Musculoskeletal Key

(1) Department of Pathology and Laboratory Medicine, Hospital for Special Surgery, New York, NY, USA   Abstract Myeloma is a malignant tumor of plasma cell lineage; these cells proliferate and…

Sites of Involvement The vast majority involve the metaphysis of the femur, humerus, or tibia. The most common location is the posterior distal femur. Rare sites included the craniofacial bones,…

Sites of Involvement Typically, chondroblastoma occurs in the epiphyses of the long bones. While the occurrence is typically at the end of the major tubular bones, it can also occur…

Fig. 59.1 Brown tumor. Well-demarcated lytic lesion involving the proximal tibia Fig. 59.2 (a) Radiolucent lesion seen in the diaphysis of the tibia. (b) CT scan: the lesion erodes the…

Fig. 58.1 Radiograph of a solitary Langerhans cell histiocytosis (eosinophilic granuloma) in the femoral diaphysis of a young child. Lytic lesion with extensive reactive sclerosis and lamellar periosteal reaction. Radiologic…

Fig. 69.1 (a) Acute osteomyelitis. In the earliest phase, there is no change in the bone (left); the MRI panels demonstrating fluid in the marrow taken at the right demonstrate…

Most cases of CMF occur in the metaphysis of tubular bones of the lower extremity. Approximately one-third of the cases are diagnosed around the knee joint, especially the proximal tibial…

Metaphysis or diaphysis of long bones, especially around the knee. Femur, tibia, and humerus are, in this order, the more frequent locations. Pelvis, especially the ilium, follows in frequency. About…

Fig. 61.1 Bizarre parosteal osteocartilaginous proliferation (BPOP). Radiographic and macroscopic features. (a) Bone and cartilaginous lesion of the metacarpal bone. (b) Well-circumscribed osteocartilaginous nodule Fig. 61.2 Bizarre parosteal osteocartilaginous proliferation….

Slightly greater incidence in males than females. Age The first two decades of life account for 80 % of patients (age at diagnosis ranges from 13 to 19 years), being…