Microvessel quantification in benign and malignant ovarian tumors

Area of Science:

• Gynecology
• Pathology
• Angiogenesis Research

Background:

• Microvessel density (MVD) is a key indicator of angiogenesis.
• Assessing MVD in ovarian tissues is crucial for understanding both physiological processes and pathological conditions like tumors and cysts.

Purpose of the Study:

• To correlate microvessel density (MVD) measurements between fixed (paraffin-embedded) and frozen ovarian tissue sections.
• To investigate the relationship between MVD and the presence of functional ovarian cysts versus tumors.

Main Methods:

• Analyzed 92 paraffin-embedded and 58 corresponding frozen ovarian tissue sections.
• Used anti-human von Willebrand factor antibody as an endothelial marker.
• Quantified MVD in neovascular hotspots using a Quantimet 500+ Image Analyzer at x200 and x400 magnifications, recording highest (HVD) and average (AVD) vessel densities.

Main Results:

• A strong positive correlation was observed between MVD measurements in fixed and frozen sections at both x200 and x400 magnifications (correlation coefficients ranging from 0.30 to 0.38, P < 0.02).
• Both fixed and frozen tissues showed significantly higher HVD and AVD in samples with functional cysts compared to other groups.
• The microcirculation associated with functional cysts appeared more developed than in tumors.

Conclusions:

• The strong correlation between fixed and frozen sections validates MVD assessment in paraffin-embedded tissues for studying ovarian angiogenesis.
• Findings suggest that increased MVD is associated with the development and maturation of functional ovarian cysts.
• Ovarian angiogenesis plays a significant role in both physiological and pathological states of the ovary.