Selective vs Complete Sampling in Hysterectomy Specimens Performed for Atypical Hyperplasia

Area of Science:

• Gynecologic Pathology
• Oncologic Diagnostics
• Surgical Pathology

Background:

• Atypical endometrial hyperplasia is a key risk factor for uterine endometrioid carcinoma (EC).
• Current standards for EC detection involve complete endometrial sampling, which can be resource-intensive.
• Evaluating selective sampling offers a potential balance between resource utilization and diagnostic accuracy.

Purpose of the Study:

• To assess the diagnostic accuracy of selective endometrial sampling for detecting EC.
• To compare the efficacy of selective sampling with traditional complete sampling methods.
• To determine if selective sampling can maintain diagnostic precision while optimizing resource allocation.

Main Methods:

• A double-blinded review compared histologic diagnoses from selective endometrial sampling against original diagnoses from complete sampling.
• Selective sampling involved evaluating only half of the endometrial tissue blocks.
• Diagnostic agreement and detection rates for EC were analyzed.

Main Results:

• Selective sampling detected EC in 92% of hysterectomy specimens, including all high-grade/high-stage carcinomas.
• Initial agreement between selective and complete sampling was 82%, with discrepancies often due to interobserver variability.
• Adjusting for interobserver variability increased diagnostic agreement to 96%.

Conclusions:

• Selective endometrial sampling is a feasible and accurate method for detecting uterine endometrioid carcinoma.
• This approach can significantly save time and resources in pathology laboratories.
• Selective sampling maintains high diagnostic accuracy, comparable to complete sampling when interobserver variability is considered.