1Lichtenstein JR, Bilbrey GL, McKusick VA. Clinical and probable genetic heterogeneity within mucopolysaccharidosis. Ⅱ. Report of a family with a mild form. Johns Hopkins. Med J, 1972, 131:425
2Dunham WK, Marcus NW, Enneking WF,et al. Developmental defects of the distal femoral metaphysis. J Bone Joint Surg, 1980, 62:801
3Winlner D. Radiology of bone tumors and allied disorders. Philadelphia: Saunders, 1982, 37:551
4Dahlin C, Linde A, Gottlow J,et al. Healing of bone defects by guided tissue regeneration. Plast Reconstr Surg, 1988, 81:672
5Resnick D, Greenway G. Distal femoral cortical defects, irregularities and excavations. Radiology, 1982, 143:345
6Keats TE, Joyce JM. Metaphyseal cortical irregularities in children: A new perspective on a multi-focal growth variant. Skeletal Radiol, 1984, 12:112
