Angiogenesis and angiogenic factor expression in thyroid cancer.

Area of Science:

• Oncology
• Cancer Biology
• Angiogenesis Research

Background:

• Tumor angiogenesis, characterized by increased vascular density and angiogenic factors, correlates with invasiveness and metastasis.
• Anti-vascular endothelial growth factor (VEGF) therapies have shown promise in potentiating chemotherapy and radiotherapy.
• Identifying subgroups of cancer patients with high angiogenic activity is crucial for targeted therapy selection.

Purpose of the Study:

• To investigate the potential for identifying a subgroup of thyroid cancer patients exhibiting high angiogenic activity.
• To assess vascular density (VD) and the expression of VEGF and basic fibroblast growth factor (bFGF) in thyroid carcinomas.

Main Methods:

• Immunohistochemical analysis of formalin-fixed paraffin-embedded tissues from 25 papillary and 18 follicular thyroid carcinomas.
• Quantification of vascular density (VD).
• Assessment of VEGF and bFGF expression.

Main Results:

• Follicular thyroid tumors exhibited significantly higher vascular density compared to papillary types (p=0.05).
• Tumors larger than 4 cm showed significantly increased vascular density (p=0.001).
• High VEGF expression was significantly associated with high vascular density (p=0.05), while bFGF showed no association with histological characteristics.

Conclusions:

• Increased angiogenic activity is a common feature in thyroid carcinomas, particularly in follicular and larger tumors.
• These findings support the investigation of anti-VEGF therapies combined with chemotherapy and radiotherapy for advanced thyroid cancer.
• The study identifies a potential patient subgroup that may benefit from anti-angiogenic treatments.