Tumors Of Orbit

Question 1

Mx malignant tumor of eyelid is …..

Mx benign tumor of eyelid is …..

Answer 1

Basal cell carcinoma

Squamous papilloma

Question 2

Mc benign orbital tumor
Adults
Children

Answer 2

Adult: dermoid cyst > cavernous hemangioma
Children: dermoid cyst

Question 3

Mc malignant orbital tumor
Adults
Children.

Answer 3

Adults: lymphoma
Children: rhabdomyosarcoma

Question 4

Primary intraocular tumor
Adults
Children

Answer 4

Adults : uveal melanoma- in choroid
Children: retinoblastoma

Question 5

Mc malignant eyelid tumor
Most common malignant tumor of eye

Answer 5

BCC

Malignant melanoma > retinoblastoma

Question 6

Mc epithelial tumor of lacrimal gland
Overall most common tumor of lacrimal gland:

Most common metastatic tumor of lacrimal gland:

Answer 6

Pleomorphic adenoma

Lymphoma
I.f pseudotumor

NHL

Question 7

Mc malignant tumor of cornea and conjunctiva

Define lagoothalmos

Answer 7

Squamous cell carcinoma

Inadequate closure of eyelid

Question 8

Causes of lagopthalmos (6)

Answer 8

1. Nocturnal lagopthalmos
2. CN 7 palsy: bell’s palsy, sarcoid, leprosy
3. CSOM
4. Posterior mastoidectomy
5. Thyroid exopthalmos
6. Cicatricial deformity of upper eyelid

Question 9

Complications : (2)

Answer 9

Exposure keratitis
Neuroparalytic keratitis

Question 10

Basal cell carcinoma is also known as ……
Seen in ….people age:

Answer 10

Rodent ulcer
Caucasian
Age : 40-70 yrs

Question 11

Involvement and cause of BCC of eyelid

Answer 11

Cause: uv rays
Locally malignant

Involvement : lower eyelid > medial canthus

Question 12

Another name for basal nevus syndrome
Seen in ….

Answer 12

Gorlin-goltz syndrome
Rare- those with BCC

Question 13

Sx for basal cell carcinoma (2)

Answer 13

Moh’s micrographic surgery
Excision of frozen section control

Question 14

C/f of BCC, spread of BCC
Rx

Answer 14

Nodular, central ulcer, pearly sign, telangiectasia

Spread: local

Rx: resection, radiation

Question 15

Common location of squamous cell cancer . Spread

Answer 15

Lower lid-h/o actinic keratosis
Spread : local

Question 16

C/f of squamous cell cancer
Therapy

Answer 16

Ulcerative, thick margin, keratosis
Resection
Radiation
Cryorx

Question 17

Common location of sebaccous cell cancer
C/f
Spread

Answer 17

Upper lid
Nodular similar to chalazion
F>M
Spread: local LN

Question 18

Rx for sebaccous cell cancer

Answer 18

Resection, cryorx, exenteration

Question 19

Malignant melanoma seen mainly in….area
Spread
C/f

Answer 19

Previous nevi
Local, vascular LN

> 6mm pigmented lesion,i.f, vascularization

Question 20

Rx of malignant melanoma

Answer 20

Resection
Exenteration.

Question 21

Mc metastatic tumor of orbit in children

Answer 21

Neuroblastoma

Question 22

Mc cause of proptosis in children. U/l , B/l

Answer 22

U/L: orbital cellulitis
B/L: neuroblastoma

Question 23

Cause of proptosis in adults

Answer 23

Graves opthalmopathy (both unilateral and bilateral proptosis)

Question 24

Iris coloboma mx area is in ….
Eyelid coloboma mc seen in….

Answer 24

Inferonasal

Superotemporal

Question 25

Ocular manifestation of HIV positive patient Ocular manifestation when CD< 50.

Answer 25

Cotton wool spots Pizza pie appearance - CMV retinitis

Question 26

How does proptosis present in orbital varices ? Instrument used to determine amount of proptosis

Answer 26

When doing valsalva /bending down Hertel’s exopthalmometer

Question 27

Signs of thyroid opthalmopathy (4)

Answer 27

1. Mobius sign: medial rectus-> decrease convergence of eyelid 2. Von Grafe: when looking down, upper eyelid not go down - lid lag on downward gaze. 3. Dalrympe sign: frightening look 4. Still wag sign: eyes still, not blinking

Question 28

Radiological sign in thyroid opthalmopathy Mc muscle involved in thyroid opthalmopathy

Answer 28

Coke bottle sign : tendon is normal , belly of muscle involved Inferior rectus > medial>superior >lateral (IMS L ucknow)

Question 29

Most common cause of leukocoria(pink) in 5 yr male: Mc cause of leucoria in preterm children

Answer 29

Coat’s disease ROP