[mas-toi-dek-tuh-mee] /ˌmæs tɔɪˈdɛk tə mi/

noun, plural mastoidectomies. Surgery.
the removal of part of a , usually for draining an infection.
noun (pl) -mies
surgical removal of the mastoid process

mastoidectomy mas·toid·ec·to·my (mās’toi-děk’tə-mē)
Surgical removal of mastoid sinuses or part or all of the mastoid process.


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  • Mastoid emissary vein

    mastoid emissary vein n. A vein that connects the sigmoid sinus with the occipital vein or with one of the tributaries of the outer jugular vein by way of the mastoid foramen.

  • Mastoideocentesis

    mastoideocentesis mas·toi·de·o·cen·te·sis (mās-toi’dē-ō-sěn-tē’sĭs) n. Surgical puncture of the mastoid sinuses and the mastoid antrum.

  • Mastoid foramen

    mastoid foramen n. An opening at the rear of the mastoid process, transmitting a small artery to the dura mater and an emissary vein to the sigmoid sinus.

  • Mastoiditis

    [mas-toi-dahy-tis] /ˌmæs tɔɪˈdaɪ tɪs/ noun, Pathology. 1. inflammation of the . /ˌmæstɔɪˈdaɪtɪs/ noun 1. inflammation of the mastoid process mastoiditis mas·toid·i·tis (mās’toi-dī’tĭs) n. Inflammation of the mastoid process and mastoid sinuses. mastoiditis (mās’toid-ī’tĭs) Inflammation of the mastoid process, usually resulting from an acute infection of the middle ear.

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