1;Preface;6 2;Contents;7 3;Contributing Authors;11 4;Infection and Arthritis;13 4.1;Case 1.1 Femur Osteomyelitis;14 4.1.1;Comments;15 4.1.2;Imaging Findings;15 4.2;Case 1.2 Rheumatoid Arthritis of the Cervical Spine;16 4.2.1;Comments;16 4.2.2;Imaging Findings;17 4.3;Case 1.3 Ankylosing Spondylitis;18 4.3.1;Comments;18 4.3.2;Imaging Findings;19 4.4;Case 1.4 Enthesitis in Psoriatic Arthritis;20 4.4.1;Comments;21 4.4.2;Imaging Findings;21 4.5;Case 1.5 Calcium Pyrophosphate Crystal Deposition Disease;22 4.5.1;Comments;23 4.5.2;Imaging Findings;23 4.6;Case 1.6 Muscular Abscess;24 4.6.1;Comments;25 4.6.2;Imaging Findings;25 4.7;Case 1.7 Septic Arthritis of the Pubic Symphysis;26 4.7.1;Introduction;27 4.7.2;Imaging Findings;27 4.8;Case 1.8 Facet Joint Arthritis;28 4.8.1;Imaging Findings;29 4.8.2;Imaging Findings;29 4.9;Case 1.9 Cellulitis;30 4.9.1;Comments;31 4.9.2;Imaging Findings;31 4.10;Case 1.10 Pyogenic Spondylodiscitis;32 4.10.1;Comments;33 4.10.2;Imaging Findings;33 5;Tumors;35 5.1;Case 2.1Osteoblastoma of the Rib;36 5.1.1;Comments;37 5.1.2;Imaging Findings;37 5.2;Case 2.2Ewing's Sarcoma;38 5.2.1;Comments;39 5.2.2;Imaging Findings;39 5.3;Case 2.3Intraosseous Lipoma;40 5.3.1;Comments;41 5.3.2;Radiological Findings;41 5.4;Case 2.4Giant Cell Tumor of Bone;42 5.4.1;Comments;43 5.4.2;Radiological Findings;43 5.5;Case 2.5Skeletal Muscle Metastases;44 5.5.1;Comments;45 5.5.2;Radiological Findings;45 5.6;Case 2.6Synovial Sarcoma;46 5.6.1;Comments;47 5.6.2;Radiological Findings;47 5.7;Case 2.7Synovial Hemangioma;48 5.7.1;Comments;49 5.7.2;Radiological Findings;49 5.8;Case 2.8Brown Tumor;50 5.8.1;Comments;51 5.8.2;Radiological Findings;51 5.9;Case 2.9Intramuscular Myxoma;52 5.9.1;Comments;53 5.9.2;Radiological Findings;53 5.10;Case 2.10Soft-Tissue Liposarcoma;54 5.10.1;Comments;55 5.10.2;Imaging Findings;55 6;Tendons and Muscles;57 6.1;Case 3.1Tennis Leg Injury;58 6.1.1;Comments;59 6.2;Case 3.2Hamstring Muscle Injury;60 6.2.1;Comments;60 6.2.2;Imaging Findings;61 6.3;Case 3.3Indirect Rectus Femoris Strain Injury;62 6.3.1;Comments;62 6.3.2;Imaging Findings;63 6.4;Case 3.4Adductor Muscle Strain Injury;64 6.4.1;Comments;65 6.4.2;Imaging Findings;65 6.5;Case 3.5External Hip Rotator Muscle Injury;66 6.5.1;Comments;67 6.5.2;Imaging Findings;67 6.6;Case 3.6Chronic Avulsion of the Ischial Tuberosity;68 6.6.1;Comments;69 6.6.2;Findings;69 6.7;Case 3.7Acute Avulsion of the Anteroinferior Iliac Spine;70 6.7.1;Comments;71 6.7.2;Findings;71 6.8;Case 3.8Patellar Tendinopathy: Partial Tear;72 6.8.1;Comments;73 6.8.2;Findings;73 6.9;Case 3.9Posterior Tibial Tendon Dysfunction;74 6.9.1;Comments;75 6.9.2;Radiological Findings;75 6.10;Case 3.10Partial Rupture of the Aquilles Tendon with Tendinosis;76 6.10.1;Comments;76 6.10.2;Imaging Findings;77 7;Bone Marrow;79 7.1;Case 4.1Bone Metastasis of Melanoma in the Femoral Head Mimicking Avascular Necrosis;80 7.2;Case 4.2 Bone Marrow Necrosis Due to Nonhodgkin's Lymphoma;82 7.3;Case 4.3 Systemic Mastocytosis;84 7.4;Case 4.4 Bone Crisis in Gaucher's Disease;86 7.5;Case 4.5 Non-Hodgkin's (Diffuse Large B-Cell) Lymphoma;88 7.6;Case 4.6 Shoulder Arthropathy Secondary to Gaucher's Disease;90 7.7;Case 4.7 Multifocal Osteonecrosis;92 7.8;Case 4.8 Multiple Myeloma;94 7.9;Case 4.9 Bone Metastases;96 7.10;Case 4.10Regional Migratory Osteoporosis;98 8;Spine;101 8.1;Case 5.1 Congenital Scoliosis;102 8.1.1;Comments;103 8.1.2;Radiological Findings;103 8.2;Case 5.2 Herniated Disc Migration with Spontaneous Regression;104 8.2.1;Comments;105 8.2.2;Radiological Findings;105 8.3;Case 5.3 Ligamentum Flavum Cyst;106 8.3.1;Introduction;106 8.3.2;Imaging Findings;107 8.4;Case 5.4 Primary Vertebral and Epidural Lymphoma;108 8.4.1;Introduction;108 8.4.2;Radiological Findings;109 8.5;Case 5.5 Osteoid Osteoma;110 8.5.1;Introduction;111 8.5.2;Radiological Findings;111 8.6;Case 5.6 Meningioma;112 8.6.1;Introduction;113 8.6.2;Radiological Findings;113 8.7;Case 5.7 Myeloma;114 8.7.1;Comments;114 8.7.2;Radiological Findings;115 8.8;Case 5.8 Fr