Coccydynia due to a benign notochordal cell tumor.

Study Design: Case report.

Objective: To present a rare case of a notochordal cell tumor.

Summary Of Background Data: We report on a 27-year-old female patient with pain at the lower back and muscle cramps in the area of the right hip.

Navigated Iso-C3D-based percutaneous osteoid osteoma resection: a preliminary clinical report.

Minimally invasive osteoid osteoma resection under computer tomography (CT) guidance has yielded good results and has become a viable alternative to open surgical procedures. Limited visualization of the actual drill position under CT guidance can frequently result in inadequate and malpositioned drilling, especially at lesions located in less accessible anatomic regions. With the conventional CT-guided drilling technique, sterility and general operative management poorly correlate with standard operating room conditions, and are at risk of intra- and postoperative complications.