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Investigative Ophthalmology & Visual Science, Vol 31, 2037-2040, Copyright © 1990 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Retinoblastoma. The relationship of proliferating cells to blood vessels

MN Burnier, IW McLean, LE Zimmerman and SH Rosenberg
Department of Ophthalmic Pathology, Armed Forces Institute of Pathology, Washington, DC 20306-6000.

In 150 retinoblastomas the authors found a uniform thickness of the cuff of viable retinoblastoma cells that surrounds blood vessels. The mean thickness was 98.7 microns with a standard deviation of 11.9 microns. The cross-sectional area of the cuff was negatively correlated with the mitotic activity in the cuff and positively correlated with the diameter of the central vessel. The mitotic activity in the cuff of cells was inversely related to the distance from the central blood vessel. When the cuff was divided into three concentric rings, the inner ring contained a mean of 6.2 mitotic figures, the middle ring contained a mean of 2.9 mitotic figures, and the outer ring contained a mean of 0.6 mitotic figures. This pattern of growth is similar to that observed in other rapidly growing neoplasms in humans and experimental animals. In these tumors this pattern results from reduction in oxygen tension with increased distance from the central blood vessel.


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