Orbital Diseases Practice Questions

Q: Which of the following tumors presents with proptosis?

Neuroblastoma. **Explanation:** **Neuroblastoma** is the most common extracranial solid tumor of childhood. It frequently metastasizes to the orbit (occurring in approximately 10–20% of cases), typically from a primary site in the adrenal gland or sympathetic chain. The orbital involvement leads to **rapidly progressive proptosis**, often accompanied by characteristic periorbital ecchymosis (known as **"Raccoon eyes"**), which results from the tumor's high vascularity and tendency for spontaneous hemorrhage. **Analysis of Incorrect Options:** * **Nephroblastoma (Wilms Tumor):** While it is a common pediatric renal malignancy, it rarely metastasizes to the orbit. Its primary clinical presentation is an asymptomatic abdominal mass. * **Germ Cell Tumors:** These typically occur in the gonads, mediastinum, or sacrococcygeal region. While they can be malignant, orbital metastasis is extremely rare compared to neuroblastoma. * **Medulloblastoma:** This is a primary CNS tumor of the posterior fossa. It spreads via the cerebrospinal fluid (leptomeningeal spread) rather than hematogenously to the orbit. **Clinical Pearls for NEET-PG:** * **Most common primary orbital malignancy in children:** Rhabdomyosarcoma (presents with sudden, "explosive" proptosis). * **Most common secondary (metastatic) orbital tumor in children:** Neuroblastoma. * **Differential for "Raccoon Eyes":** Neuroblastoma, Basal skull fracture (Le Fort II/III), Amyloidosis, and Kaposi sarcoma. * **Diagnostic Marker:** Elevated urinary catecholamines (VMA/HVA) are often seen in Neuroblastoma.

Q: What is the most common cause of unilateral proptosis?

Thyrotoxicosis. **Explanation:** **Thyroid Eye Disease (TED)**, associated with **Thyrotoxicosis** (Graves' Disease), is the **most common cause of both unilateral and bilateral proptosis** in adults [1]. The underlying mechanism involves an autoimmune-mediated inflammatory infiltration of the extraocular muscles and orbital fat [1]. The accumulation of glycosaminoglycans (GAGs) and subsequent edema leads to increased orbital volume, pushing the globe forward [1]. While TED is systemic, it often presents asymmetrically, making it the leading cause of unilateral displacement [2]. **Analysis of Incorrect Options:** * **Retinoblastoma:** This is the most common primary intraocular malignancy in children [3]. While it can cause proptosis if it extends extraocularly, it is not the most common cause overall. * **Intraocular Hemorrhage:** Bleeding within the eye (e.g., vitreous hemorrhage) typically causes vision loss or increased intraocular pressure, but it does not cause proptosis unless there is an associated retrobulbar (orbital) hemorrhage. * **Raised Intracranial Tension (ICT):** High ICT typically presents with papilledema and cranial nerve palsies (like CN VI palsy). It does not cause proptosis unless there is a specific mass lesion involving the orbital apex or cavernous sinus. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of bilateral proptosis:** Thyroid Eye Disease. * **Most common cause of unilateral proptosis in children:** Orbital Cellulitis. * **Most common primary orbital tumor in adults:** Cavernous Hemangioma. * **Most common primary orbital tumor in children:** Rhabdomyosarcoma [3]. * **Dalrymple Sign:** Upper lid retraction (the most common clinical sign of TED). * **Mnemonic for muscle involvement in TED:** **I M SLOW** (Inferior rectus > Medial rectus > Superior rectus > Lateral rectus > Obliques).

Q: A patient presents with proptosis that increases when bending down. What is the most likely diagnosis?

