Surgery for primary CNS lymphoma? Challenging a paradigm.

Area of Science:

• Neuro-oncology
• Clinical trial analysis
• Cancer treatment outcomes

Background:

• Primary central nervous system lymphoma (PCNSL) is typically treated with chemotherapy and radiotherapy.
• Current standards of care discourage extensive surgical resection for PCNSL, unlike other brain tumors.

Purpose of the Study:

• To evaluate the prognostic impact of the extent of surgical resection on outcomes in patients with PCNSL.
• To challenge the traditional approach of discouraging resection in PCNSL treatment.

Main Methods:

• Secondary analysis of the German PCNSL Study Group-1 trial, a randomized phase III study.
• Involved 526 patients with PCNSL, comparing outcomes based on surgical approach: biopsy versus subtotal or gross total resection.
• Statistical analysis controlled for age, Karnofsky performance status (KPS), and number of lesions.

Main Results:

• Patients undergoing subtotal or gross total resection had significantly longer progression-free survival (HR: 1.39) and overall survival (HR: 1.33) compared to biopsied patients.
• These survival differences persisted even after adjusting for age, KPS, and number of lesions.
• The prognostic impact of resection extent was most pronounced for progression-free survival.

Conclusions:

• The extent of surgical resection appears to have a significant prognostic impact in PCNSL, contrary to established views.
• Reconsideration of the recommendation against resection is warranted, particularly when safe resection of single lesions is feasible.
• Findings suggest that optimizing surgical strategy may improve outcomes for PCNSL patients.