title: The rule of fives, a simple way to stratify risk for primary gastrointestinal stromal tumors (GIST).
abstract: The current AJCC version 7 staging system is a lugubrious means to classify gastrointestinal stromal tumors with respect to their risk and need for adjuvant systemic therapy. The rule of fives, suggested here, is a means to quickly assess whether a given gastrointestinal stromal tumor is low vs intermediate-high risk.
authors.affiliation: Departments of Medicine, Pediatrics, and Orthopaedics, Mount Sinai School of Medicine, New York, NY, 10029-6574, USA. bobmakimd@gmail.com.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Maki