Intraspinal pilocytic astrocytomas: An overview and 2-D illustrative resection technique video.

Background: Spinal cord pilocytic astrocytomas (PAs) are rare and typically occur in pediatric patients. While PAs are often well-circumscribed and amenable to gross total resection, they sometimes harbor infiltrative components that can invade normal cord parenchyma.

Methods: Here, we present a 59-year-old female with a progressive right-sided hemi-sensory loss, right-sided hemiparesis, and gait imbalance. The preoperative T2 magnetic resonance imaging revealed a large loculated cystic tumor that focally compressed the dorsal medulla, while the contrast study revealed a 1.3 cm homogenously enhancing expansile intramedullary mass centered at the C1 level.

Results: The patient underwent a C1-2 laminectomy followed by gross total intramedullary tumor resection utilizing intraoperative dorsal column mapping. There were no operative complications. The patient had preserved motor strength and an expected dorsal column dysfunction, which largely resolved over 9 months postoperatively.

Conclusion: Here, we provide a broad overview of PAs, in addition to a case study/technical note that includes a 2-D intraoperative video detailing the resection technique.