Semilunar line

Dr Henry Knipe and Dr Craig Hacking et al.

The semilunar line, linea semilunaris or Spigelian line is a bilateral vertical curved line in the anterior abdominal wall where the layers of the rectus sheath fuse lateral to the rectus abdominis muscle and medial to the oblique muscles.

Related pathology

It is the site of a Spigelian hernia.

Abdominal and pelvic anatomy
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Article information

rID: 38680
Section: Anatomy
Tags: cases, refs
Synonyms or Alternate Spellings:
  • Linea semilunaris
  • Spigelian line

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Cases and figures

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