Orthopedics > OCOSH Classification > Investigations > Radiology - General > Radiology - Signs

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Signs and features in orthopaedic and related musculoskeletal radiology
[OCOSH Code: D011871 365853002 INV_RAD_S]

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Schmorl node CHORUS

Location: http://chorus.rad.mcw.edu/doc/01016.html

Member Ratings: 10 out of 10 stars (1 vote)

chondrification defects where periosteal vessels penetrate cartilage plates of disc
* Xray:
o concave defects at upper and lower vertebral endplates with sharp margins produced by herniation of disc material
* MRI:
o...
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2010 The ischial spine sign CORR Open Access

Location: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2816767

Although the ischial spine sign (ISS) has been advocated to detect acetabular retroversion, it is unknown whether the sign is valid on anteroposterior (AP) pelvic radiographs with tilted or rotated pelves. We therefore evaluated reliability of the ISS as a tool for diagnosing acetabular retroversion in the presence of considerable...
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View Details Visit Resource Review It Rate It Bookmark It Added: Wed May 04 2011

absent nasal septum

Location: http://chorus.rad.mcw.edu/doc/00582.html

absent nasal septum

* cocaine
* Wegener's (midline lethal granuloma)
* surgery
* trauma
* syphilis
* sarcoid
Charles E. Kahn, Jr., MD - 2 February 1995
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anterior vertebral scalloping CHORUS

Location: http://chorus.rad.mcw.edu/doc/01030.html

anterior vertebral scalloping
* Hodgkin's disease
* aortic aneurysm
* tuberculosis of the spine
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basilar invagination CHORUS

Location: http://chorus.rad.mcw.edu/doc/00614.html

dens projects into base of skull
o McGregor's line> 4.5 mm
o Chamberlain's line> 3 mm
* may --> obstructive hydrocephalus
etiology:
* 1' anomalies...
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bone scan - falsely negative metastases CHORUS

Location: http://chorus.rad.mcw.edu/doc/01108.html

* anaplastic tumors
* reticulum cell sarcoma
* renal cell Ca
* thyroid Ca
* histiocytosis
* neuroblastoma
* multiple myeloma (positive scan usually due to recent or...
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bone within a bone CHORUS

Location: http://chorus.rad.mcw.edu/doc/01060.html

mnemonic "STOP heavy metal"
* S: sickle cell disease
* T: Thorotrast
* O: osteopetrosis
* P: Paget's disease
* heavy metals
* hypervitaminosis D
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brachydactyly CHORUS

Location: http://chorus.rad.mcw.edu/doc/01023.html

excessively shortened tubular bones in hands and feet
* During the period of bone growth, the hallmark is "cone epiphysis," the apex of which protrudes into the adjacent metaphysis. Epiphyses close prematurely leading to short, broad tubular bones.
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bubbly bone lesion CHORUS

Location: http://chorus.rad.mcw.edu/doc/00538.html

Multiple radiolucencies
* fibrous dysplasia
* enchondroma
* giant cell tumor (GCT)
* non-ossifying fibroma
* osteoblastoma
* myeloma
* aneurysmal bone cyst (ABC)
* angioma
...
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calcium hydroxy apatite CHORUS

Location: http://chorus.rad.mcw.edu/doc/00616.html

* all calcification in soft tissues is hydroxyapatite
* except cartilage (chondrocalcinosis): calcium pyrophosphate
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