4.3 Common arthritic conditions 4.3.1 Degenerative joint disease (osteoarthritis) 4.3.2 Rheumatoid arthritis 4.4 Common bone tumors. 4.4.1 Benign bone tumor and tumor-like lesions 4.4.1.1 Simple bone cyst. 4.4.1.2 Aneurysmal bone cyst. 4.4.1.3 Fibrous dysplasia 4.4.1.4 Osteoid osteoma 4.4.1.5 Osteoblastoma 4.4.2 Malignant bone tumor. 4.4.2.1 Osteosarcoma 4.42.2 Chondrosarcoma 4.4.2.3 Fibrosarcoma 4.42.4 Muliple myeloma 4.4.3 Metastatic tumor. 4.4.3.1 Osteolytic metastasis. 4.4.3.2 Osteoblasic metastasis. 4.4.Diagnosic imaging criteria in diagnosis of bnig and malignant bone lesion 4.5 Metabolic bone diseases 4.5.1 Osteoporosis 4.5.2 Osteomalacia 4.5.3 Osteopetrosis 1717 17 4.3 Common arthritic conditions 4.3.1 Degenerative joint disease (osteoarthritis) 4.3.2 Rheumatoid arthritis 4.4 Common bone tumors. 4.4.1 Benign bone tumor and tumor-like lesions. 4.4.1.1 Simple bone cyst. 4.4.1.2 Aneurysmal bone cyst. 4.4.1.3 Fibrous dysplasia. 4.4.1.4 Osteoid osteoma. 4.4.1.5 Osteoblastom a. 4.4.2 Malignant bone tumor. 4.4.2.1 Osteosarcom a. 4.4.2.2 Chondrosarcom a. 4.4.2.3 Fibrosarcoma. 4.4.2.4 Multiple myeloma. 4.4.3 Metastatic tumor. 4.4.3.1 Osteolytic metastasis. 4.4.3.2 Osteoblastic metastasis. 4.4.4 Diagnostic imaging criteria in diagnosis of benign and malignant bone lesion 4.5 Metabolic bone diseases 4.5.1 Osteoporosis 4.5.2 Osteomalacia 4.5.3 Osteopetrosis