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17 Cards in this Set

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Kickers for Osteoid Ostoma?
Nidus of red trabecular bone surrounded by sclerotic bone
Benign
Men from 10-25
Femur, Tibia, long bones
Diaphysis
Night Pain
Cut it out and cure it
Ewing Sarcoma Kickers?
Malignant
Infiltrative
Extensive Necrosis
Small, Round, Blue Cell Tumor of kids and young adults
European Ancestry
Localized Pain-->soft tissue swelling
Femur, Tibia, Humerus
DDX osteomyelitis, PNET
t(11:22)
OSTEOSARCOMA general kickers?
Codman's Triangle on imaging
Ill-defined, destructive mass
Subtypes (intramedullary, intracortical, surface)
OSTEOSARCOMA who gets it and where?
Involves Metaphysis
Second decade
Distal Femur, Prox Tibia, Prox humerus
Second peak in elderly
Secondary in elderly to Paget's, infarcts, osteomyelitis
Elderly: axial and flat bones
OSTEOSARCOMA
histopath?
lace-like or haphazard pattern of osteoid
OSTEOSARCOMA
course?
Aggressive
Metastasis to lung, liver, bones
OSTEOSARCOMA
markers?
Rb anti-oncogene deletion
SV40
What do Lipomas and Liposarcomas have in common?
Signet rings
What is a Lipoma?
just an unremarkable, encapsulated lesion of lipocytes
Liposarcoma
location, who gets it, how does it arise?
Deep tumor
40-60 yrs
De novo
Key differentiation between lipoma and lipsarcoma?
Lipoma's don't have Lipoblasts and Liposarcomas do!
Liposarcoma ch. abnormality?
12
RHABDOMYOSARCOMA
location
histo
anywhere except bone
myxoid stroma and cross-striations
RHABDOMYOSARCOMA
specific locations based on age?
young kids: head, neck, GU
adolescents: extremities, sinuses, retroperitoneum
RHABDOMYOSARCOMA
prognosis?
bad bad when it spreads, b/c it goes real diffuse
CHONDROSARCOMA
who gets it?
where?
30-50 year olds (not kids)
slightly male dominance
Pelvis, ribs, scapula, femur, humerus
maybe secondary to other diseases
CHONDROSARCOMA
metastasis?
lung and skeleton