Abstract:
Objective: To evaluate the effects of prolonged use of anastrozole as an endocrine treatment of breast cancer on
the corneal epithelium in an animal model.
Study Design: Laboratory based randomized control trial.
Place and Duration of Study: Department of Anatomy, Army Medical College, Rawalpindi in collaboration with
National Institute of Health, Islamabad, six months from Jun 2012 to Nov 2012.
Material and Methods: Twenty adult female NewZealand white rabbits were taken. Ten rabbits were placed in
control group taking normal diet and 10 were given anastrozole orally in the normal dose of 1 mg/day (0.02
mg/kg/day). After the completion of the study, corneas were removed and grossly examined. The specimen
were fixed and slides prepared for histomorphological examination. The epithelium in each slide was examined
for any deposits, edema or increase in stratification and the height of the epithelium was measured for each eye.
The results were compared between the groups for statistical significance.
Results: The epithelium had normal shape with no areas of any deposits, edema or ulceration. The mean
epithelial height in the control group was 21.25 ± 4.29 μm and 21.00 ± 4.28 μm in the right corneas and left
corneas, respectively. The mean epithelial height taken from the experimental group was 20.50 ± 4.97 μm and
21.00 ± 4.28 μm in right sided and left sided corneas, respectively. The p value was calculated to be 0.722 and 1.00
for the right and left corneas, respectively and no statistical significance was found in between the two groups.
Conclusion: Long term administration of anastrozole has no effect on the histological morphology of the corneal
epithelium.
