Radiology Notes

My notes during radiology residency, fellowship, and beyond…

Archive for the ‘spine’ Category

Disc Disease Nomenclature

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Divide axial disc into 4 quadrants of 25%:

Focal Herniation = <25% [pic] (protusion type or extrusion type) [pic]

Broad based Herniation = 25-50% [pic]

Bulge = >50% normal disc circumference.

Symmetric Disc Bulging = 100% [pic]

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Written by lmwong

January 5, 2011 at 4:00 pm

Posted in classification, neuro, spine

Vertebra Plana MELTs

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  • Metastasis, myeloma
  • Eosinophilic granuloma
  • Lymphoma
  • Trauma / TB

Written by lmwong

March 22, 2010 at 8:22 pm

Posted in bone, differential, msk, neuro, spine

Intramedullary Spinal Mass

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  • astrocytoma (MC)
  • ependymoma
  • hemangioblastoma
  • metastasis
  • MS or ADEM

Written by lmwong

February 12, 2010 at 8:46 pm

Posted in differential, neuro, spine

Scalloped Posterior Vertebral Bodies

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  • Hydrocephalus
  • Hurlers
  • Ankylosing Spondylitis
  • Achondroplasia
  • Acromegaly
  • NF-1

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Written by lmwong

January 23, 2010 at 8:15 pm

Posted in differential, neuro, spine

Epidural Abscess

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Brain

  • extension from sinuses or mastoid air cells
  • front sinus MC
  • post craniotomy and meningitis
  • extraaxial fluid collection (hypodense CT, high T2); dural contrast enhancement
  • venous thrombosis and infarction

Spine

  • discitis
  • contrast enhancement
  • narrows spinal canal

Written by lmwong

January 22, 2010 at 8:01 pm

Posted in abscess, neuro, spine

LIgamentous Ossification of Spine Differential

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  • DISH
  • Ankylosing Spondylitis
  • Severe spondylosis
  • Vitamin A toxicity
  • Fluorosis

Written by lmwong

January 21, 2010 at 7:47 pm

Posted in bone, differential, msk, spine

Ankylosing Spondylitis

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  • HLA-B27 positive
  • M>F
  • adolescents
  • findings
    • bilateral SI erosion –> ankylosing
    • bamboo spine
    • large central joints > small peripheral
  • SI findings similar in spondylitis of inflammatory bowel (UC > Crohn’s and Whipple’s)

    Written by lmwong

    January 21, 2010 at 7:45 pm

    Posted in arthritis, bone, msk, pelvic, pelvis, spine