This issue of PET Clinics is Part II of a two-part issue, and focuses on PET-CT-MRI Applications of Musculoskeletal Disorders. It is edited by Drs. Abass Alavi (the Consulting Editor of PET Clinics), Ali Salavati, Ali Gholamrezanezhad and Ali Guermazi. Articles will include:Applications of PET-CT-MR in the management of benign musculoskeletal disorders; Diagnostic management of primary and secondary spinal neoplastic disease: The role of PET-CT-MRI; Skeletal Metastasis Evaluation: Value and impact of PET/CT on Diagnosis, Management and Prognosis; Hybrid imaging (PET CT/PET MRI) of bone metastases; Diffusion-weighted MR Imaging in Evaluating Bone Metastases; Imaging of Osteoarthritis by Conventional Radiography, MRI, PET-CT and PET-MRI; Evolving Role of MRI and PET in Assessing Osteoporosis; Evolving Role of Novel PET-CT-MRI based quantitative technique for Assessing Muscle Disorders; Pediatric musculoskeletal applications of PET-CT-MRI; In vivo molecular imaging of inflammation and infection; Future perspective of the application of PET-CT-MRI in musculoskeletal disorders; and more!