Orbital Varices. ***Orbital Varices***- This condition involves abnormal orbital veins that swell when orbital venous pressure increases, hence the classic finding of worsening proptosis or **intermittent proptosis** upon bending down or performing the **Valsalva maneuver**.- The proptosis is usually non-pulsatile and often unilateral, resulting from passive congestion of the venous malformation.*Thyroid Eye Disease*- Proptosis in **Thyroid Eye Disease** (**Graves' ophthalmopathy**) is typically caused by chronic inflammation and expansion of **extraocular muscles** and orbital fat, making the proptosis constant.- The severity of proptosis is usually stable and does not fluctuate rapidly or dramatically with maneuvers that increase venous pressure.*Cavernous Sinus Thrombosis*- This condition presents acutely with constant, painful, and progressive proptosis accompanied by **ophthalmoplegia** (due to multiple cranial nerve palsies) and systemic signs like high fever and severe headache.- The clinical picture is typically severe and life-threatening, involving signs of inflammation and infection, not positional congestion.*Orbital Cellulitis*- **Orbital cellulitis** is an acute infectious process characterized by constant, painful, and typically unilateral proptosis, along with severe eyelid swelling (*chemosis*) and **systemic symptoms** (fever).- Proptosis in this condition is fixed and progressive, driven by inflammation and pus formation, and not prone to intermittent worsening simply upon bending down.

Q: Which of the following is true about orbital cellulitis?

Ethmoid sinusitis is the most common etiology. ***Ethmoid sinusitis is the most common etiology*** - Orbital cellulitis most frequently results from the spread of infection from adjacent structures, with the **ethmoid sinus** being the most common source due to the thin **lamina papyracea** separating it from the orbit. - It is almost always a serious complication of **acute bacterial sinusitis**, necessitating urgent aggressive management. *It is present anterior to the orbital septum* - Cellulitis **anterior to the orbital septum** is termed **preseptal** or **periorbital cellulitis**, which is a less severe condition. - Orbital cellulitis is characterized by infection and inflammation extending **posterior to the orbital septum**, affecting the deep orbital soft tissues. *Treated effectively with topical antibiotics* - Topical antibiotics are wholly inadequate for managing such a severe, deep-seated infection with risk of intracranial spread. - Treatment for orbital cellulitis requires immediate initiation of **systemic broad-spectrum intravenous antibiotics**. *Presents with proptosis, orbital swelling, normal pupil, and extraocular movements* - Orbital cellulitis typically causes severe pain, **proptosis**, **chemosis**, and crucially, **restricted and painful extraocular movements** (ophthalmoplegia). - The presence of restricted Extraocular Movements (EOM) and often an **Afferent Pupillary Defect (APD)** differentiates orbital cellulitis from preseptal cellulitis.

Q: A 15-year-old female presents with a painless, gradually increasing mass located at the superotemporal orbital rim (upper outer quadrant of the orbit), present for the past 10 years. On examination, the mass is non-tender and slowly progressive. What is the most likely diagnosis?

Dermoid cyst. ***Dermoid cyst*** - This diagnosis is strongly suggested by the classic presentation of a **painless**, **slowly progressive** mass in a young patient, located near the **superotemporal orbital rim** (lateral to the lateral canthus). - Dermoid cysts are **congenital choristomas** formed by sequestration of ectoderm along embryonic lines of closure, often presenting fixed to the periosteum. *Capillary hemangioma* - These tumors typically present in infancy and exhibit characteristic rapid growth followed by **spontaneous involution** (not slow progression over 10 years). - They are usually soft, compressible, and display color changes (red/blue), unlike the description of a firm, non-tender mass. *Lacrimal gland tumor* - Primary lacrimal gland epithelial tumors are rare in children and primarily occur in **adults** (40-60 years). - They typically cause axial proptosis and globe displacement (inferonasal) due to growth within the **lacrimal fossa**, usually presenting with symptoms related to pressure or pain if malignant. *Epidermoid cyst* - While also slow-growing and painless, epidermoid cysts are less likely than dermoid cysts to be found in the deep subcutaneous tissue fixed to the periosteum near the lateral canthus. - Epidermoid cysts contain only stratified squamous epithelium and keratin, while **dermoid cysts** also contain skin appendages (hair follicles, sebaceous glands).

