Myringotomy minor procedure. Those requiring myringotomy usually have an obstructed or dysfunctional eustachian tube that is unable to perform drainage or ventilation in its usual fashion. Before the invention of antibiotics, myringotomy without tube placement was also used as a major treatment of severe acute otitis media (middle ear infection). The words myringotomy, tympanotomy, tympanostomy, and "tympanocentesis" overlap in meaning. The first two are always synonymous, and the third is often used synonymously. The core idea with all of them is cutting a hole in the eardrum to allow fluid to pass through it. Sometimes a distinction is drawn between myringotomy/tympanotomy
Supernumerary body part considered to have lost much or all of their original function through evolution. These body parts can be classed as additional to the required functioning of the body. In human anatomy the vermiform appendix is sometimes classed as a vestigial remnant. Prosthesis is an artificial extension that replaces a body part, and cybernetics is the study of computer technology in relation to organisms which can include replacement or additional body parts. Body integrity identity disorder (BIID) is a psychiatric disorder in which a person thinks that they have one or more additional limbs than they should, despite having two arms