There is disclosed a medical instrument for removing tissue from a body comprising a body, and a shaft coupled to the body, wherein the shaft is substantially cylindrical. This shaft has an inner surface and an outer surface and a sharpened end. This shaft has a radius, a diameter and a longitudinal axis. The inner surface of the shaft has a thread extending along a substantial portion of the shaft and a hollow inner region on the shaft. There is also a process for removing tissue which can include using this morcellator with the thread on the inside of the shaft. There can also be a morcellator sharpener which includes a conical body formed as a substantially hollow cone having both an inner grinding surface and an outer grinding surface wherein the sharpener is rotatably mounted to the stand.
