Semilunar line
Citation, DOI, disclosures and article data
Citation:
Hacking C, Foster T, Dimarelos V, et al. Semilunar line. Reference article, Radiopaedia.org (Accessed on 21 Feb 2025) https://doi.org/10.53347/rID-38680
Permalink:
rID:
38680
Article created:
Disclosures:
At the time the article was created Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Tom Foster had no financial relationships to ineligible companies to disclose.
View Tom Foster's current disclosures
Revisions:
7 times, by
5 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Linea semilunaris
- Spigelian line
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.
Incoming Links
Related articles: Anatomy: Abdominopelvic
- skeleton of the abdomen and pelvis
- muscles of the abdomen and pelvis
- spaces of the abdomen and pelvis
- anterior abdominal wall
- posterior abdominal wall
- abdominal cavity
- pelvic cavity
- perineum
- abdominal and pelvic viscera
- gastrointestinal tract
- spleen
- hepatobiliary system
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endocrine system
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adrenal gland
- adrenal vessels
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- pancreas
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adrenal gland
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urinary system
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kidney
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- renal sinus
- avascular plane of Brodel
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variants
- number
- fusion
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- ureter
- urinary bladder
- urethra
- embryology
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kidney
- male reproductive system
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female reproductive system
- vulva
- vagina
- uterus
- adnexa
- Fallopian tubes
- ovaries
- broad ligament (mnemonic)
- variant anatomy
- embryology
- blood supply of the abdomen and pelvis
- arteries
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abdominal aorta
- inferior phrenic artery
- celiac artery
- superior mesenteric artery
- middle suprarenal artery
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- gonadal artery (ovarian artery | testicular artery)
- inferior mesenteric artery
- lumbar arteries
- median sacral artery
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common iliac artery
- external iliac artery
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internal iliac artery (mnemonic)
- anterior division
- umbilical artery
- superior vesical artery
- obturator artery
- vaginal artery
- inferior vesical artery
- uterine artery
- middle rectal artery
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internal pudendal artery
- inferior rectal artery
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perineal artery
- posterior scrotal artery
- transverse perineal artery
- artery to the bulb
- deep artery of the penis/clitoris
- dorsal artery of the penis/clitoris
- inferior gluteal artery
- posterior division (mnemonic)
- variant anatomy
- anterior division
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abdominal aorta
- portal venous system
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- anastomoses
- arterioarterial anastomoses
- portal-systemic venous collateral pathways
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