Lucent lesions: Classic looks and locations

Question 1

long lesion in a long bone

Answer 1

FD

Question 2

groundglass

Answer 2

FD

Question 3

Lytic lesion with a hazy matrix

Answer 3

FD

Question 4

chondroid matrix in the proximal humerus or distal femur

Answer 4

enchondroma

Question 5

lucent lesion in the finger or toe

Answer 5

enchondroma

Question 6

epiphseal tibial lesion in a teenager

Answer 6

chondroblastoma

Question 7

epiphyseal equivalent lesion

Answer 7

chondroblastoma or GCT (technically grow into epiphysis)

Question 8

lucent lesion in the greater trochanter

Answer 8

chondroblastoma

Question 9

lucent lesion with a fallen fragment in the humerus

Answer 9

SBC

Question 10

calcaneal lesion with central calcification

Answer 10

lipoma

Question 11

lucent lesion in the skull in a kid

Answer 11

EG

Question 12

vertebra plana kid

Answer 12

EG

Question 13

vetebra plana adult

Answer 13

mets

Question 14

sequestrum / nidus in the tiba / femur

Answer 14

osteoid osteoma

Question 15

painful scoliosis

Answer 15

osteoid osteoma

Question 16

calcified lesion in the posterior element of the c-spine

Answer 16

osteoblastoma

Question 17

multiple sclerotic lesion

Answer 17

mets

Question 18

multiple sclerotic lesions centered around a joint

Answer 18

osteopoikolosis

Question 19

mutiple lucent lesions (older than 40)

Answer 19

mets, myeloma, metastatic NHL

Question 20

nidus < 2.0 cm

Answer 20

osteoid osteoma

Question 21

nidus > 2.0 cm

Answer 21

osteoblastoma

Question 22

well-defined lytic lesoin in the cortex of a long bone with a sclerotic rim < cm

Answer 22

fibrous cortical defect

Question 23

well-defined lytic lesion in the cortex of a long bone with sclerotic rim > 3 cm

Answer 23

NOF

Question 24

chondral lesion in a long bone 1-2 cm

Answer 24

probably enchondroma

Question 25

chondral lesion in a long bone >4-5 cm

Answer 25

increased risk of low-grade chondrosarcoma