1. Surgical Mystery: Where Is the Missing Pituitary Rongeur Tip?

2. Subsequent imaging studies demonstrated the presence of the rongeur tip in the left ventricle.

3. Subsequently, the referring surgeon noted that the pituitary rongeur tip was missing.

4. The initial posterior bone work is done using rongeur to remove the process spinous and any accessible bone fragments.

5. The utility model discloses a bone rongeur which belongs to the instrument for operation and mainly comprises a coupling rongeur handle.

6. Conclusion. Close multidisciplinary collaboration allowed for proper diagnosis and the safe retrieval of the missing rongeur tip from the left ventricle.

7. We present a case report in which the contralateral ureter was injured by rongeur instrument after a left lumbar discectomy.

8. Thin bone plates were taken out with detacher and thick with rongeur.

9. The bone in the area should be smoothed with a rongeur or bone file.