The Journal of Bone and Joint Surgery (American). 2005;87:226-236.
doi:10.2106/JBJS.E.00253
© 2005 The Journal of Bone and Joint Surgery, Inc.
Partial Epiphyseal Preservation and Intercalary Allograft Reconstruction in High-Grade Metaphyseal Osteosarcoma of the Knee
D. Luis Muscolo, MD1,
Miguel A. Ayerza, MD1,
Luis A. Aponte-Tinao, MD1 and
Maximiliano Ranalletta, MD1
1 Institute of Orthopedics "Carlos E. Ottolenghi," Italian Hospital
of Buenos Aires, Potosí 4215, (1199) Buenos Aires, Argentina.E-mail
address for D.L. Muscolo:
luis.muscolo{at}hospitalitaliano.org.ar
Investigation performed at the Institute of Orthopedics "Carlos
E. Ottolenghi," Italian Hospital of Buenos Aires, Buenos Aires,
Argentina
The original scientific article in which the surgical technique was
presented was published in JBJS Vol. 86-A, pp. 2686-2693, December
2004
The authors did not receive grants or outside funding in support of their
research or preparation of this manuscript. They did not receive payments or
other benefits or a commitment or agreement to provide such benefits from a
commercial entity. No commercial entity paid or directed, or agreed to pay or
direct, any benefits to any research fund, foundation, educational
institution, or other charitable or nonprofit organization with which the
authors are affiliated or associated.
BACKGROUND:
The purpose of this study was to analyze a series of patients with a
high-grade metaphyseal osteosarcoma of the knee who had been treated with a
transepiphyseal resection, with preservation of the distal femoral and the
proximal tibial (articular) portions of the epiphysis, and an intercalary
allograft reconstruction.
METHODS:
The cases of thirteen patients with a high-grade metaphyseal osteosarcoma
around the knee who had transepiphyseal resection and reconstruction with an
intercalary allograft were retrospectively reviewed at a mean of sixty-three
months. Complications, disease-free survival of the patient, final
preservation of the limb and epiphysis, and functional results according to
the Musculoskeletal Tumor Society scoring system were documented at the time
of the latest follow-up.
RESULTS:
At the final follow-up examination, eleven of the thirteen patients
continued to be disease-free. One patient died of bone and pulmonary
metastases with no evidence of local recurrence, and the remaining patient had
no evidence of disease after resection of a local recurrence of the tumor in
the soft tissues. No patient had a local recurrence in the remaining
epiphysis. Seven patients had complications that included a fracture (three
patients), diaphyseal nonunion (two), deep infection (one), and a local
recurrence in the soft tissues (one). The allograft was removed in only four
of these patients. At the latest follow-up examination, twelve patients were
alive with preserved limbs. In one patient, the epiphysis, which originally
had been preserved, was resected because of a metaphyseal fracture, and the
limb was reconstructed with an osteoarticular allograft. The patients with a
preserved epiphysis had an average functional score of 27 points (maximum, 30
points).
CONCLUSIONS:
Preservation of the epiphysis in high-grade metaphyseal osteosarcoma at the
knee is an alternative in carefully selected patients. Crucial factors needed
to obtain local tumor control and achieve an acceptable functional result are
a positive response to chemotherapy, accurate preoperative assessment of tumor
extension to the epiphysis, and appropriate fixation techniques for
intercalary allografts.

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