Q: A 25-year-old lady presents with development of proptosis on Valsalva maneuver. Diagnosis is:

Orbital varix. ***Orbital varix*** - An **orbital varix** is a congenital venous malformation that typically presents with **intermittent proptosis** that worsens with maneuvers that increase venous pressure, such as the **Valsalva maneuver**. - The patient's age and the clear history of proptosis on Valsalva are classic signs of this condition. *Pulsating proptosis* - **Pulsating proptosis** is usually caused by an **arteriovenous malformation** or a **carotid-cavernous fistula**, characterized by a vascular rumble and thrill. - While proptosis can worsen with Valsalva in some vascular lesions, the key differentiating feature here is the *absence of pulsation* in the description. *Optic nerve glioma* - **Optic nerve glioma** typically presents with **slowly progressive proptosis** and **vision loss**, often without significant fluctuation. - It does not characteristically manifest as proptosis dependent on the Valsalva maneuver. *Rhabdomyosarcoma* - **Rhabdomyosarcoma** is a **highly aggressive malignant tumor** of the orbit, most common in children, presenting with **rapidly progressive proptosis**. - It would not typically present with intermittent proptosis linked to the Valsalva maneuver.

Q: A 3-year-old girl brought with swelling in left eye which had shown rapid growth in last 4 weeks. On examination it is a bulbous fleshy mass about 5 x 4 cm arising from lower eyelid. No organomegaly or was noted and lymph node examination was unremarkable. The Complete blood counts are normal. Probable diagnosis is?

Rhabdomyosarcoma. ***Rhabdomyosarcoma*** - This is the most common **primary orbital malignancy in children**, often presenting as a rapidly growing, fleshy periorbital mass, consistent with the 3-year-old girl's symptoms. - The rapid growth (4 weeks) and the description of a **bulbous, fleshy mass** arising from the eyelid are classic presentations of rhabdomyosarcoma. *Retinoblastoma* - This is a malignancy of the retina and typically presents with **leukocoria (white pupillary reflex)**, strabismus, or vision impairment, not usually as an external fleshy mass arising from the eyelid. - While it is a common pediatric eye tumor, its clinical presentation differs significantly from the described external swelling. *Chloroma* - Also known as granulocytic sarcoma, chloroma is an extramedullary manifestation of **acute myeloid leukemia** and would typically be associated with systemic symptoms of leukemia (e.g., anemia, thrombocytopenia, leukocytosis/leukopenia) and abnormal blood counts. - The patient's normal CBC and lack of organomegaly/lymphadenopathy make chloroma less likely. *Orbital metastasis* - While possible, orbital metastases in children are rare and typically arise from **neuroblastoma** or occasionally other primary tumors. - Such metastases usually present with features suggestive of the primary tumor, which are not mentioned here.

Q: What is the most likely complication of the condition shown in the image below?

Exposure Keratitis. ***Exposure Keratitis*** - The image shows **proptosis** (exophthalmos) of the right eye, where the eyeball protrudes forward. This condition often leads to incomplete eyelid closure (lagophthalmos). - **Exposure keratitis** occurs when the cornea is inadequately covered by the eyelids, leading to drying and damage due to constant exposure to air and environmental factors. *Difficulty in eye movement* - While **proptosis** can sometimes be associated with restricted eye movements (e.g., in severe Graves' ophthalmopathy due to muscle swelling), it is not the **most likely direct complication** of the exposure itself. - The image primarily depicts the physical displacement of the globe, which predisposes to corneal issues, not necessarily oculomotor dysfunction as the primary complication. *Cataract* - **Cataracts** are opacities of the lens and are typically associated with aging, trauma, or certain systemic conditions (e.g., diabetes, steroid use). - They are not a direct or common complication of **proptosis** or the resulting **exposure of the ocular surface**. *Glaucoma* - **Glaucoma** is a group of conditions characterized by damage to the optic nerve, often due to elevated intraocular pressure. - While severe **proptosis** leading to orbital congestion can theoretically increase intraocular pressure, it is not the most direct or prevalent complication compared to **exposure keratitis**, which is a direct consequence of inadequate globe protection.

