Morphometry separates squamous cell carcinoma of the vulva into two distinct groups

Area of Science:

• Gynecologic Oncology
• Pathology
• Biomedical Imaging

Background:

• Vulvar squamous cell carcinoma (VSCC) exhibits heterogeneity, impacting pathogenesis and epidemiology.
• Previous studies suggest distinct VSCC groups, but independent validation is needed.

Purpose of the Study:

• To quantitatively investigate the heterogeneity of vulvar squamous cell carcinoma.
• To explore the utility of image analysis in differentiating VSCC subtypes.

Main Methods:

• Analysis of archival VSCC tissue from 36 patients.
• Immunohistochemical staining for p53 and Ki-67 (MIB-1 clone).
• Quantitative image analysis of nuclear parameters, mitotic figures, and DNA-ploidy using the AnalySIS Pro system.

Main Results:

• Cluster analysis identified two distinct VSCC groups.
• Significant differences observed between groups in patient age, nuclear area, p53 expression, and DNA-ploidy.
• No significant differences found in proliferation markers (Ki-67) or clinical stage.

Conclusions:

• Image analysis provides an independent method to confirm VSCC heterogeneity.
• The identified groups suggest distinct biological behaviors and potential differences in pathogenesis.
• This quantitative approach aids in classifying VSCC subtypes.