Vulvar Low-Grade Squamous Intraepithelial Lesion (LSIL) and Small Condyloma are Overlapping Clinicopathologic...

Area of Science:

• Gynecologic Pathology
• Dermatopathology
• Oncology

Background:

• Vulvar low-grade squamous intraepithelial lesion (LSIL) and condyloma are common HPV-related conditions.
• Distinguishing between these entities is crucial for accurate diagnosis and management.
• Subtle clinicopathologic differences can aid in differentiation.

Purpose of the Study:

• To describe the clinicopathologic features of vulvar LSIL and small condyloma.
• To elaborate diagnostic criteria for differentiating these vulvar lesions.
• To compare the histopathological and clinical characteristics of LSIL and condyloma.

Main Methods:

• Retrospective review of vulvar biopsies diagnosed as LSIL, wart, or condyloma.
• Exclusion of cancers, VIN concerns, large condylomas, and inadequate specimens.
• Histopathological analysis, p16 immunohistochemistry, and clinical data collection.

Main Results:

• 42 women with 59 specimens analyzed; 57% had condyloma, 31% LSIL, 12% both.
• LSIL lesions were more likely flat, white/acetowhite, with smooth surfaces and higher p16 positivity.
• Condyloma lesions showed greater epithelial thickness and irregular rete ridges.

Conclusions:

• Vulvar LSIL and small condyloma share overlapping features but have distinguishing characteristics.
• LSIL is associated with smooth surface contour, normal epithelial thickness, and increased p16 positivity.
• These features aid in differentiating LSIL from condyloma in vulvar biopsies.