las dos primeras son de eurodic.

Dedifferentiated Chordoma: a Case Report
... 1998, total extirpation of the tumor, pelvic exenteration and partial extirpation
of the sacrum were carried out at the National Cancer Center Hospital, Tokyo ...
wwwinfo.ncc.go.jp/jjco/Volume_28/Issue_12/html/hyb188_gml.html

I know you already awarded the points, but I would like to point out that "extirpation" is not a very commun term used in the orthopaedic field it is more likely you would hear resection.

I've heard extirpation for example in tumors.

From google:
Although radical resection is the best treatment for malignant sacral tumors, total sacrectomy for such tumors has been performed in only a few instances. Total sacral resection requires reconstruction of the pelvic ring plus establishment of a bilateral union between the lumbar spine and iliac bone. This technique is illustrated in two patients harboring large, painful, sacral giant-cell tumors that were unresponsive to prior treatment. These patients were treated with complete en bloc resection of the sacrum and complex iliolumbar reconstruction/stabilization and fusion.
www.neurosurgery.org/focus/sept97/3-3-p2.html

Técnicas quirúrgicas adecuadas con resección del sacro a distintas alturas, resección de órganos invadidos y reconstrucción con colgajos miocutáneos permiten prolongar la vida en mejores condiciones y en algunos casos curar estos pacientes.

Trabajé con un ortopedista en la traducción de un libro de ahí mi experiencia en el campo.