Test 184  (Ocular pathology)

1. In sympathetic ophthalmia: 

a. the non-injured eye has granulomatous inflammation of the uvea tissue

b. necrosis is common

c. Dalen-Fuchs nodules are made up of epithelioid cells

d. Dalen-Fuchs nodules are located between the retina and the retinal pigment epithelium

e. the inciting eye must have rupture of the globe
 

Answera.T   b.F  c.T   d.F  e.F
Granulomatous inflammation of the choroid is a features of sympathetic ophthalmia. Necrosis is uncommon. Dalen-Fuchs nodules are made up of epithelia cells situated between the Bruch's membrane and the retinal pigment epithelium. Sympathetic ophthalmia has been reported following cataract surgery.

2. The following HLAs are associated with an increased incidence of  
     uveitis:

a. HLA-B27

b. HLA-A29

c. HLA-B51

d. HLA-A1

e. HLA-DW5
 

Answera.T  b.T  c.T  d.F  e.T
HLA-B27 has an increased frequency in patients with ankylosing spondylitis and Reiter's syndrome. HLA-A29 shows an increased incidence in birdshot choriodopathy. HLA-B51 is associated with Behcet's disease and HLA-DW5 in juvenile rheumatoid arthritis is associated with an increased incidence of uveitis.

 
 

3. Amyloid is found in the following conditions:

a. lattice degeneration of the retina

b. lattice dystrophy

c. granular dystrophy

d. Reis-Buckler's dystrophy

e. Avellino dystrophy
 

Answer
a.F   b.T  c.F  d.F  e.T
Amyloid is found in lattice and Avellino dystrophies.

 

. 4. The following are hamartomas:

a. ectopic lacrimal gland

b. Lisch's nodules

c. cavernous haemangioma

d. lymphangioma

e. meningioma 
 

Answer
a.F  b.T  c.T  d.T  e.F
Hamartomas are congenital and are made up of are proliferations of disorganized tissues normally encountered in that location. Ectopic lacrimal gland is regarded as choristoma ie. foci of normal tissues located in abnormal sites

5. Elschnig's pearls:

a. cause phacoanaphylactic uveitis

b. are seen mainly after cataract extraction

c. are usually opaque

d. are made up of nucleated lens fibres.

e. are the most common cause of decreased following 
    cataract surgery
 

Answer
a.F   b.T  c.F  d.T  e.F
Elschnig's pearls are translucent and made up of nucleated lens fibres which are left behind after cataract surgery. Posterior capsule opacification is the most common cause of decreased vision following cataract surgery.

 

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