This is a collection of 30 musculoskeletal (MSK) radiology cases focusing on nuclear medicine. This book is produced by members of the Intergalactic Online MSK Conference -- hosted online every Friday by musculoskeletal radiologists at the University of Washington and University of California, Davis since 2009. Besides their intrinsic educational value, these cases may be used to earn a maximum of 15.0 AMA PRA Category 1 Credits (tm) through the University of Washington Continuing Medical Education office (uwcme.org). These 15.0 credits are also designated “SA-CME” by the American Board of Radiology (ABR) and qualify toward fulfilling requirements for Maintenance of Certification (MOC) Part II: Lifelong Learning and Self-assessment.