Positive ulnar variance
Last revised by Daniel J Bell ◉ on 14 Oct 2022
Citation, DOI & article data
Citation:
Weerakkody Y, Bell D, Kite D, et al. Positive ulnar variance. Reference article, Radiopaedia.org (Accessed on 05 Feb 2023) https://doi.org/10.53347/rID-20037
rID:
20037
Article created:
30 Oct 2012 by Yuranga Weerakkody ◉
Revisions:
7 times by 5 users - see full revision history
Systems:
Synonyms:
- Positive ulnar variances
Positive ulnar variance describes where the distal articular surface of the ulna is more than 2.5 mm distal to the articular surface of the radius.
It plays important role in wrist pathology such as ulnar impaction syndromes and thinning of the triangular fibrocartilage complex.
Radiographic features
Maximum forearm pronation results in an increase in positive ulnar variance, whereas maximum forearm supination decreases ulnar variance 1.
See also
References
- 1. Cerezal L, del Piñal F, Abascal F, García-Valtuille R, Pereda T, Canga A. Imaging Findings in Ulnar-Sided Wrist Impaction Syndromes. Radiographics. 2002;22(1):105-21. doi:10.1148/radiographics.22.1.g02ja01105 - Pubmed
- 2. DiFiori J, Puffer J, Mandelbaum B, Dorey F. Distal Radial Growth Plate Injury and Positive Ulnar Variance in Nonelite Gymnasts. Am J Sports Med. 1997;25(6):763-8. doi:10.1177/036354659702500607 - Pubmed
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skeleton of the upper limb
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accessory ossicles of the wrist (mnemonic)
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hand joints
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metacarpophalangeal joints
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arteries
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arteries
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- terminal branches
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