USMLE Step 1 Radiology Buzzwords - USMLE Forums

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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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axax USMLE Forums Scout

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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.

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

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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.

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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.

6/24/2011 10:22 AM

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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.

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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.

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Coin lesion — solitary pulmonary nodule; may be cancer or granuloma. Cutter lesions — metastatic lesions to bone cortex, or Paget's.

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Crescent sign — classic sign of avascular necrosis, femoral head.

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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.

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

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

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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.

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Napkin Ring sign — see Apple core lesion above; pathology identical, but lumen more narrowed. Onion-skinning — layered look of periosteum in Ewing's Sarcoma.

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).

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Sail sign (elbow) — fat pad noted on plain film, indicative of elbow disclocation.

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Sail Sign (Chest X ray) — Thymic shadow in children seen in chest X ray.

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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.

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

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Silhouette sign — obliteration of cardiovascular silhouette due to adjacent disease, ie pneumonia, TB, etc.

6/24/2011 10:22 AM

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Stepladder appearance — distended bowel loops, often indicative of obstruction, usually SBO.

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Sunburst appearance — “clouds, clumps, and consolidated rays” of tissue emanating from bone cortex, or within bony structures, indicative of osteosarcoma.

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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.

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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 Last edited by StepTaker; 5 Days Ago at 06:08 PM. Reason: adding merge notice

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