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Type 1 deformity in a 25-year-old woman. Fibrous dysplasia is present throughout the entire femur. The proximal end is irregularly shaped. The neck-shaft angle is normal (135°), but a distal shaft 16° valgus deformity is present. Shaft cortices are present, although thinner than normal. Permission received from Matteo Benedetti Valentini MD, from the Department of Orthopaedic Surgery of the University of Tor Vergata, Rome, Italy, for reproducing the scheme on the right.
