system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Shepherd crook deformity is seen in?
assistant
The correct answer is  ANSWER: (A) Fibrous dysplasiaREF: Sutton's 7th ed p. 1131Fibrous dysplasia in the femur, deformity due to softening, expansion and fracture gives an appearance likened to a 'shepherd's crook' and discrepancies in limb length result. Lesions are well defined and may be expanded with well-defined margins. These may be lucent, dense or a mixture of the two, with small flecks of density due to ossification