the conjunctiva** might be used in some cases of conjunctival prolapse or for correction of specific conjunctival lesions or abnormalities. - It is not a standard or appropriate treatment for congenital ptosis.

Q: In dacryocystorhinostomy (DCR), Lacrimal sac opens into:

Middle meatus. ***Middle meatus*** - In **dacryocystorhinostomy (DCR)**, a new connection is created between the lacrimal sac and the **nasal cavity**, specifically directing tears into the middle meatus. - This surgical procedure aims to bypass an obstruction in the **nasolacrimal duct**, allowing tears to drain directly into the nasal passage through this newly formed opening. *Supreme meatus* - The supreme meatus is a **rare anatomical variation**, located superior to the superior meatus, and is not the standard site for lacrimal drainage. - Surgical intervention in DCR does not target this region for tear evacuation. *Inferior meatus* - The **nasolacrimal duct** normally drains into the inferior meatus, but DCR is performed when this duct is **obstructed**. - Connecting the lacrimal sac directly to the inferior meatus is not the typical surgical approach for DCR. *Superior meatus* - The superior meatus receives drainage from the **posterior ethmoid cells** and the **sphenoid sinus**. - It is not the anatomical location for the lacrimal drainage system, nor is it the target for DCR.

Q: Chronic granulomatous inflammation in upper lid (painless swelling) is characteristic of:

Chalazion. ***Chalazion*** - A chalazion is a **chronic**, sterile, **lipogranulomatous** inflammation of the **meibomian glands**. - It presents as a **painless**, firm, round swelling in the eyelid, often in the upper lid due to the larger meibomian glands. *Trachoma* - Trachoma is a **chronic keratoconjunctivitis** caused by *Chlamydia trachomatis*. - It primarily affects the conjunctiva and cornea, leading to scarring, entropion, and eventual blindness, not a painless eyelid swelling. *Internal Hordeolum* - An internal hordeolum is an **acute** bacterial infection of a **meibomian gland**, forming an abscess. - It is typically **painful**, red, and tender, contrasting with the painless nature of the given presentation. *External hordeolum* - An external hordeolum (stye) is an **acute** bacterial infection of the **glands of Zeis or Moll** at the lid margin. - It is usually **painful**, red, and tender, presenting as a small pustule or nodule on the eyelid margin, not a deep-seated painless swelling.

Q: Hordeolum internum is -

Chronic granulomatous inflammation of Meibomian gland. ***Chronic granulomatous inflammation of Meibomian gland*** - A **hordeolum internum**, also known as an **internal chalazion** or simply **chalazion**, is a sterile, chronic **granulomatous inflammation** resulting from the obstruction and subsequent leakage of lipid secretions from a **Meibomian gland**. - It presents as a **painless, firm nodule** located deeper within the eyelid tissue (tarsal plate), differentiating it from an acute infection. - **Note:** While the acute phase may be called an "internal hordeolum," the chronic granulomatous stage is more commonly referred to as a **chalazion**. *Chronic infection of Zeis gland* - A chronic infection of the **gland of Zeis** would typically manifest as a persistent **external hordeolum (stye)** with chronic inflammation. - The **glands of Zeis** are sebaceous glands associated with eyelash follicles, located at the eyelid margin (more superficial than Meibomian glands). - This would present more superficially and is less common than Meibomian gland pathology. *Acute infection of Zeis gland* - An **acute infection** of the **gland of Zeis** is an **external hordeolum (stye)**, which is an acute, painful, localized infection at the eyelash follicle. - This typically presents as a **tender, red, swollen lump** at the eyelid margin, distinct from the painless, deeper lesion of hordeolum internum. *Acute infection of Moll gland* - An **acute infection** of the **gland of Moll** would also be a form of **external hordeolum (stye)**, as these are modified apocrine sweat glands located near the eyelash follicles. - Like Zeis gland infections, it would be characterized by **acute pain, redness, and swelling** at the eyelid margin, rather than the chronic granulomatous inflammation of a Meibomian gland.

Q: In dacrocystorhinostomy (DCR) lacrimal sacs are directly opened into:

Inferior nasal meatus. ***Inferior nasal meatus*** - In **dacrocystorhinostomy (DCR)**, a new connection is created between the **lacrimal sac** and the **nasal cavity** to bypass an obstructed nasolacrimal duct. - The lacrimal sac is opened directly into the **inferior nasal meatus** (or the junction of inferior and middle meatus), maintaining the natural anatomical drainage pathway. - This location corresponds to where the nasolacrimal duct would normally drain, providing effective tear drainage. *Middle nasal meatus* - The middle nasal meatus is located **superior** to the typical DCR anastomosis site. - While the ostium may extend slightly toward the middle meatus in some cases, the primary drainage opening is into the **inferior meatus**. - The middle meatus primarily receives drainage from the maxillary, frontal, and anterior ethmoid sinuses. *Nasolacrimal duct* - The purpose of DCR is to **bypass a blocked nasolacrimal duct**, not to open into it. - The procedure creates a new pathway from the lacrimal sac directly to the nasal cavity, circumventing the obstructed duct. *Superior nasal meatus* - The **superior nasal meatus** is located in the upper nasal cavity and receives drainage from the posterior ethmoid air cells. - It is **not** the anatomical site for DCR surgery, as this would be too superior and would not provide an effective drainage pathway for lacrimal fluid.

Q: Which surgery is indicated for ptosis in Horner's syndrome?