Q: Patient with history of blunt trauma to face presents with enophthalmos, diplopia on upward gaze and loss of sensitivity over cheek. True statement about this is:

It is a blow out fracture. ***It is a blow out fracture*** - The combination of **enophthalmos** (sunken eye), **diplopia on upward gaze** (due to **inferior rectus muscle entrapment**), and **loss of sensitivity over the cheek** (indicating infraorbital nerve involvement) are classic signs of an **orbital blowout fracture**. - These fractures typically involve the **orbital floor** or medial wall, caused by a direct impact to the orbit, which transmits force to the thin bony walls causing them to fracture while the orbital rim remains intact. *Maxillary fracture* - While the **infraorbital nerve** passes through the maxilla, a general maxillary fracture typically presents with broader symptoms such as **midfacial pain**, **swelling**, and **malocclusion**, which are not specified here. - Maxillary fractures often involve the **zygomaticomaxillary complex** or Le Fort patterns, which usually lead to more extensive facial abnormalities. *Zygomatic bone is most likely injured* - A **zygomatic arch fracture** would primarily cause **flattening of the cheek** and pain upon opening the mouth, not enophthalmos or diplopia on upward gaze. - While the zygoma forms part of the orbit, isolated zygomatic fractures rarely cause these specific orbital findings. *Frontal bone fracture* - **Frontal bone fractures** typically result from **high-impact trauma** and can involve the **frontal sinus**, leading to **forehead swelling**, **CSF rhinorrhea**, or **periorbital ecchymosis** (raccoon eyes). - The symptoms described are not characteristic of a frontal bone fracture.

Question 1

Which of the following tumors presents with proptosis?

Accepted Answer

Neuroblastoma

Answer

Nephroblastoma

Answer

Germ cell tumor

Answer

Medulloblastoma

Question 2

What is the most common cause of unilateral proptosis?

Accepted Answer

Thyrotoxicosis

Answer

Retinoblastoma

Answer

Intraocular haemorrhage

Answer

Raised intracranial tension

Question 3

A patient presents with proptosis that increases when bending down. What is the most likely diagnosis?

Accepted Answer

Orbital Varices

Answer

Orbital Cellulitis

Answer

Cavernous Sinus Thrombosis

Answer

Thyroid Eye Disease

Question 4

Which of the following is true about orbital cellulitis?

Accepted Answer

Ethmoid sinusitis is the most common etiology

Answer

Treated effectively with topical antibiotics

Answer

It is present anterior to the orbital septum

Answer

Presents with proptosis, orbital swelling, normal pupil, and extraocular movements

Question 5

A 15-year-old female presents with a painless, gradually increasing mass located at the superotemporal orbital rim (upper outer quadrant of the orbit), present for the past 10 years. On examination, the mass is non-tender and slowly progressive. What is the most likely diagnosis?

Accepted Answer

Dermoid cyst

Answer

Epidermoid cyst

Answer

Capillary hemangioma

Answer

Lacrimal gland tumor

Question 6

A 25-year-old lady presents with development of proptosis on Valsalva maneuver. Diagnosis is:

Accepted Answer

Orbital varix

Answer

Pulsating proptosis

Answer

Optic nerve glioma

Answer

Rhabdomyosarcoma

Question 7

A 3-year-old girl brought with swelling in left eye which had shown rapid growth in last 4 weeks. On examination it is a bulbous fleshy mass about 5 x 4 cm arising from lower eyelid. No organomegaly or was noted and lymph node examination was unremarkable. The Complete blood counts are normal. Probable diagnosis is?

Accepted Answer

Rhabdomyosarcoma

Answer

Retinoblastoma

Answer

Chloroma

Answer

Orbital metastasis

Question 8

Which of the following statements is false?
![img-48.jpeg](img-48.jpeg)

Accepted Answer

The management corresponds to improvement in thyrotoxic state

Answer

Seen in More than 10% of patients with hyperthyroidism

Answer

NOSPECS score is used to classify

Answer

Can lead to visual loss

Question 9

What is the most likely complication of the condition shown in the image below?

Accepted Answer

Exposure Keratitis

Answer

Difficulty in eye movement

Answer

Cataract

Answer

Glaucoma

Question 10

Patient with history of blunt trauma to face presents with enophthalmos, diplopia on upward gaze and loss of sensitivity over cheek. True statement about this is:

Accepted Answer

It is a blow out fracture

Answer

Maxillary fracture

Answer

Zygomatic bone is most likely injured

Answer

Frontal bone fracture

Orbital Diseases — MCQs

Orbital Diseases — MCQs

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