Modified lateral extracavitary approach for vertebral column resection and expandable cage reconstruction of thoracic spinal metastases.

BACKGROUND

Spinal metastasis is common and can be associated with considerable morbidity. Vertebral resection and reconstruction have been shown to preserve neurological function and decrease pain. Most commonly, two-stage, combined anterior/posterior approaches are performed to surgically address significant vertebral metastasis. Recently, single-stage posterior approaches for vertebrectomies have been performed more often as a result of advances in instrumentation and anesthesia. The objective is to describe a series of patients with metastatic thoracic spine tumors who were treated using a modified, lateral extracavitary approach for a posterior-only vertebral column resection and expandable cage reconstruction.

METHODS

A retrospective analysis of 21 cases and 20 patients was performed.

RESULTS

The average estimated blood loss and length of surgery were 1700 ml (range, 200-7600 ml) and 6.8 h (range, 4-9 h), respectively. The mean follow-up was 14 months (range, 4-30 months). One patient had a permanent neurological deficit as a result of a postoperative hematoma. Of the five patients who were unable to walk prior to surgery, two regained the ability to ambulate. The total complication rate was 43% with majority being minor. A total of 94% of patients had durable preservation of the neurological function.

CONCLUSION

The posterior approach for vertebral column resection and reconstruction is a viable alternative to the standard combined approach. We demonstrate the feasibility of performing the lateral extracavitary approach through a midline incision from T1 to T12. This less invasive approach continues to evolve as instrumentation becomes more advanced and possesses significant advantages in the oncologic setting.