Diagram - Metaphyseal diaphyseal angle of Drennan
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The first line is drawn along the long axis of the tibia, tangential to the cortex, and a perpendicular line to this is created. A second line is drawn along the slope of the metaphysis, and the angle created with the perpendicular line is measured.
- Cheema JI, Grissom LE, Harcke HT. Radiographic characteristics of lower-extremity bowing in children. Radiographics. 2003;23 (4): 871-80. Radiographics (full text) - doi:10.1148/rg.234025149 - Pubmed citation
- Levine AM, Drennan JC. Physiological bowing and tibia vara. The metaphyseal-diaphyseal angle in the measurement of bowleg deformities. J Bone Joint Surg Am. 1982;64 (8): 1158-63. Pubmed citation