Tumor: Chondroid Lesions

Question 1

Describe XR appearance enchondroma
Where find enchondromas

Answer 1

Ca in bone
Metaphysis long bones
Hands / feet - reason for pathologic frx

Question 2

What is Ollier disease

Answer 2

Multiple enchondromas - slightly higher chance malig trans to chondrosarc
Will usually give you hand XR

Question 3

What is Mafucci disease

Answer 3

Enchondromas + hemangiomas
Higher risk than Ollier for trans to chondrosarc / angiosarc

Question 4

Describe appearance of osteochondroma

Answer 4

Confluence w/ IM canal
Sessile vs pedunculated (cart cap <2cm)

Question 5

Disease associated with osteochondromas

Answer 5

MHE
AD
EXT 1/2/3 - tumor suppressor gene
Higher risk malig trans osteochondroma -> chondrosarc

Question 6

What is the difference between an MHE chondrosarc vs others

Answer 6

Usually lower grade - can resect only

Question 7

Chondrosarcoma
- Additional imaging
- Staging studies
- Trt

Answer 7

Img: MRI entire bone, grows up/down the canal
Stage: chest
Trt: wide excision only - grows too slow to be effected by rads/chemo

Question 8

Kid
Tibial shark bite
Trt

Answer 8

Chondromyxoid fibroma
@metaphysis
Benign but aggressive: currett +/- ORIF

Question 9

Lytic epiphyseal lesion kid, painful

Answer 9

Chondroblastoma

Question 10

Chondroblastoma
1. XR findings
2. MR findings
3. Histo
4. Trt

Answer 10

KIDS
XR: lytic lesion epiphysis
MR: edema
Histo: chondroblasts with Ca ring (chicken wire)
Trt: currett BG v cement +/- ORIF