Classification systems in Gestational trophoblastic neoplasia - Sentiment or evidenced based?

Area of Science:

• Gynecology
• Oncology
• Pathology

Background:

• Gestational trophoblastic neoplasia (GTN) classification has been debated for over a century.
• Multiple histological, anatomical, and clinical prognostic systems have coexisted globally.
• A lack of high-quality data previously hindered worldwide consensus on optimal classification.

Purpose of the Study:

• To review the historical development of GTN classification systems.
• To critically evaluate the evidence underpinning existing classification methods.
• To appraise the current FIGO/WHO prognostic system and its clinical utility.

Main Methods:

• Historical review of GTN classification systems.
• Critical appraisal of evidence supporting different classification approaches.
• Analysis of criticisms regarding the current FIGO/WHO system.

Main Results:

• No single validated, prospectively tested GTN classification system has been established.
• The current FIGO/WHO system faces challenges in predicting chemotherapy resistance and relapse.
• A significant proportion of low-risk GTN patients exhibit resistance to first-line therapy.

Conclusions:

• The historical evolution of GTN classification highlights persistent challenges.
• The current FIGO/WHO system requires further scrutiny regarding its predictive accuracy.
• There is a need to reconcile clinical preferences with evidence-based practices in GTN management.