[Total modular hip arthroplasty for fracture in pathological terrain secondary to fibrous dysplasia. Presentation of a clinical case and literature review].

Fibrous dysplasia (FD) is a benign tumor condition in which normal bone is replaced by structurally deficient fibrous lamellar bone. It represents approximately 5-7% of benign bone tumors and occurs in two presentations: monostotic, which is the most common, and polyostotic. The proximal femur is one of the most common locations for benign tumors, including FD.