Ocular Oncology Surgeries — MCQs
A 2-year-old child presents with unilateral leukocoria and poor vision. What is the most likely diagnosis?
Which of the following is the platinum-based chemotherapeutic agent used as first-line treatment for ovarian carcinoma?
Enucleation is done for - a) Retinoblastoma b) Malignant melanoma c) Glaucoma d) Phthisis bulbi
Which of the following is not a relative contraindication for breast conservative surgery?
The primary indication for enucleation in pediatric patients is:
Which tumor is most commonly known to extend from the intracranial space to the orbit?
Most common malignant neoplasm of the eyelid is -
The term enucleation means:
Most common orbital tumor has its origin from?
What is the most common orbital tumor in children?
Ocular Oncology Surgeries Indian Medical PG Practice Questions and MCQs
Question 1: A 2-year-old child presents with unilateral leukocoria and poor vision. What is the most likely diagnosis?
- A. Congenital cataract
- B. Retinoblastoma (Correct Answer)
- C. Endophthalmitis
- D. Coats disease
Explanation: ***Retinoblastoma*** - **Leukocoria** (white pupillary reflex) is the **most common presenting sign** of retinoblastoma, occurring in approximately 60% of cases - The combination of **unilateral leukocoria** and **poor vision** in a **2-year-old child** (peak age 18-24 months) is highly suggestive - It is a **rapidly growing malignant intraocular tumor** arising from the neural retina, requiring urgent evaluation and treatment - Other presenting features may include **strabismus**, **red eye**, and in advanced cases, **proptosis** *Congenital cataract* - Can also present with **leukocoria** due to opacification of the lens - However, congenital cataracts are typically **bilateral** (75% of cases) and diagnosed earlier in infancy - The **static, non-progressive nature** distinguishes it from the rapidly growing retinoblastoma - Family history and associated systemic conditions (TORCH infections, metabolic disorders) are common *Endophthalmitis* - Severe **intraocular infection** affecting vitreous and aqueous humor - Typically presents with **acute pain**, **severe redness**, **hypopyon**, and **rapid vision loss** - Usually follows **penetrating trauma** or **intraocular surgery**, which would be uncommon in a 2-year-old - **Leukocoria without acute inflammatory signs** makes this diagnosis unlikely *Coats disease* - Characterized by **abnormal telangiectatic retinal vessels** with **exudative retinal detachment** and **yellow subretinal exudates** - Can present with leukocoria (yellow reflex due to lipid deposits) in young children - However, it typically affects **older children** (mean age 5-8 years), is predominantly **unilateral**, and has a **more indolent course** - More common in **males** and usually lacks the rapid progression of retinoblastoma
Question 2: Which of the following is the platinum-based chemotherapeutic agent used as first-line treatment for ovarian carcinoma?
- A. Cyclophosphamide
- B. Methotrexate
- C. Cisplatin (Correct Answer)
- D. Dacarbazine
Explanation: ***Cisplatin*** - **Cisplatin** is a platinum-based chemotherapy drug that forms **DNA cross-links**, inhibiting DNA synthesis and leading to the death of rapidly dividing cells, making it highly effective against **ovarian carcinoma**. - It is a cornerstone of chemotherapy regimens for ovarian cancer, often used in combination with other agents such as paclitaxel. *Methotrexate* - **Methotrexate** is an **antimetabolite** that inhibits dihydrofolate reductase, thereby interfering with DNA synthesis. - While it is used in various cancers like leukemia, lymphoma, and some solid tumors (e.g., breast cancer, gestational trophoblastic disease), it is **not a primary recommended drug for ovarian carcinoma**. *Cyclophosphamide* - **Cyclophosphamide** is an **alkylating agent** that causes DNA damage, leading to cell death. - It is used in many cancers, including lymphoma, breast cancer, and some leukemias, but it is **not a first-line or primary agent for ovarian carcinoma** in contemporary treatment guidelines. *Dacarbazine* - **Dacarbazine** is an **alkylating agent** primarily used in the treatment of **malignant melanoma** and Hodgkin lymphoma. - It is **not indicated for the treatment of ovarian carcinoma**.
Question 3: Enucleation is done for - a) Retinoblastoma b) Malignant melanoma c) Glaucoma d) Phthisis bulbi
- A. abd (Correct Answer)
- B. abc
- C. acd
- D. bcd
- E. ab
Explanation: ***abd*** - **Enucleation** (surgical removal of the entire eyeball) is indicated for **retinoblastoma** and **malignant melanoma** due to the malignant nature of these conditions and the risk of metastasis. - It is also performed in cases of severe **phthisis bulbi**, where the eye is shrunken, non-functional, and often painful, to alleviate symptoms and for cosmetic reasons. *abc* - This option incorrectly includes **glaucoma** as a primary indication for enucleation. - While severe, painful, and blind glaucomatous eyes might eventually undergo enucleation, it is not the initial or typical treatment; many other medical and surgical options are explored first. *acd* - This option incorrectly includes **glaucoma** for the aforementioned reasons and omits **malignant melanoma**. - **Malignant melanoma** of the choroid is a significant indication for enucleation, especially in larger tumors, due to its metastatic potential. *bcd* - This option incorrectly includes **glaucoma** and omits **retinoblastoma**. - **Retinoblastoma** is a life-threatening pediatric malignancy, and prompt enucleation is often crucial for treatment and survival.
