Intercalary prosthetic reconstruction for pathologic diaphyseal humeral fractures due to metastatic tumors: outcomes and improvements.

BACKGROUND

There is a high aseptic loosening rate for intercalary prosthetic reconstruction for malignant tumors. We evaluated outcomes and complications of intercalary prosthetic reconstruction for pathologic diaphyseal humeral fractures and report the application of an extracortical plate that can prevent early loosening.

METHODS

We retrospectively analyzed 9 patients who underwent intercalary prosthetic reconstruction for pathologic diaphyseal humeral fractures secondary to metastatic diseases between March 2011 and September 2017. Procedures were intercalary prosthetic reconstruction in 4 patients (group A) and an implanted intercalary prosthesis with a plate in 5 patients (group B). Operative time, blood loss, complications, and functional score were noted.

RESULTS

Mean operative time for group A and B was 80 ± 14 and 94 ± 5 minutes, respectively; blood loss was 115 ± 26 and 120 ± 31 mL respectively; and follow-up was 11.5 ± 10.1 and 6.2 ± 4.4 months, respectively. At final follow-up, all patients in group A had died, and 3 patients in group B had died; mean survival was 11.5 ± 10.1 and 9.3 ± 1.2 months, respectively. The mean postoperative Musculoskeletal Tumor Society score was 24.5 ± 2.4 and 26.2 ± 0.8, respectively. The mean postoperative American Shoulder and Elbow Surgeons score was 85.5 ± 4.20 and 87 ± 2.6, respectively. There were no significant differences between the 2 groups (P > .05). There was 1 aseptic loosening and 1 radial nerve injury in group A; there were no complications in group B.

CONCLUSIONS

The intercalary prosthesis yielded satisfactory outcomes in patients with pathologic diaphyseal humeral fractures, and an extracortical plate can prevent early aseptic loosening.