Orbital Tumors

Symptoms

• proptosis (prominent eye) or globe displacement
• diplopia (double vision) and restricted motility
• decreased vision or "washed out" color (compressive neuropathy)
• pain: highly suggestive of malignancy or acute inflammation
• rapidly progressive proptosis: emergent red flag in children (rhabdomyosarcoma)

Clinical Findings

Pediatric presentations

• capillary hemangioma: most common benign pediatric tumor; "strawberry" skin lesion; involutes by age 5–7
• rhabdomyosarcoma: most common primary pediatric malignancy; explosive growth; superonasal location
• dermoid cyst: most common benign pediatric mass; superotemporal, well-circumscribed

Adult presentations

• cavernous venous malformation: most common benign adult tumor; middle-aged women, slow painless proptosis
• orbital lymphoma: most common primary adult malignancy; "salmon patch" subconjunctival appearance
• optic nerve sheath meningioma: "tram-track" calcification on ct; optociliary shunt vessels

Metastatic disease

• breast (women) and lung (men) are most common; prostate favors bone (sphenoid)
• scirrhous breast carcinoma: can cause enophthalmos (sunken eye) due to fibrosis

Etiology

Intraconal

• cavernous venous malformation, optic nerve glioma, meningioma, schwannoma

Extraconal

• mucocele (sinus origin), dermoid cyst, lacrimal gland tumors (pleomorphic adenoma)

Systemic/vascular

• lymphoma (malt/emzl), leukemic chloroma, orbital varices, avm

Red Flags

• rapid progression in a child: assume rhabdomyosarcoma; biopsy within 24–48 hours
• vision loss + rapd: indicates compressive optic neuropathy requiring urgent debulking
• bony destruction: characteristic of aggressive malignancies (e.g., adenoid cystic ca)
• bilateral lacrimal enlargement: consider igg4-related disease, sarcoidosis, or lymphoma

Investigations

Imaging (essential)

• ct orbits (axial/coronal): best for bone detail and calcification (meningioma)
• mri orbits with gadolinium & fat suppression: gold standard for soft tissue and nerve

Clinical workup

• hertel exophthalmometry: to objectively measure proptosis
• vision testing: va, pupils (rapd), color plates, and visual fields

Biopsy & staging

• incisional biopsy: required for most suspicious masses; fresh tissue needed for lymphoma (flow cytometry)
• systemic staging: pet-ct or ct chest/abd/pelvis for lymphoma and metastases

Treatment

Benign lesions

• cavernous malformation: observe if asymptomatic; excise if progressive
• capillary hemangioma: oral propranolol is first-line if vision is threatened
• dermoid: surgical excision with intact capsule (avoids inflammatory rupture)

Malignant lesions

• rhabdomyosarcoma: chemoradiation (excellent prognosis >90% if localized)
• lymphoma: external beam radiation for localized; rituximab/chemo for systemic
• ons-meningioma: stereotactic radiotherapy for progressive vision loss

Other

• mucocele: endoscopic sinus drainage and antibiotics

Clinical Pearl

a painless proptosis in an adult without inflammation is a tumor until imaged — vascular lesions (cavernous hemangioma) and lacrimal gland masses top the list; ct and mri together determine surgical approach.

Differential Diagnosis

• • thyroid eye disease (most common cause of adult proptosis; usually bilateral)
• • orbital cellulitis (fever, pain, sinus opacification)
• • idiopathic orbital inflammation (pseudotumor)
• • carotid-cavernous fistula (bruit, pulsatile proptosis, corkscrew vessels)

Related Oncology Conditions

• Conjunctival Tumors
• Malignant Melanoma of the Iris