Occult Primary (Cancer of Unknown Primary [CUP]), Version 1.2015

This clinical practice guideline provides recommendations for evaluation, workup, management, and follow-up of 2 pathologic diagnoses in patients with epithelial occult primary cancer: adenocarcinoma or carcinoma not otherwise specified (NOS), and squamous cell carcinoma (SCC). Diagnostic tests are recommended based on disease location and patient gender. Treatment options for disseminated or localized disease for adenocarcinoma and site-specific SCC are also discussed.