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| Valgus deformity | |
|---|---|
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| Valgus deformity of the knee (genu valgum), seen inMRI and photograph | |
| Specialty | Orthopedics |
Avalgus deformity is a condition in which the bone segmentdistal to a joint is angled outward, that is, angledlaterally, away from the body's midline.[1] The opposite deformation, where the twist or angulation is directed medially, toward the center of the body, is calledvarus.
Rheumatoid knee commonly presents as valgus knee.Osteoarthritis knee may also sometimes present with valgus deformity though varus deformity is common.Total knee arthroplasty (TKA) to correct valgus deformity is surgically difficult and requires specialized implants calledconstrained condylar knees.
Valgus is a term for outward angulation of thedistal segment of abone orjoint. The opposite condition is called varus, which is a medial deviation of the distal bone. The terms "varus" and "valgus" always refer to the direction in which the distal segment of the joint points. The original Latin definitions forvarus andvalgus were the opposite of their current usage.[2] For a discussion of theetymology of these words, see the entry undervarus. A mnemonic to remember the two deformities is that valgus contains an "L", for Lateral deviation.
