Sorry for the delay in the answers, so I will give you some memes to say I am sorry.
Great Job Dr. Dey, Bonney, and Lussier!
1. 30-50% (1 Point)
2. Spine, hip, proximal humerus, and distal forearm. (1 pt)
3. Mediated dysfunction of the sympathetic nervous system. (1 pt)
4. Stage I (osteolytic), II (mixed lytic and blastic), III (sclerotic) - (1 pt)
5. Skull, spine, pelvis, and femur (1 pt)
6. Osteosarcoma; 1%; Skull - Giant Cell Tumor (3 Pt)
7. 25 (1 pt)
8. C (1 pt)
9. Because normal red marrow contains a mixture of fat and cellular elements, it will show signal loss on the opposed phase of in and out of phase MRI, but a tumor will not. (1 pt)
10. Sinus tract - soft tissue channel between bone and skin (1 pt)
11. Cloaca - cortical and periosteal defect (1 Pt)
12. Sorry bad question - Osteomyelitis classically has uptake on all 3 phases of a bone scan. (1 pt)
13. Lacy lytic lesions in middle or distal phalanges (1 pt)
14. Knee, elbow, ankle (1 pt)
15. Epiphyseal overgrowth leading to flared metaphyses and enlarged epiphyses (1 pt). Can also lead to early physeal fusion and skeletal shortening.
16. H-shaped vertebra; Osteonecrosis (2 pts)
17. Leukemic lines - lucent transverse metaphyseal bands adjacent the physis (likely due to distrubed endochondral ossification) (1 pt)
20 pts total possible
