PGP 9.5 expression in cutaneous keratoacanthomas and squamous cell carcinomas.

Area of Science:

• Dermatopathology
• Oncology
• Biomarker Research

Background:

• Cutaneous squamous cell carcinoma (SCC) and keratoacanthoma (KA) are common skin malignancies.
• Understanding molecular markers associated with tumor progression is crucial for accurate diagnosis and prognosis.

Purpose of the Study:

• To investigate the expression of Protein Gene Product 9.5 (PGP 9.5) in keratoacanthomas (KAs) and squamous cell carcinomas (SCCs).
• To determine the correlation of PGP 9.5 expression with clinicopathological features and tumor aggressiveness.

Main Methods:

• Immunohistochemical analysis of PGP 9.5 expression in 31 KAs and 36 SCCs.
• Correlation of PGP 9.5 staining intensity with tumor stage, differentiation, size, and perineural/stromal invasion.

Main Results:

• PGP 9.5 expression was significantly correlated with advanced tumor stage (P < 0.001).
• PGP 9.5 expression was also positively associated with potential perineural invasion (P < 0.001).
• No significant correlation was found between PGP 9.5 levels and tumor size or stromal invasion extent.

Conclusions:

• PGP 9.5 expression is closely associated with tumor aggressiveness in KAs and SCCs.
• PGP 9.5 may serve as a valuable biomarker for predicting the outcome in patients treated for these skin cancers.