Quiz 2 Flashcards
What % of GCT are Malignant?
20%
Signs and symptoms of GCT
Intermittent, achy pain
Localized swelling and tenderness
Restricted joint movement
30% will have pathologic fracture
M/C location for within bones for GCT? M/c spinal location?
Metaphyseal extending to subarticular surface
Distal femur, proximal, tibia, distal radius, proximal humerus
Sacrum
Plain film findings for GCT?
Eccentric, expansile
Thinning cortex
Most are purely lytic, but some will have soap bubble appearance
Can destroy cortex, but no periosteal response or sclerosis
Can you tell from xray if GCT is benign or malignant?
No!
Treatment for GCT?
Complete resection and radiation for spinal lesions
Prognosis is good of benign
Poor of malignant
Which benign neoplasm is defined as a bony exostosis with a cartilaginous cap?
Osteochondroma
What is the m/c benign skeletal tumor?
Osteochondroma
Signs and symptoms of osteochondroma
Usually asymptomatic, unless the mass pushes on vessels or nerves
Sometimes can have path fx
Where do osteochondromas usually develop?
Metaphysis of long bones- femur, humerus, tibia
What are the two types of osteochondroma? which is more at risk for path fx?
Sessile and pedunculated
Pedunculated
Plain film findings for Osteochondroma
Bony exostosis, the cortex is in tact and continuous with the tumor. The trabeculae is also in tact.
At what age can osteochondromas degenerate into malignancy?
> 30
Characteristics that would make one think that the osteochondroma has become malignant?
Pain Growth after skeletal maturity Change in sequential studies Osseous destruction ST mass Dispersal of calcifications in cap
Treatment for osteochondroma?
Usually no treatment needed, but some will be excised (especially those that are subungual)
