Jeffrey S. Klein, MD, Editor of RadioGraphics, discusses six articles from the January-February 2019 issue of RadioGraphics. ARTICLES DISCUSSED: Complications of Intravesical BCG Immunotherapy for Bladder Cancer., RadioGraphics 2019; 39:80-94; Imaging of Histiocytosis in the Era of Genomic Medicine., RadioGraphics 2019; 39:95-114; Transcatheter aortic Valve Replacement: Alternative Access Beyond the Femoral Arterial Approach., RadioGraphics 2019; 39:30-43; Encapsulating Peritoneal Sclerosis: The Abdominal Cocoon., RadioGraphics 2019; 39:62-77; Pediatric Central Nervous System Imaging of Nonaccidental Trauma: Beyond Subdural Hematomas., RadioGraphics 2019; 39: 213–228; Revisiting Prostate Cancer Recurrence with PSMA PET: Atlas of Typical and Atypical Patterns of Spread., RadioGraphics 2019; 39:186-212.