
1) Ablation 2) Cutting out 3) Excision 4) Extirpation
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https://www.crosswordclues.com/clue/mastoidectomy

A Mastoidectomy is a procedure performed to remove the mastoid air cells. This can be done as part of treatment for mastoiditis, chronic suppurative otitis media or Cholesteatoma. In addition, it is sometimes performed as part of other procedures (cochlear implant) or for access to the middle ear. There are classically 5 different types of Mastoid...
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http://en.wikipedia.org/wiki/Mastoidectomy

<procedure> Hollowing out of the mastoid process by curretting, gouging, drilling, or otherwise removing the bony partitions forming the mastoid cells. ... Origin: mastoid (process) + G. Ektome, excision ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

(mas″toid-ek´tә-me) surgical removal of mastoid cells; the most frequent indication for this is chronic infection in the mastoid process as a complication of chronic otitis media. The extent of surgery depends on extent of destruction. A radical mastoidectomy involves removal of diseased portions of the mast...
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http://www.encyclo.co.uk/local/21001

Removal of the mastoid process in the middle ear
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http://www.generalandmedical.com/glossary/index_alpha_Results.html?mode=M

Type: Term Pronunciation: mas′toy-dek′tŏ-mē Definitions: 1. A group of operations on the mastoid process of the temporal bone and middle ear to drain, expose, or remove an infectious, inflammatory, or neoplastic lesion.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=53088

[
n] - surgical removal of the mastoid process
Found on
http://www.webdictionary.co.uk/definition.php?query=mastoidectomy

mastoidectomy The surgical removal of mastoid air cells during which the surgery may extend into the middle ear. Mastoid air cells are open, air-containing spaces in the skull, behind the ear. The surgery used to be a common way to treat an infection in the mastoid air cells, which usually came from an ear infection that spread to the nearby bone...
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http://www.wordinfo.info/words/index/info/view_unit/1260/
noun surgical removal of some or all of the mastoid process
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.