Question 4: Which of the following is not a relative contraindication for breast conservative surgery?
- A. Multicentric disease
- B. Previous radiation to breast
- C. Large tumor size
- D. Small tumor size (<3cm) (Correct Answer)
Explanation: ***Small tumor size (<3cm)*** ✓ - A small tumor size is **NOT a contraindication** for breast-conserving surgery; it is actually a **favorable condition** and an indication for breast conservation. - Small tumors allow for complete tumor removal with good cosmetic outcomes and adequate margins. - This is the **correct answer** as it is the only option that is NOT a relative contraindication. *Multicentric disease* - **Multicentric disease** refers to the presence of multiple tumor foci in **different quadrants** of the breast, making complete surgical removal challenging with breast-conserving surgery. - This is a **relative contraindication** as it increases the risk of **positive margins** and local recurrence, making mastectomy often a more appropriate option. *Previous radiation to breast* - Prior radiation therapy to the breast is a **contraindication** (often considered absolute) for subsequent breast radiation, which is an essential component of breast-conserving therapy. - Re-irradiation carries a high risk of severe **skin and tissue toxicity**, making further breast conservation unfeasible. *Large tumor size* - A large tumor size is a **relative contraindication** as it can make it difficult to achieve **clear surgical margins** while maintaining an acceptable cosmetic result. - However, **neoadjuvant chemotherapy** may downstage large tumors to make them suitable for breast-conserving surgery. - Without tumor reduction, it often requires **mastectomy**.
Question 5: The primary indication for enucleation in pediatric patients is:
- A. Panophthalmitis
- B. Acute congestive glaucoma
- C. Retinoblastoma (Correct Answer)
- D. None of the options
Explanation: ***Retinoblastoma*** - **Retinoblastoma** is a malignant tumor of the retina commonly seen in children, and **enucleation** (surgical removal of the eye) is frequently the primary treatment to prevent tumor spread and save the child's life. - The decision for enucleation is based on the tumor's size, location, and potential for dissemination, especially when other globe-sparing therapies are not feasible or fail. *Panophthalmitis* - **Panophthalmitis** is a severe infection involving all coats of the eye and orbital tissues, which can be managed with aggressive antibiotic therapy. - While enucleation might be a last resort in cases of uncontrolled infection and severe pain, it is not the primary indication, especially in pediatric patients where globe salvage is often attempted first. *Acute congestive glaucoma* - **Acute congestive glaucoma** involves a sudden, severe increase in intraocular pressure, causing pain and vision loss, but it is primarily managed with medical and surgical interventions to lower pressure. - Enucleation is not a standard treatment for acute glaucoma unless the eye is blind, painful, and unresponsive to all other treatments, and it is rarely the primary indication in children. *None of the options* - This option is incorrect because **retinoblastoma** is a well-established and common primary indication for enucleation in pediatric patients due to its life-threatening nature.
Question 6: Which tumor is most commonly known to extend from the intracranial space to the orbit?
- A. Astrocytoma
- B. Pituitary adenoma
- C. Craniopharyngioma
- D. Sphenoidal wing meningioma (Correct Answer)
Explanation: ***Sphenoidal wing meningioma*** - Sphenoidal wing meningiomas are uniquely positioned to extend from the **intracranial space** into the orbit due to their origin near the sphenoid bone. - Their growth patterns often involve direct invasion or spread through foramina, leading to **orbital involvement** and associated symptoms like proptosis. *Astrocytoma* - While astrocytomas can be aggressive and infiltrate surrounding brain tissue, they are primarily **parenchymal brain tumors** and less commonly extend directly into the orbit from an intracranial origin. - Orbital invasion by astrocytomas usually occurs in the context of **optic pathway gliomas**, which specifically arise from the optic nerve within the orbit or optic chiasm. *Pituitary adenoma* - Pituitary adenomas originate in the **sella turcica** and typically grow superiorly, causing **chiasmal compression** and visual field defects. - Direct extension into the orbit is uncommon unless there is very extensive and aggressive growth, which is not their most common mode of spread. *Craniopharyngioma* - Craniopharyngiomas are typically located in the **suprasellar region**, near the pituitary stalk and third ventricle. - While they can exert mass effect on orbital structures, their primary mode of extension is not direct invasion of the orbit from an **intracranial primary location**.
