MSK lesions

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Author:
technochino
ID:
21241
Filename:
MSK lesions
Updated:
2010-05-31 13:59:57
Tags:
MSK epiphyseal lytic
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Description:
MSK lesions
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  1. Epiphyseal lytic lesions
    • Geode (OA, CPPD, RA, AVN)
    • Intraosseous ganglion
    • Giant Cell Tumor
    • Chondroblastoma
    • Clear cell chondrosarcoma
    • EG
    • Infection (Brodie's abscess)
    • Brown Tumor
    • Subchondral cyst
  2. Aggressive diaphyseal lesion in young patient?
    Ewing sarcoma
  3. Metaphyseal MSK lesions?
    • Sarcomas:
    • - chondro
    • - osteo
    • - fibro
  4. Multiple lytic lesions
    "FEEMHI"

    • Fibrous dysplasia
    • EG
    • Enchondroma
    • Mets, Multiple Myeloma
    • Hyperparathyroidism
    • Infection
  5. Blastic bony lesions?
    • Bone island
    • Mets
    • - prostate
    • - breast
    • - GU
  6. What is osteopoikilosis?
    • Multiple bone islands
    • Ephiphyses and metaphyses
    • Sometimes difficult to differentiate from mets
  7. Lytic lesions in posterior elements?
    GO APE

    • GCT
    • Osteoblastoma
    • ABC
    • Plasmocytoma
    • EG
  8. Where do osteosarcoma mets go?
    • Lungs
    • Other bones
    • - look for skip lesions
  9. What are risk factors for secondary osteosarcoma?
    • Age >60
    • Occurs 5% of cases
    • - Pagets
    • - XRT
  10. What are the chondroid tumors?
    • BENIGN
    • - enchondroma
    • - chondroblastoma
    • - osteochondroma

    • MALIGNANT
    • - chondrosarcoma
  11. DDx for fluid-fluid levels in the bones?
    • ABC
    • Chondroblastoma
    • Osteoblastoma
    • GCT
    • Telangectatic osteosarcoma
  12. Features of a LCH?
    • Geographic lytic lesion
    • Non sclerotic margin
    • No matrix
  13. Features of Giant Cell Tumor?
    • 1) Skeletally mature
    • 2) Eccentric
    • 3) Subarticular
    • 4) Non sclerotic, narrow zone of transition

    Knee (65%) , Wrist (15%) , Pelvis (15%)
  14. Features of a chordoma
    • - low grade malignancy which arises from notochord remnants
    • - locally aggressive with a soft tissue component
    • - sacrum > clivus > vertebral body

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