Abstract: A surgical instrument for removal of a conical section the cervix for pathological examination is disclosed. The device includes a circular knife having a plurality of double-edged blades, the edges of adjacent blades enclosing against one another when the device is operated from unengaged to engaged positions. A hollow plunger is further disclosed used to actuate the circular knife. Novel pivot devices are additionally included to provide translational movement of the hollow plunger bar. A pronged stabilization rod is disclosed to prevent the circular knife from moving away from the target tissue during a cutting stroke. The device is an improvement over prior devices and procedures in that it provides a precision conical tissue sample ideal for analysis with minimal resulting bleeding.