Professional
Technical
IVT
metaphyseal-diaphyseal angle
The angle between the metaphysis and diaphysis used to assess lower extremity alignment.
Full Definition
The metaphyseal-diaphyseal angle is a radiographic measurement used to assess the angular relationship between the metaphysis and diaphysis of long bones, particularly in pediatric orthopedics. This measurement is commonly applied to the distal femur and proximal tibia to evaluate for angular deformities such as infantile tibia vara (Blount disease). Normal values vary with age, and abnormal angles may indicate pathological conditions requiring monitoring or intervention such as guided growth or corrective osteotomy.
Usage
Usage note: Hyphenate when used as compound adjective; specify which bone and location being measured.
In Context
- "The metaphyseal-diaphyseal angle measured 16 degrees, exceeding normal values for the patient's age." — Radiology measurement
- "Progressive increase in the metaphyseal-diaphyseal angle suggested developing tibia vara requiring intervention." — Serial imaging assessment
Also known as
MDA
tibiofemoral angle
Don't confuse with
neck-shaft angle
lateral distal femoral angle