| Type |
Description |
Location |
Incidence |
Special things to remember |
| Endochondroma |
Cartilaginous neoplasm in intermedullary bone |
Distal extremities (hands and feet) |
no special age |
|
| Osteoblastoma |
Similar to osteoid osteoma (interlacing traveculae of woven bone surrounded by OB but larger |
vertebral column |
None |
|
| Osteoid osteoma |
Interlacing traveulae of woven bone surrounded by osteoblasts (proliferation of osteoid and fibrous tissue) |
Near end of diaphysis of the femur or tibia |
Males under <25 |
|
| Osteoma |
Dense bone maturation (new piece of bone grows on another piece |
Skull/facial bones; often protrudes into paranasal sinus |
Males of any age |
|
| Osteosarcoma (name predisposing factors) |
osteoid and bone-producing neoplasm; Codman's triangle, sunburst pattern, increase ALP |
Distal femur, metaphysis of long bones, proximal tibial region (knee) |
Males 10-20 |
Predisposing factors: Paget's, bone infarcts, radiation, familial retinoblastoma; early hematogenous spread to liver, lungs, brain |
| Ewing's sarcoma |
Anaplastic "small blue cell" tumor. Onion skin appearance in bone. |
Diaphysis oflong bones, pelvis, scapula, ribs |
Males < 15 |
translocation 11;22;responsive to chemo but aggressive with early mets; in early stages may look like acute osteomyelitis |
| Chondrosarcoma |
cartilaginous tumor. Expansile glistening mass within the medullary cavity |
pelvis, spine, scapula, humerus, tibia, femur |
Males 30-60 |
May have come from an osteochondroma |
| Osteochondroma (aka ___) |
Exostosis. Cartilage-capped projection from under periosteum |
Long metaphysis: distal femer, proximal tibia (knee) |
Male <25 years old |
Most common benign tumor; rarerly turns into a chondrosarcoma |
| Giant cell tumor (aka _____) |
osteoclastoma. locally aggressive tumor with spindle-shaped cells with multi-nucleated gian cells; soap bubbles, double bubble appearance on X-ray |
Epiphyses of long bones (knee is common) |
Females 20-40 |
|
Poultry