Fasanella-Servat. ***Fasanella - servat*** - This procedure involves resecting the **tarsus**, **Müller's muscle**, and conjunctiva, effectively shortening the posterior lamella of the eyelid. - It is particularly useful for **mild ptosis** with good levator function, often seen in cases secondary to sympathetic denervation like **Horner's syndrome**. *Blaskovics operation* - This is a more complex external approach that involves the resection of the **levator aponeurosis** and Müller's muscle, which is generally reserved for more severe ptosis. - It is typically indicated for patients with **poor levator function** or significant ptosis that cannot be corrected by less invasive methods. *Frontalis sling* - This procedure is used for severe ptosis with **very poor or absent levator function**, often seen in congenital ptosis or oculomotor nerve palsy. - It involves using a sling material to connect the eyelid to the **frontalis muscle**, allowing the eyebrow to lift the eyelid. *Levator resection* - This operation is performed when there is moderate to severe ptosis with **some levator function** present. - It involves shortening the **levator palpebrae superioris muscle** to elevate the eyelid margin.

Q: Best method of treatment for segmental trichiasis

Cryoepilation. ***Cryoepilation*** - Cryoepilation is effective for **segmental trichiasis** because it destroys the **hair follicle** and the associated melanocytes, preventing regrowth. - It utilizes **freezing temperatures** to create a zone of necrosis, leading to permanent destruction of misdirected eyelashes. *Argon laser destruction* - Argon laser destruction is generally **less effective** for trichiasis because it primarily targets pigmented structures and may not reliably destroy the entire **hair follicle**. - It has a higher risk of **collateral damage** to surrounding tissues compared to cryotherapy, especially in non-pigmented lashes. *Electrolysis* - Electrolysis is useful for **solitary** or a few misplaced lashes but is **time-consuming** and less practical for segmental involvement. - The procedure involves inserting a **fine needle** into each follicle to deliver an electric current, which can be tedious and prone to recurrence if the follicle isn't fully destroyed. *Epilation* - Epilation, or **plucking**, offers only **temporary relief** as the lash will regrow in 3-6 weeks. - Repeated epilation can lead to **follicular distortion** and ultimately worsen trichiasis or cause secondary complications like infection.

Q: Valve of Rosenmuller is present in which part of lacrimal system?

Lacrimal sac. ***Lacrimal sac*** - The **valve of Rosenmüller** is located at the junction of the **common canaliculus** and the **lacrimal sac**. - This valve prevents the reflux of tears from the lacrimal sac back into the canaliculi. - It acts as a functional sphincter at the opening of the lacrimal sac. *Canaliculi* - The **canaliculi** are small ducts that drain tears from the puncta to the lacrimal sac. - While they connect to the lacrimal sac, the valve of Rosenmüller is specifically at their junction with the sac, not within the canaliculi themselves. - The **valves of Krause** are found within the canaliculi. *Puncta* - The **puncta** are small openings on the eyelid margin that collect tears from the ocular surface. - They are the entry points into the lacrimal drainage system, upstream from the valve of Rosenmüller. *Nasolacrimal duct* - The **nasolacrimal duct** extends from the lacrimal sac down to the nasal cavity. - The **valve of Hasner** (plica lacrimalis) is located at the distal end of the nasolacrimal duct, not the valve of Rosenmüller.

Question 1

What is the most common malignant tumour of eyelid?

Accepted Answer

Basal cell cancer

Answer

Sebaceous gland carcinoma

Answer

Squamous cell carcinoma

Answer

Melanoma

Question 2

Internal hordeolum is due to inflammation of-

Accepted Answer

Meibomian glands

Answer

Moll's gland

Answer

Lacrimal gland

Answer

Zeis gland

Question 3

Appropriate treatment for mild congenital ptosis?

Accepted Answer

LPS Resection

Answer

Frontalis sling procedure

Answer

Antibiotics and hot compression

Answer

Wedge resection of conjunctiva

Question 4

In dacryocystorhinostomy (DCR), Lacrimal sac opens into:

Accepted Answer

Middle meatus

Answer

Supreme meatus

Answer

Inferior meatus

Answer

Superior meatus

Question 5

Chronic granulomatous inflammation in upper lid (painless swelling) is characteristic of:

Accepted Answer

Chalazion

Answer

Trachoma

Answer

Internal Hordeolum

Answer

External Hordeolum

Question 6

Hordeolum internum is -

Accepted Answer

Chronic granulomatous inflammation of Meibomian gland

Answer

Chronic infection of Zeis gland

Answer

Acute infection of Zeis gland

Answer

Acute infection of Moll gland

Question 7

In dacrocystorhinostomy (DCR) lacrimal sacs are directly opened into:

Accepted Answer

Inferior nasal meatus

Answer

Middle nasal meatus

Answer

Nasolacrimal duct

Answer

Superior nasal meatus

Question 8

Which surgery is indicated for ptosis in Horner's syndrome?

Accepted Answer

Fasanella-Servat

Answer

Blaskovics operation

Answer

Frontalis sling

Answer

Levator resection

Question 9

Best method of treatment for segmental trichiasis

Accepted Answer

Cryoepilation

Answer

Argon laser destruction

Answer

Electrolysis

Answer

Epilation

Question 10

Valve of Rosenmuller is present in which part of lacrimal system?

Accepted Answer

Lacrimal sac

Answer

Canaliculi

Answer

Puncta

Answer

Nasolacrimal duct

Oculoplasty — MCQs

Oculoplasty — MCQs

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