Reconstruction with modular hemipelvic prosthesis for the resection of solitary periacetabular metastasis

The outcomes of patients with solitary metastasis around the acetabulum who received en bloc resection and reconstruction are unclear. The purpose is to evaluate the oncologic results, complications, and functional outcomes in these patients.

Fifteen patients who underwent periacetabular resection and modular endoprosthetic reconstruction were reviewed retrospectively.

Eleven patients were alive and four had died of their respective diseases. The mean follow-up time for the living patients and the non-surviving patients was 32 and 11 months, respectively. One of the three patients presented with local recurrence received hindquarter amputation. Five patients with superficial wound problem were treated with debridement and were healed eventually. Two patients who had hip dislocation received closed reduction. Pain was relieved in most patients, and ten patients were able to walk outside their house. The average MSTS 93 score was 20.9 of a total of 30 points (69.7%). When evaluated according to the modified Allan scoring system, postoperative scores on pain, independence, and mobility had significant improvement.

En bloc tumor resection and reconstruction with modular hemipelvic prosthesis in patients who had a solitary periacetabular metastasis can provide long-term survive, tumor local control, low complication rate, and good functional recovery.