Which of the following abbreviations is used for the right lower extremity?

The abbreviation used for the right lower extremity is indeed RLE. This term specifically identifies the right leg and foot as part of the body, making it clear which area is being referenced in medical documentation and communication.

The other abbreviations refer to different anatomical locations: RUE stands for right upper extremity, which indicates the upper limbs on the right side of the body; RUQ refers to the right upper quadrant, typically used in the context of abdominal anatomy; and RLQ stands for right lower quadrant, which is a portion of the abdomen. Each of these terms serves a distinct purpose in clinical practice, focusing on different regions, but RLE is the correct abbreviation for the right lower extremity.