Flashcards in msk tumors contd.. Deck (53):
what is the other name for NOF?
common age of presentation of NOF?
children and and adolescents
Fibrous cortical defect VS non ossifying fibroma?
>2cm - NOF
radiographic findings in NOF?
no matrix ca++
cortical disruption/ thinning
what is the most common soft tissue sarcoma in adults??
common location of MFH?
thigh and retroperitoneum
path in fibrous dyplasia?
replacemtn of normal cancellous tissue with fibrous tissue
types of FD?
mono-ostotic and polyostotic
complication of FD
fracture at femoral neck
appearance of FD?
bowing deformity (shpherds crook)
how to differentiate FD in base of skull from paget's
pagets occurs in adults
how does FD appear in pelvis?
how does FD appear in rib/ long bones
Mc cune albright syndrome
cafe au lait spots
fd and intramuscular myxomas in the same region of the body
GCT location and age
imaging features in GCT
lytic epiphyseal eccentrically placed at the articular end of long bones
where does GCT arise from
metaphysis, and spreads to epiphysis
multifocal GCT - where is it seen?
pagets or hyperparathyroidism
Eosiniphilic granuloma path?
appearance in skull
lytic lesion with beveled edge
when EG occurs in mandible or maxillar, erodes the alveolar process and causes this
appearance of LCH in long bones?
destructive lytic lesion with lamellated perisoteal reaction
what are the 2 most common pediatric primary bone tumor
radiographic appearance of ewings?
permeative bone destruction
aggressive periosteal reaction
soft tissue mass
DD for aggressive lytic lesion
common imaging feature of MM?
multiple lytic lesion with endosteal scalloping.
relative sparing of pedicle in vertebra
what is bone scan finding in MM?
normal unlike mets
dd for MM
single MM is called
plasmacytoma in vertebra appearance?
1.) aggressive lytic lesion
2.) ivory verterbral body
soft tissue mass
finding in intraosseous liipoma?
central ring like calcification
what are the common sites for intraosseous lipoma?
distal tibia/ fibula
size more than 10 cm
globular / nodular soft tissue
less than 75% fat
chordoma location ?
body of C2
ca++ withing lesion
Simple bone cyst appearance?
lytic, fluid filled central expansile common in proximal diaphysis of femur/ humerus
absent periosteal reaction unless if fracture is present
what is the most pathognomoni sign of SBC?
fallen fragment sign
differential diagnosis of fluid fluid level
can occur within a malignant tumor
location and age for ABC
central or eccentric unlike ABC which is always central
central buttressing periosteal reaction is seen in
prximal tibial lytic lesion with soap bubble appearance?
vertebra - which part is involved in mets
pedicles as they are rich in red marrow
lytic mets dd
stomach / colon (mixed)
breast (lytic/ blastic)
ca++ pattern in MO?
what is the DD for MO?
how to differentiate MO from Parosteal OS
size will reduce over time in MO
ca++ is central in parosteal OS
brown tumor is seen in ?
assocaiated findings in HPT?
subperiosteal bone resorption radial aspect of 2nd and 3rd middle phalanges
acromial end of clavicles
soft tissue ca++