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Jackstone Calculus-a bladder stone with jagged, irregular margins indicating formation in a trabeculated bladder; from "ball and jacks" game |
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Juxtaphrenic Peak-tent-like projection of the medial hemidiaphragm seen with upper and sometimes middle lobe atelectasis |
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J-shaped Sella-sella extends under anterior clinoid process and looks like J on side; seen in normals, hydrocephalus or optic chiasm glioma |
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