Tracheotomy (US: /ˌtreɪkiˈɒtəmi/ tray-kee-AW-tə-mee) or tracheostomy, is a surgical procedure which consists of making an incision on the anterior aspect of the neck and opening a direct airway through an incision in the trachea (windpipe).

Thymus transplantation is a form of organ transplantation where the thymus is moved from one body to another.

Embolectomy is the emergency surgical removal of emboli which are blocking blood circulation.

A thyroidectomy is an operation that involves the surgical removal of all or part of the thyroid gland.