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| *[http://library.med.utah.edu/WebPath/RENAHTML/RENAL004.html Horseshoe kidney (utah.edu)]. | | *[http://library.med.utah.edu/WebPath/RENAHTML/RENAL004.html Horseshoe kidney (utah.edu)]. |
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| ==Multicystic renal dysplasia== | | ==Multicystic dysplastic kidney== |
| *Abbreviated ''MRD''. | | *[[AKA]] ''multicystic renal dysplasia'' (abbreviated ''MRD''). |
| ===General===
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| *Most common cause of abdominal mass in newborns.<ref name=emed_mrd/>
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| *Subtype of renal dysplasia.<ref name=emed_mrd>URL: [http://emedicine.medscape.com/article/982560-overview http://emedicine.medscape.com/article/982560-overview]. Accessed on: 4 January 2012.</ref>
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| *May be unilateral or involve only part of a kidney.<ref name=Ref_Klatt237>{{Ref Klatt|237}}</ref>
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| ===Gross===
| | {{Main|Multicystic dysplastic kidney}} |
| *Kidney has multiple large cysts or differing sizes.
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| DDx:
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| *[[ARPKD]] - has less variability of cyst size.
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| Images:
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| *[http://library.med.utah.edu/WebPath/RENAHTML/RENAL043.html MRD (utah.edu)].
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| *[http://radiology.uchc.edu/eAtlas/GU/551.htm MRD (radiology.uchc.edu)].
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| ===Microscopic===
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| Features:<ref name=Ref_Klatt237>{{Ref Klatt|237}}</ref>
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| *Cystic spaces.
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| *Fibrous stroma.
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| *Islands of cartilage.
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| Image:
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| *[http://library.med.utah.edu/WebPath/TUTORIAL/RENCYST/RCYST012.html RMD (utah.edu)].
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| ==Renal medullary dysplasia== | | ==Renal medullary dysplasia== |