Question 7: Most common malignant neoplasm of the eyelid is -
- A. Malignant Melanoma
- B. Squamous cell carcinoma
- C. Basal cell Carcinoma (Correct Answer)
- D. Merkel Cell tumour
Explanation: ***Basal cell Carcinoma*** - **Basal cell carcinoma (BCC)** accounts for approximately 90% of all eyelid malignancies, making it the most common type. - It typically appears as a **pearly nodule** with telangiectasias, often in the lower eyelid. *Malignant Melanoma* - While highly malignant, **melanoma** is a relatively rare eyelid tumor, accounting for less than 1% of cases. - It is characterized by its **pigmented** appearance and potential for rapid growth and metastasis. *Squamous cell carcinoma* - **Squamous cell carcinoma (SCC)** is the second most common eyelid malignancy but is far less frequent than BCC, representing about 5-10% of cases. - It often presents as a **red, scaly patch** or nodule with a central ulceration. *Merkel Cell tumour* - **Merkel cell carcinoma** is a very rare and aggressive neuroendocrine tumor of the eyelid. - It presents as a **rapidly growing, painless nodule**, but its incidence is exceedingly low compared to BCC.
Question 8: The term enucleation means:
- A. Removal of eyeball contents
- B. Removal of the eyeball along with surrounding orbital tissue
- C. Removal of the eyeball along with extraocular muscles and part of skull
- D. Removal of eyeball along with a portion of optic nerve (Correct Answer)
Explanation: ***Removal of eyeball along with a portion of optic nerve*** - **Enucleation** specifically refers to the surgical removal of the entire eyeball, typically including a portion of the **optic nerve**. - The extraocular muscles are detached from the globe but remain in the orbit, along with orbital fat and other structures. - This procedure is commonly performed for conditions such as severe trauma, intraocular tumors, or a blind, painful eye. *Removal of eyeball contents* - This describes **evisceration**, a procedure where the contents of the eyeball are removed, leaving the scleral shell and extraocular muscles intact. - Evisceration is often chosen to maintain orbital volume and allow for better prosthetic motility. *Removal of the eyeball along with surrounding orbital tissue* - This would represent a more extensive procedure than enucleation alone. - In enucleation, the globe is removed but the extraocular muscles, orbital fat, and other orbital structures are preserved to maintain orbital volume and support prosthetic fitting. - Removal of orbital tissue beyond the globe itself would describe **orbital exenteration**. *Removal of the eyeball along with extraocular muscles and part of skull* - This extensive procedure is known as **orbital exenteration**, which involves removal of the entire orbital contents, including the eyeball, extraocular muscles, fat, and sometimes bone. - **Exenteration** is reserved for aggressive malignancies that have extended beyond the globe into the orbit.
Question 9: Most common orbital tumor has its origin from?
- A. Blood vessels (Correct Answer)
- B. Nerves
- C. Muscle
- D. Lymph node
Explanation: ***Blood vessels*** - The most common orbital tumor in childhood is a **capillary hemangioma**, which originates from blood vessels. - In adults, the most common primary orbital tumor is an orbital varix, also a **vascular lesion**. *Nerves* - Tumors of neural origin, such as **optic nerve gliomas** or **meningiomas**, are less common than vascular tumors. - While significant, they do not represent the *most* common overall origin for orbital tumors. *Muscle* - Tumors originating from muscle, such as **rhabdomyosarcoma** in children (a malignant tumor), are relatively rare. - **Pseudotumor** (idiopathic orbital inflammation), though common, is an inflammatory condition, not a true neoplasm of muscle origin. *Lymph node* - Tumors of lymphoid origin, such as **lymphomas**, are malignant and can occur in the orbit. - However, they are not the most common primary orbital tumor compared to those of vascular origin.
Question 10: What is the most common orbital tumor in children?
- A. Nerve sheath tumor
- B. Hemangioma (Correct Answer)
- C. Lymphoma
- D. Meningioma
Explanation: ***Hemangioma*** - **Capillary hemangioma** is the **most common benign orbital tumor/mass** in children, typically presenting in the first few months of life. - It is characterized by **rapid growth during the first year**, followed by **spontaneous involution** (usually complete by age 5-7 years). - These lesions are composed of rapidly proliferating endothelial cells and can cause **proptosis, ptosis**, and, if large, **amblyopia** due to visual axis obstruction or induced astigmatism. - Management is often conservative (observation) unless vision-threatening, in which case systemic steroids or propranolol may be used. *Nerve sheath tumor* - **Optic nerve sheath meningiomas** and **schwannomas** are rare in children, typically presenting in older adults. - While they can cause visual impairment and proptosis, their incidence in the pediatric population is significantly lower than hemangiomas. *Lymphoma* - **Orbital lymphoma** is exceedingly rare in children and is typically a tumor of adulthood, often associated with systemic lymphoma. - When it does occur in children, it might be a manifestation of a more widespread lymphoproliferative disorder. *Meningioma* - **Meningiomas** generally arise from arachnoid cap cells and are less common in children than in adults. - In children, they are more often associated with **neurofibromatosis type 2** and tend to be more aggressive.
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