Nucs

Question 1

cold on bone scan

Answer 1

myeloma
mets from small round blue cell tumours 
- melanoma
- RCC
- thyroid cancer 
- small cell lung cancer
- neuroblastoma
lymphoproliferative: lymphoma, leukaemia

Question 2

MDP uptake in liver

Answer 2

diffuse
- cirrhosis
- infarction (with necrosis)
- amyloid
- aluminum breakthrough (technical cause)
- recent Tc-Sulfur Colloid or WBC scan
- multifocal/diffuse HCC (from dystrophic calcification)
focal
- HCC
- mets that calcify (e.g. from mucinous primary)
- infarction (with necrosis)

Question 3

abnormal growth plates

Answer 3

unilateral/solitary:
- trauma
- infection
bilateral/multifocal:
- neoplasm:
    - neuroblastoma
    - lymphoproliferative