costal margin

(redirected from Left Costal Margin)
Also found in: Acronyms.

costal margin

[TA]
that portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (that is, false) ribs.
Synonym(s): arcus costalis [TA], costal arch ☆ , arcus costarum

costal margin

The lower (abdominal) border of the front of the rib cage formed by the costal cartilages of ribs 7 to 10.
See also: margin
References in periodicals archive ?
Physical examination of the abdomen revealed diffuse voluntary guarding, left upper quadrant tenderness, and a palpable spleen approximately 4 cm below the left costal margin.
The spleen was palpable 3 cm below the left costal margin.