Vascular density has prognostic value in Merkel cell carcinoma
Lydia Ng1, Trevor William Beer, Kevin Murray
1Cutaneous Pathology, 26 Leura Ave, Nedlands, Western Australia, Australia.
The American Journal of Dermatopathology
|September 23, 2008
Summary
Higher vascular density in Merkel cell carcinoma indicates a worse prognosis. Increased vessel scores significantly correlate with a higher risk of death, aiding in predicting tumor behavior.
Area of Science:
- Oncology
- Pathology
Background:
- Merkel cell carcinoma (MCC) is an aggressive skin cancer.
- Establishing reliable histological prognostic factors for MCC is crucial for patient management.
Purpose of the Study:
- To investigate the prognostic significance of vascular density in Merkel cell carcinoma.
- To determine if CD34-based vascular density correlates with patient outcomes.
Main Methods:
- Immunohistochemical staining for CD34 (endothelial marker) on 36 MCC tissue samples.
- Assessment of vascular density using a Chalkley eyepiece graticule in tumor and stroma.
- Correlation of vascular density scores with clinical and histological parameters.
Main Results:
- Increased vascular density was significantly associated with a worse prognosis (P = 0.005).
- A 1-unit increase in vessel score correlated with a 3.9-fold increase in the risk of death.
- Tumor size, lymphovascular invasion, and mast cell count also predicted poorer outcomes.
Conclusions:
- Elevated vascular density is a significant adverse prognostic factor in Merkel cell carcinoma.
- Vascular density assessment may aid in predicting MCC clinical behavior and evaluating therapies.
