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Boards Part 4 xray
| Question | Answer |
|---|---|
| Pars fracture in lumbar spine. What part of "scotty dog" is fractured? | Neck |
| Shenton's line indicative of? | femoral neck fracture, hip dislocation, slipped femoral capital epiphysis |
| Associated with Down's syndrome | increased ADI space, absent transverse ligament |
| RA | fusion of apophyseal joints, deformed spinous processes, decreased anterior to posterior diameter of the vertebral body |
| Klippel-feil | low hairline, decreased range of cervical motion and short, webbed neck |
| ossiculum terminale persistens of Bergman | failure of fusion of the apical secondary ossification center at the odontoid tip. visible as a "V" shape in pt over 12. |
| os odontoideum | top of odontoid develops notmally but fails to unite. visualized as a well defined, smooth, radiolucency |
| enchondromatosis | Enchondromatosis is a form of osteochondrodysplasia characterized by a proliferation of enchondromas. An Enchondroma is a cartilage cyst found in the bone marrow. Typically, enchondroma is discovered on a X-ray scan |
| osteosarcoma | malignant bone lesion, cumulus cloud in appearance and effects predominately males btw 10-25 |
| bone island | thorn-like radiating spicules |
| differentials for bone island | osteoma and osteoblastic metastasis |
| enostoma, likely dx | bone island |
| 2 common locations for an enostoma to occur | ilium and proximal femur |
| bone islands are not likely in the... | skull |
| osteoid osteoma | Radiographs in osteoid osteoma typically show a round lucency, the nidus, surrounded by sclerotic bone. |
| most common places for osteoid osteomas | femur and tibia |
| most common stucture in the spine for osteoid osteoma to occur | lamina |
| differential of osteoid osteoma | Brodie's abscess |
| Brodie's abscess | subacute osteomyelitis, which may persist for years before converting to a frank osteomyelitis |