Uniparental Disomy

A condition characterized by the inheritance of a chromosome pair from one parent and no chromosomal copies from the other parent. It results in developmental abnormalities or rare recessive disorders. Examples of uniparental disomy include the Prader-Willi syndrome and Angelman syndrome. (NCI Thesaurus)

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Union

A set containing all and only the members of two or more given sets.

Unintentional Material Aspiration

Accidental inhalation of a foreign material into the lungs.

Unintended System Motion Medical Device Problem

Issue associated with any motion of the system or components that was not initiated by the user.

Unintended Pregnancy

A pregnancy that was not desired or was timed incorrectly at the time that the conception occurred.

Unintended Movement Medical Device Problem

Movement of a medical device to an unintended location within the body.

Unintended Film Cartridge Ejection Medical Device Problem

Issue associated with unexpected discharge of device from expected location - includes but not limited to devices such as clip appliers, film…