Orbit, Eyelids and Lacrimal system 3 Flashcards Preview

Neuro exam 3 > Orbit, Eyelids and Lacrimal system 3 > Flashcards

Flashcards in Orbit, Eyelids and Lacrimal system 3 Deck (23)
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1
Q
list adult orbital tumors
A
1. dermal cysts
2. cavernous hemangioma
2
Q
most common benign neoplasm in adults
A
cavernous hemangioma
3
Q
cavernous hemangioma
A
1. Slowly progressive proptosis
2. Often in middle aged women
4
Q
cavernous hemangioma located
A
1. Retinal striae
2. hyperopia (farsightedness)
3. optic nerve compression
4. increased IOP
5. strabismus
5
Q
cavernous hemangioma is diagnosed with
A
CT or MRI – well encapsulated mass that is enhancing with vasculature on MRI
6
Q
Neural Tumors affecting the orbit
A
1. Meningiomas (primary orbital)
2. Mengangiomas (sphenoid wing)
3. Schwannoma
4. Neurofibroma
5. Optic nerve glioma
7
Q
Meningiomas (primary orbital)
A
1. Less common
2. Usually along arachnoid of optic sheath
3. Women in 3rd and 4th decades of life
4. Gradual, unilateral loss of vision, painless
8
Q
Meningiomas (primary orbital)
treatment
A
1. Observe if no vision loss or spread
2. Radiation if confined to orbit
3. Surgery if severe vision loss and profound proptosis
9
Q
Mengangiomas (Sphenoid wing)
A
1. Hyperplasia of soft tissue and bone
2. Crawls along lateral wall of orbit
3. Dural tail
10
Q
Mengangiomas (Sphenoid wing) Treatment
A
1. Observe until functional problem
2. Subtotal resection
3. Post-op radiotherapy to reduce recurrence
11
Q
Schwannoma
A
1. Proliferation of Schwann cells encapsulated by perineurium
2. Biphasic pattern or solid areas and myxoid areas
3. Hypercellular
4. Excised easily
12
Q
Lymphoproliferative Disorders
treatment
A
1. Radiotherapy
2. Surgery not curative as these are infiltrative
3. Chemo if aggressive
13
Q
Lymphoproliferative Disorders
A
1. can involve orbit
2. Usually B cell tumor
a. Hodgkin and NH Lymphoma
b. Malignant NH Lymphoma very common lymphoproliferative disease of orbit!
3. T-cell tumors are rare
14
Q
4 most common lymphomas that go to orbit:
A
1. MALT
2. CLL
3. Follicular center lymphoma
4. High grade lymphoma
15
Q
Lacrimal Gland tumors
A
Epithelial tumors or non epithelial tumors
16
Q
Secondary orbital tumors
A
Extended to orbit from adjacent structure
1. Globe or eyelid
2. Sinuses
17
Q
Globe or eyelid secondary orbital tumors
A
1. Choroidal melanoma
2. Retinoblastoma
3. Basal and squamous cell carcinomas
18
Q
metastatic orbital tumor
A
1. breast and lung are most orbital metastasis
2. pain, proptosis, inflammation, bone destruction
19
Q
Congenital nasolacrimal obstruction
A
1. Constant tearing with mucopurulence
2. Dacryocystocele
20
Q
Constant tearing with mucopurulence
A
90% resolves in the first year
21
Q
Dacryocystocele
A
1. Enlargement of nasolacrimal sac at birth
2. Obstruction of canaliculus proximally and nasal valve of Hasner distally
3. Fluid trapped in sac = tears and amniotic fluid
4. Large, bluish, cystic structure
22
Q
Dacryocystocele complications
A
Can get intranasal cyst problem since babies are obligate nose breathers
23
Q
Dacryocystocele is caused by
A
Complications of preseptal cellulitis, orbital cellulitis and intranasal cyst