Radiology Notes

My notes during radiology residency, fellowship, and beyond…

Archive for the ‘lytic’ Category

Lytic Bone Lesions Based on Margin

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Geographic IA: (well defined, geographic, sclerotic)

  • bone cyst
  • brodie abscess
  • cartilage lesions (chondroblastoma, chondromyxoid fibroma,¬†enchondroma)
  • fibroxanthoma
  • fibrous dysplasia

Geographic IB: (no sclerosis)

  • giant cell tumor
  • myeloma/mets
  • bone cyst
  • cartilage lesions

Geographic 1C: (ill-define border, single focal lesion)

  • chondrosarcoma
  • enchondroma
  • MFH/ibrosarcoma
  • Giant cell tumor/ABC/CMF
  • Osteosarcoma
  • Mets/myeloma

Permeative/Motheaten:

  • Ewing sarcoma
  • round cell tumors
  • malignant fibrous histiocytoma/fibrosarcoma
  • osteomyelitis
  • osteosarcoma
  • Langerhans cell histiocytosis
  • mets/myeloma

Written by lmwong

May 1, 2010 at 9:10 am

Posted in bone, differential, lytic, msk

Nonossifying Fibroma

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  • Very common
  • must be younger than 30 yo, painless
  • cortical defect
  • metaphysis of long bone
  • thin, sclerotic border
  • scalloped and slightly expansile
  • “don’t touch” lesion
  • CT will show interuption in cortex

Written by lmwong

May 31, 2008 at 2:44 pm

Posted in bone, lytic, msk

Enchondromas

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  • most common lytic lesion of phalanges
  • calcified chondroid matrix, excpet in phalanges
  • Ollier disease = multiple
  • Maffucci syndrome = multiple enchondromas + soft tissue hemangiomas

Written by lmwong

May 31, 2008 at 2:37 pm

Posted in bone, lytic, msk

Fibrous Dysplasia

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  • no periosteal reaction
  • no malignant potential
  • pelvis, femur, ribs, skull
  • posterior ribs, expansile and lytic
  • ground glass or smoky matrix

Adamantinoma = FD in tibia
McCune-Albright Syndrome = Polyostostic FD, cafe-au lait spots, precocious puberty
Cherubism = FD in jaw

Written by lmwong

May 31, 2008 at 2:33 pm

Posted in bone, lytic, msk

Benign Lytic Bone Lesions <30yo

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Written by lmwong

April 4, 2008 at 1:41 pm

Posted in bone, differential, lytic, msk

Benign Lytic Bone Lesions

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  • Fibrous Dysplasia
  • Enchondroma
  • Eosinophlic granuloma
  • Giant Cell Tumor
  • Nonossifying fibroma
  • Osteoblastoma
  • Mets
  • Myeloma
  • Aneurysmal Bone Cyst
  • Solitary Bone Cyst
  • Hyperparathyroidism
  • Infection
  • Chondroblastoma
  • Chondromyxoid

Written by lmwong

April 4, 2008 at 1:28 pm

Posted in bone, differential, lytic, msk