대한흉부영상의학회 Korean Society of Thoracic Radiology

Discussion

Diagnosis With Brief Discussion

Courtesy

Kangnam St. Mary's Hospital, TheCatholic University

Imaging Findings

- Plain : multiple, well-defined, lobulated, medullary osteolytic tumor with/without calcification in cartilaginous matrix
- MR : low SI on T1WI, high SI on T2WI

Malignant Transformation (5 to 30%)

- Most frequently, chondrosarcoma

- Less frequently, dedifferentiated chondrosarcoma,

osteosarcoma or chondroid chordoma



- Imaging Findings

1. More than 8 cm

2. Pain, soft tissue mass

3. Disappearance of pre-existing calcification

4. ? Radiolucent area

5. Pathologic fracture

Discussion

Clinical Findings
- Usually appears in the first decade of life

- Palpable bony mass

- Asymmetric shortening of the extremities

- Osseous deformity related to fracture

Clinical Course of Enchondroma

- Disappear during growth and displaced by normal bone

- Do not increase unless malignant transformation,

after cessation of growth


Involving sites

- Most frequently, long tubular bone (tibia, femur, fibula)

- Less frequently, metacarpal,metatarsal bone

- Flat bone : pelvis, rib



Complications

- In childhood : pathologic fracture

- In adult : malignant transformation

- Most frequently in femur

Reference

Clinical Findings
- Usually appears in the first decade of life

- Palpable bony mass

- Asymmetric shortening of the extremities

- Osseous deformity related to fracture

Clinical Course of Enchondroma

- Disappear during growth and displaced by normal bone

- Do not increase unless malignant transformation, after cessation of growth


Involving sites

- Most frequently, long tubular bone (tibia, femur, fibula)

- Less frequently, metacarpal,metatarsal bone

- Flat bone : pelvis, rib



Complications

- In childhood : pathologic fracture

- In adult : malignant transformation

- Most frequently in femur

Keywords

Rib, Benign tumor,