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Quantifying Pulmonary Microvascular Density in Mice Across Lobules
Published on: January 3, 2025
Variation in vascular distribution in small lung cancers
Lijuan Zhang1, David F Yankelevitz, Claudia I Henschke
1Department of Radiology, Weill Medical College of Cornell University, New York, NY, United States.
Lung Cancer (Amsterdam, Netherlands)
|September 1, 2009
Summary
Small lung cancers show remodeling of blood vessels as they grow. Adenocarcinomas have more vessels than other types, with vessel count decreasing as tumor cell differentiation lessens.
Area of Science:
- Pulmonary pathology
- Oncology
- Vascular biology
Background:
- Small lung cancers require detailed characterization for effective treatment strategies.
- Understanding the vascular component of lung tumors is crucial for assessing tumor growth and potential therapeutic targets.
Purpose of the Study:
- To quantitatively assess the vascular component in small lung cancers.
- To investigate the relationship between tumor cell type, differentiation, and vascularity.
Main Methods:
- Analysis of 105 resected non-small-cell lung carcinomas.
- Digital scanning of histology slides to quantify blood vessel number (per tumor area) and total vascular area.
- Correlation of vascular metrics with tumor cell type (adenocarcinoma, large-cell, squamous-cell), percentage of lepidic component (BAC), and CT consistency (non-solid, part-solid, solid).
Main Results:
- Adenocarcinomas exhibited a significantly higher number of blood vessels per tumor area compared to large-cell and squamous-cell carcinomas.
- In adenocarcinomas, the number of vessels per tumor area decreased with a lower percentage of BAC (better differentiation).
- Nodule consistency (solid, part-solid, non-solid) correlated with vessel number, but not with the overall vascular area ratio.
Conclusions:
- Tumor vasculature undergoes remodeling during tumor growth, with larger tumors potentially having fewer, larger vessels.
- Squamous-cell and large-cell carcinomas tend to have larger average vessel diameters than adenocarcinomas.
- The vascular area of small lung cancers (≥200µm diameter) is a small proportion of total tumor volume and may not significantly impact tumor growth estimates.
