How can you tell the difference between a giant cell tumor and an aneurysmal bone cyst?

Septation was seen in both tumors. Typical of ABC was a sharp and trabeculated margin, whereas GCT had an ill-defined edge with normal cancellous bone (P = 0.007). The growth of ABCs often expanded the cortex, while GCTs eroded, thinned, and broke the cortical bone (P = 0.001).

Is aneurysmal bone cyst cancerous?

They are benign cysts (non-cancerous) that don’t spread. ABCs are most common during a child’s teenage years. They can occur in virtually any bone in the arms, legs, trunk or skull as well as the vertebrae and knee. While it’s benign, it can be quite destructive, because it deforms the bone and can cause fractures.

What is soap bubble appearance?

Soap bubble appearance describes: A multi-loculated bubbly appearance. In bone refers to : an expansile lytic lesion with internal trabeculations and preserved cortex, usually of benign nature. May be used to describe more aggressive lesions.

Are there any cases of soft tissue aneurysmal cysts?

Objective: Aneurysmal bone cysts (ABC) rarely present in soft tissue locations (STABC). The 30 cases of STABC reported in the English literature were reviewed. Six new cases retrieved from the files of the Netherlands Committee on Bone Tumors were compared to the six cases described in the radiological literature.

How is MRI used to diagnose aneurysmal bone cyst?

MRI is able to demonstrate the characteristic fluid-fluid levels exquisitely as well as identify the presence of a solid component suggesting that the aneurysmal bone cyst is secondary.

What is the doughnut sign of an aneurysmal cyst?

Doughnut sign: increased uptake peripherally with a photopenic center. MRI is able to demonstrate the characteristic fluid-fluid levels exquisitely as well as identify the presence of a solid component suggesting that the aneurysmal bone cyst is secondary. The cysts are of a variable signal, with a surrounding rim of low T1 and T2 signal.

What kind of cells are in aneurysmal bone cysts?

Aneurysmal bone cysts consist of blood-filled spaces of variable size that are separated by connective tissue containing trabeculae of bone or osteoid tissue and osteoclast giant cells.