Test 158  (Pathology )

1. Sebaceous cell carcinoma:

a. is associated with excessive sunlight exposure

b. is commoner in the upper than lower lid

c. is associated with radiation

d. is commoner in female than male

e. most often arises from meibomian glands
 

Answera.F   b.T   c.T    d.T   e.T
Sebaceous cell carcinoma is a highly malignant tumours arising mainly from the meibomian glands. It is not associated with sunlight exposure but with radiation. It is commoner in female and most often found in the upper lid. It can present as recurrent chalazion or unilateral blepharitis.

2. The following conditions arise from sweat glands:

a. syringoma

b. clear cell hidradenoma

c. trichoepithelioma

d. trichofolliculoma

e. trichilemmoma
 

Answera.T   b.T  c.F  d.F  e.F
Trichoepithelioma, trichofolliculoma and trichilemmoma arise from hair follicles.
 

3. In diabetic retinopathy, the following changes are seen:

a. accumulation of lipofuscin in retinal pigment epithelium

b. thinning of the capillary basement membrane

c. decreased number of pericytes

d. microaneurysms in areas of ischemia

e. macroaneurysms
 

Answer
a.F   b.F   c.T   d.T  e.F
The capillary basement membrane is thickened 
in diabetic retinopathy. Macroaneurysm is not a feature
 

4. In angioid streaks, breaks occur in:

a. Bruch's membrane

b. retinal pigment epithelium

c. retina

d. choroid

e. sclera

Answer
a.T   b.F c.F  d.F  e.F
 

5. In keratoconus:

a. there is thinning of the peripheral cornea

b. multiple breaks are seen in the Bowman's membrane

c. hydrops results from a break in the Descemet's 
    membrane

d. there is iron deposition within the anterior stroma

e. type II collagen is commonly found in the scar tissue
 

Answer
a.F   b.T  c.T   d.F  e.F
The corneal thinning is typically central. Multiple breaks are seen in the Bowman's membrane. Iron deposition occurs in the epithelium. Type III collagen is found in the scar tissue of keratoconus.

 

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