USMLE Step 1 Radiology buzzwords - USMLE Forums
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USMLE Step 1 Buzzwords Buzzwords that should ring a bell in USMLE Step 1 exam.


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  #1  
Old 06-04-2011
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X Ray USMLE Step 1 Radiology buzzwords

Apple Core lesion — signifies annular carcinomas of the colon—looks like an apple core or napkin ring(see below) due to circumferential narrowing of the lumen, noted on contrast studies.

USMLE Step 1 Radiology buzzwords-apple-core-lesion.jpg
click image to enlarge

Bamboo Spine — fused spinal segments with their syndesmophytes look, on radiographs, similar to bamboo stalks—classically associated with ankylosing spondylitis.

USMLE Step 1 Radiology buzzwords-bamboo-sign.jpg
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Bird's Beak — noted on Upper GI with contrast, a dilated upper/middle esophagus with an abrupt taper to exceptionally narrowed lumen, typical of achalasia.

USMLE Step 1 Radiology buzzwords-birds-beak.jpg
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Boot-shaped Heart — due to RVH, the LV is lifted above the edge of the diaphragm, forming the “toe” of the boot. Classic for Tetralogy of Fallot.

USMLE Step 1 Radiology buzzwords-boot-shaped.gif
click image to enlarge

Bat's Wing/Butterfly — this appearance on CXR is classically associated with CHF and resultant pulmonary edema.

Cobblestone appearance — this sign is produced on barium studies due to ulcerative pockets, usually in the terminal ileum, indicative of Crohn's.

USMLE Step 1 Radiology buzzwords-cobblestone.jpg
click image to enlarge

Codman's Triangle — a triangle on plain film of extremities that signifies reactive bone, classically associated with osteosarcoma, or other infectious/hemorrhagic process that causes periosteal elevation.

USMLE Step 1 Radiology buzzwords-codmantriangle.jpg
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Coin lesion — solitary pulmonary nodule; may be cancer or granuloma.

Cutter lesions — metastatic lesions to bone cortex, or Paget's.

USMLE Step 1 Radiology buzzwords-cutter-lesions.jpg
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Crescent sign — classic sign of avascular necrosis, femoral head.

USMLE Step 1 Radiology buzzwords-crescent-sign.gif
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Egg-on-a-string — a large, ovoid-shaped heart on newborn CXR, classically signifying complete transposition of the great vessels with intact ventricular septum.

USMLE Step 1 Radiology buzzwords-egg-string-transposition-great-arteries-amersham.jpg
click image to enlarge

Ground glass — a “white-out” on CXR, usually PCP pneumonia or ARDS.

USMLE Step 1 Radiology buzzwords-groundglass.jpg

Hampton's Hump — a peripheral triangle, usually near pleural edges, classically PE.

USMLE Step 1 Radiology buzzwords-hamptons-hump.jpg
click image to enlarge

Honeycomb lung — used to describe any pathologic process that causes radiographic appearance of multiple small, thick-walled cystic spaces; e.g. pulmonary fibrosis.

Lead pipe sign — classic narrowing of bowel lumen, with loss of haustra—UC.

USMLE Step 1 Radiology buzzwords-lead-pipe.jpg
click image to enlarge

Napkin Ring sign — see Apple core lesion above; pathology identical, but lumen more narrowed.

Onion-skinning — layered look of periosteum in Ewing's Sarcoma.

USMLE Step 1 Radiology buzzwords-onion-ewign-sarcoma.jpg

Rachitic Rosary — this is a “string of beads” appearance on x-ray, a thickening of costochondral margins that is noted in Ricketts(Vit. D Deficiency).

USMLE Step 1 Radiology buzzwords-rachitic-rosary.jpg
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Sail sign (elbow) — fat pad noted on plain film, indicative of elbow disclocation.

USMLE Step 1 Radiology buzzwords-sail-sign.jpg
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Sail Sign (Chest X ray) — Thymic shadow in children seen in chest X ray.

USMLE Step 1 Radiology buzzwords-sail-sign-cxr.jpg
click image to enlarge

Scotty dog(collar) — on posterior oblique, the lumbar vertebrae look like a Scottish terrier. The neck is the pars interarticularis, and a break(a collar) noted there indicates spondylolysis.

USMLE Step 1 Radiology buzzwords-scotty-dog.png
click image to enlarge

String sign — thin, slightly irregular shadow in narrowed lumen of ileum, suggestive of Crohn's.

USMLE Step 1 Radiology buzzwords-string-sign.jpg
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Silhouette sign — obliteration of cardiovascular silhouette due to adjacent disease, ie pneumonia, TB, etc.

USMLE Step 1 Radiology buzzwords-silhouette-sign.jpeg
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Stepladder appearance — distended bowel loops, often indicative of obstruction, usually SBO.

USMLE Step 1 Radiology buzzwords-stepladder.jpg
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Sunburst appearance — “clouds, clumps, and consolidated rays” of tissue emanating from bone cortex, or within bony structures, indicative of osteosarcoma.

USMLE Step 1 Radiology buzzwords-sunburst-osteosarcoma.jpg
click image to enlarge

Thumb(print) sign — on lateral c-spine, an enlarged epiglottis appears as a “thumb”—epiglottitis.

Westermark's sign — abrupt end to a pulmonary vessel, signifying oligemia or PE.

USMLE Step 1 Radiology buzzwords-westermark-sign.jpg
click image to enlarge


Thanx to Myeng

If you know any more, please add to the list

Merge Notice: This post is a merger of two posts; the second post contained images posted by Hohepa

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Last edited by StepTaker; 06-17-2011 at 06:08 PM. Reason: adding merge notice
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  #2  
Old 06-04-2011
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WOW..it is really helpful!!
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wonderful!!!!!!!!!!
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fantabulous...really goooood work man.....
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Old 07-02-2012
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Awesome wirk..

People Add others as well if you remember..

Steeple sign - croup

Mercedes Benz sign- in cholesterol gall stones

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Thanks man...
Thumbprint sign: epiglottitis.
Saw tooth appearance in barium: diverticulosis.
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great work....
thnx...
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you guys are jus amazin tanx
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Wowwwwww........... fantabously fantastic :-)) thanks buddy :-)
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Old 04-28-2013
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USMLE Step 1 Radiology buzzwords-notched-rib.jpg
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notched ribs sign Coarcitation of Aorta
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Old 02-21-2014
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thumbprint sign on abdominal XR = ischemic colitis
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Old 05-12-2014
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1 doubt. Do they really ask all these. Like mercbenz sign which isn't mentioned in our buks
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That's fantastic!
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Old 05-30-2014
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Don't know how to thank you!!!!!!!!
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Radiology for Step 2 | Step II | Student Doctor Network This thread Refback 04-12-2013 06:25 AM
Radiology for Step 2 | Step II | Student Doctor Network This thread Refback 07-13-2012 06:24 AM
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Radiology for Step 2 | Step II | Student Doctor Network This thread Refback 08-30-2011 01:49 PM
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