Objective: To describe the origin and development of Fibrous Cortical defect (FCD) [or Metaphyseal Fibrous Defect (MFD)] and Nonossifying fibroma (NOF).

• 摘要目的：为阐明纤维性皮质骨缺损(FCD)或骨干骺端皮质缺损(MFD)与非骨化性纤维瘤(NOF)发生、发展的衍变过程。