Orbit, Eyelids and Lacrimal system 2 Flashcards Preview

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Flashcards in Orbit, Eyelids and Lacrimal system 2 Deck (21):
1

Most common orbital fracture

orbital floor fracture

orbital rim often spared

2

Orbital Floor Fractures
presents with

1. ecchymosis
2. emphysema (air in orbit can increase IOP)
3. subconjunctival hemorrhage
4. enopthalmosis (sinking of eye)

3

Orbital Floor Fractures Tx immediately if

muscle entrapment of oculocaardiact reflex

4

Orbital Floor Fractures
tx early if

1. doplopia
2. hypodlobus
3. large fracture
4. enopthalmos

5

Pediatric Orbital floor fractures high risk of

trap door fractures

6

Pediatric Orbital floor fractures symptoms

1. n/v
2. pain with EOM

7

Pediatric Orbital floor fractures: white eyed blow out

1. do not appear to have significant trauma
2. kids have cancellous, rubbery bone that can entrap inferior rectus m. or other tissue
3. treat with surgery-- implants to prevent re-herniation

8

pediatric orbital tumors

1. Teratoma
2. Capillary hemangioma
3. dermal cysts
4. lymphangioma
5. rhabdomyosarcoma

9

Most common malignant pediatric tumor of orbit

rhabdomyosarcoma

10

Teratoma

1. Congenital tumor of 2 or more germinal layers
2. Proptosis

11

Teratoma treatment

with subtotal exenteration

(removal of all the eye as well as adjoining structures)

12

Most common benign tumor of children

capillary hemangioma

13

Capillary hemangioma treatment

1. Monitor vision
2. Treat strabismus, amblyopia
3. Local or systemic steroids
4. Excision

14

Capillary hemangioma appears

1. Appears at 1-2 wks in age and enlarges for 6-12 months
2. Usually decrease after 1 yr
3. Appear superficially, red and dimpled
4. Appear deep, blue enlarging mass

15

Lymphangioma

1. Within 1st decade of life
2. During infections, lymph or venous structures swell and put pressure on eye
3. In conjunctiva, eyelid, orbit, oropharynx or sinus

16

Lymphangioma treatment

drainings

17

Dermoid cysts are

1. In children, are usually superficial
2. Pinched off skin fills with keratin and can rupture
3. Palpable, painless mass that slowly enlarges
4. Common to lateral brow
5. Can grow through the orbit

18

Dermoid cysts: dermal variety

1. lined with keratinizing epidermis
2. with dermal appendages

19

Dermoid cysts: epidermoid variety

lined by epidermis and filled with keratin

20

Rhabdomyosarcoma

1. Often child with sudden onset and rapidly evolving unilateral proptosis OR early teen with gradually progressive proptosis
2. From undifferentiated pluripotent mesenchymal cells

21

Rhabdomyosarcoma treatment

1. Radiation and chemotherapy
2. Exenteration if recurrent
3. Very good survival if confined within bony orbit