Juxtacortical Osteosarcoma (Subscribe)  

Juxtacortical or surface tumors are broadly defined as those arising adjacent to the outer surface of cortical bone. These surface lesions may arise from any of the mesenchymal elements present along the bone surface or from the pluripotent cells found within the periosteum. However, in most cases, it is impossible...

Section of Orthopedics Hyperguide

Discussion: - parosteal osteosarcoma is a low-grade malignant bone tumor that usually occurs on the surface of the metaphysis of long bones; - arises between cortex and muscle as a low grade stage...

Radiology case 415-3222 Female patient, 18 years old with discomfort in the left shoulder.
There is a dense lesion in the upper metaphysis of the humerus, which is wrapped around the bone. In part, the view shows a lucent line, 'separating' the lesion from the underlying bone. There is some bone...

Radiology case 471-3222 38 year old male with pain in back and paraplegia.
There is a dense mass in the right lower zone with some crowding of right 9th and 10th ribs. An earlier higher penetration view shows the 10th rib expanded by the tumour. Note how the dense bone of...

Ritts-GD; Pritchard-DJ; Unni-KK; Beabout-JW; Eckardt-JJ Clin-Orthop. 1987 Jun(219): 299-307 Periosteal osteosarcoma is a surface lesion without evidence of medullary involvement.

Section of Orthopedics Hyperguide

This tumour has an onset later than osteosarcoma. 50% of cases are over 30 yrs old. It comprises 4% of all osteosarcomas. The commonest site is in the femur or tibia, although the humerus can be involved. The tumour may be large and may affect between 2 - 10 cms....

high grade periosteal OSA

parOSA

periosteal OSA