Fibrocartilaginous Dysplasia of the Proximal Femur in Two Pediatric Patients, Including a Pathologic Fracture in a Patient With McCune-Albright Syndrome

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Fetal and Pediatric Pathology


Fibrocartilaginous dysplasia (FCD) is a variant of fibrous dysplasia that often involves the proximal femur in young adults. It has a similar appearance on imaging as other entities but has stippled calcifications within the lesion. The differential diagnosis often includes benign and malignant tumors such as fibrous dysplasia, chondroblastoma, enchondroma, and chondrosarcoma. Histology is required for diagnosis and treatment is typically surgical due to the potential for pain, pathologic fracture, and deformity. We report the clinical presentation, imaging findings, and management of two pediatric patients with fibrocartilaginous dysplasia of the proximal femur to (1) highlight that recognition that fibrous dysplasia may contain cartilage upon frozen section will avoid overly aggressive therapy, and (2) FCD can occur in the McCune-Albright syndrome.

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