bone tumors

Question 1

Periosteal reaction

Answer 1

onion skinning/lamellated, starburst, Codman’s triangle

Question 2

Pedal tumors

Answer 2

chondrosarcoma most common malignant foot tumor in adults

Question 3

Osteochondroma

Answer 3

most common benign bone tumor, cartilaginous origin, appears as subungual exostosis

Question 4

Chondroblastoma

Answer 4

epiphyseal lytic lesion, younger patients

Question 5

Enchondroma

Answer 5

cartilaginous, central/medullary, thin rim of sclerosis, mostly phalanges, expansive lesion with fleck-like calcifications/”stippling”

Question 6

Olliers dx

Answer 6

multiple enchondromas

Question 7

maffuccis syndrom,e

Answer 7

enchondroma with soft tissu ehemangioma

Question 8

OSTEOID OSTEOMA

Answer 8

– X-ray nidus &laquo_space;1.5 cm
* Sclerotic margin
* Lucency in the middle

Question 9

OSTEOBLASTOMA

Answer 9

Arise from osteoid
- Occurs in axial skeleton
- Nocturnal pain NOT relived with Aspirin
- HALLMARK – X-ray nidus&raquo_space; 1.5 cm

Question 10

Fibrous dysplasia

Answer 10

ground glass appearance, cortical expansion of long bones

Question 11

Non-ossifying fibroma

Answer 11

rgresses spontaneously
asymptomatic, lobulated coarse trabeculation, Jaffe-Campanucci syndrome(cafe au laiot spots, cardio)

Question 12

Unicameral bone cyst

Answer 12

“fallen fragment” sign, high recurrence after surgery

Question 13

Giant cell tumor

Answer 13

cortical expansion, “soap bubble” appearance, high correlation with Paget’s disease

Question 14

Aneurysmal bone cyst

Answer 14

vascular malformation, metaphyseal, soap bubble pattern, benign but appears locally aggressive, rapid onset of pain/swelling

Question 15

Pigmented villonodular synovitis

Answer 15

inflamed synovium, mono-articular (knee)

Question 16

hyperparathyroidism

Answer 16

Brown tumor

Question 17

Fibrous cortical defect

Answer 17

metaphyseal, inner cortical convex “bubbling”

Question 18

Chondromyxoid fibroma

Answer 18

dramatic expansion with/without cortical resorption, eccentric oval geographic lesion

Question 19

Enostosis

Answer 19

, no periosteal reaction/destruction/cortical expansion, “brush border”, bone island/bone within bone

Question 20

Multiple myeloma

Answer 20

most common malignant bone tumor in body, lytic “punched out” lesion, Bence-Jones protein, axial skeleton

Question 21

Osteosarcoma

Answer 21

“moth eaten, permeative”, soft tissue invasion, “sunburst” or “hair on end” destructive pattern, bone pain, mets to lungs

Question 22

Ewing’s sarcoma

Answer 22

from bone marrow, diaphyseal, children, “onion skin” periosteal reaction, femur and spine, pathologic fractures. Diaphyseal.

Question 23

Chondrosarcoma

Answer 23

lytic lesion with poorly defined margins, most common malignant tumor of foot in adults, endosteal scalloping, pure hyaline cartilahe, fluffy or ring and arc. dull pain and slow growing

Question 24

Fibrosarcoma

Answer 24

“permeative or moth-eaten”, not as fast in its destruction as osteosarcoma. NO periosteal reaction, amputation.