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Tibial Varum
(Blount disease)
What it Measures
The inward angulation of the tibia below the knee. In Blount disease, this angulation results from abnormal growth at the medial tibial growth plate.
Significance
- Influences lower-limb alignment and force transfer
- Shifts weightbearing laterally during stance and gait
Normal Value
- 4°–6° varus
Exam containing this measurement:
| | BIQ 24 |
| | BIQ 10 |
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About
Tibial Varum describes the inward tilt of the tibia below the knee. In Blount disease, excessive mechanical loading and growth-plate disruption cause the tibia to bow progressively inward. This deformity alters how the leg manages force and distributes pressure during standing and walking.
When the tibia angles inward, the body compensates to maintain balance and forward movement. The knee absorbs more medial compression, while the foot often compensates with excessive pronation to keep the foot flat on the ground.
These compensations place additional stress on the knee, ankle, and hip and may decrease gait efficiency.
Because Blount disease is progressive, early detection of tibial varum is important to prevent worsening deformity and future joint problems.
Tibial Varum
(Blount disease)
What it Measures
The inward angulation of the tibia below the knee. In Blount disease, this angulation results from abnormal growth at the medial tibial growth plate.
Significance
- Influences lower-limb alignment and force transfer
- Shifts weightbearing laterally during stance and gait
Normal Value
- 4° - 6° varus
Hide/show illustrations
Exam containing this measurement:
| | BIQ 24 |
| | BIQ 10 |
About
Tibial Varum describes the inward tilt of the tibia below the knee. In Blount disease, excessive mechanical loading and growth-plate disruption cause the tibia to bow progressively inward. This deformity alters how the leg manages force and distributes pressure during standing and walking.
When the tibia angles inward, the body compensates to maintain balance and forward movement. The knee absorbs more medial compression, while the foot often compensates with excessive pronation to keep the foot flat on the ground. These compensations place additional stress on the knee, ankle, and hip and may decrease gait efficiency.
Because Blount disease is progressive, early detection of tibial varum is important to prevent worsening deformity and future joint problems.