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A STUDY ON THE PRE-AND POST-IRRADIATION EFFECT OF BLOOD VESSELS IN THE EXPERIMENTALLY INDUCED TONGUE CANCER

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Abstract

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#ÃÊ·Ï#
The author observed the changes of vasculature of pre-and post-irradiation on DMBA
induced rat to rogue cancer. The study was perform ed by using vascular corrosion
resin casting, and scanning electron microscopy.
The results were as follows.
1. The capillaries runned parallels and formed bundles and, sometimes, plexus. The
endothelial cells were arranged regularly and snail pores were observed.
2. In irradiated normal tongue the capillaries were carved slightly and formed plexus
on initial day of post-irradiation. On third day the capillaries and capillary pores were
dilated and the endothelial cell arrangement was irregular. The effects of irradiation
were gradually increased from initial to the 3rd day, though it was decreased after 7th
day.
3. The vasculature of DMBA induced tongue cancer group were very irregular, and
large avascular lesions were form ed according to the cancer necrosis or tumor cell nest
and the vasculature was narrowed and paralleled around the avascular lesion by
compression of cancer cell nest. The vascular wall was roughened and dilated, forming
club shop ed or varix.
4. The vessels were cuffed and formed reticular network in irradiated DMBA induced
tongue carinoma group. The free end of newly formed capillaries had regular width, and
also irregular club shaped or aneurysmal dilatation were observed. The vascular
structures were destroyed and vessels were fused in tumor necrosis lesion. The
radiation effects were marked on the first and third day of irradiation and the effects
were decreased after seventh day and showed capillary regeneration.

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DMBA; blood vessel; tongue cancer; vasculature; photomicrograph; irradiation.;

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