Primary Malignant Melanoma of the Brain: A Population-Based Study

Area of Science:

• Neuro-oncology
• Surgical Oncology
• Epidemiology

Background:

• Primary melanocytic neoplasms of the central nervous system (CNS) are rare, constituting 1% of all melanomas.
• This study investigates the epidemiology and treatment of primary CNS melanoma using a large national database.

Purpose of the Study:

• To evaluate the epidemiology of primary CNS melanoma.
• To characterize treatment strategies and their effectiveness for primary CNS melanoma.

Main Methods:

• Retrospective analysis of the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) database (1973-2015).
• Identification and study of 54 patients with primary CNS melanoma based on inclusion criteria.
• Analysis of demographic, tumor, and treatment data.

Main Results:

• Tumors were primarily located in the cerebral meninges and spinal cord.
• Treatment modalities included biopsy (13%), gross total resection (GTR, 40.7%), subtotal resection (STR, 7.4%), radiation therapy (RT, 46.3%), and chemotherapy (CT, 27.3%).
• GTR alone and STR + RT demonstrated improved disease-specific survival compared to biopsy alone.

Conclusions:

• Gross total resection (GTR) is crucial for treating primary CNS melanoma.
• Adjuvant therapies like RT or RT + CT can be combined with GTR for enhanced survival.
• Subtotal resection (STR) combined with RT offers a survival benefit over biopsy alone when GTR is not achievable.