Semilunar 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.
Related Radiopaedia 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
- endocrine system
- adrenal gland
- adrenal vessels
- chromaffin cells
- variants
- pancreas
- organs of Zuckerkandl
- adrenal gland
- urinary system
- kidney
- renal pelvis
- renal sinus
- avascular plane of Brodel
- variants
- number
- fusion
- location
- shape
- ureter
- urinary bladder
- urethra
- embryology
- kidney
- male reproductive system
- prostate
- seminal vesicles
- ejaculatory duct
- bulbourethral glands
- urethral glands of Littré
- spermatic cord (mnemonic)
- scrotum (mnemonic)
- penis
- female reproductive system
- vulva
- vagina
- uterus
- Fallopian tubes
- ovaries
- ovarian follicle
- dominant ovarian follicle
- primary follicle
- secondary follicle
- mature vesicular follicle
- corpus luteum
- corpus albicans
- cumulus oophorus
- ovarian follicle
- broad ligament (mnemonic)
- variant anatomy
- embryology
- blood supply of the abdomen and pelvis
- arteries
- abdominal aorta
- inferior phrenic artery
- celiac artery
- superior mesenteric artery
- middle suprarenal artery
- renal artery (variant anatomy)
- gonadal artery (ovarian artery | testicular artery)
- inferior mesenteric artery
- lumbar arteries
- median sacral artery
- common iliac artery
- external iliac artery
- internal iliac artery (mnemonic)
- anterior division
- posterior division (mnemonic)
- variant anatomy
- abdominal aorta
- portal venous system
- veins
- anastomoses
- arterioarterial anastomoses
- portal-systemic venous collateral pathways
- watershed areas
- arteries
- lymphatics
- lymph node groups
- para-aortic lymph nodes
- preaortic lymph nodes
- portal and portocaval lymph nodes
- gastric lymph node stations
- peripancreatic lymph nodes
- common iliac lymph nodes
- external iliac lymph nodes
- internal iliac lymph nodes
- cisterna chyli
- lymph node groups
- innervation of the abdomen and pelvis
- lumbar plexus
- sacral plexus
- lumbosacral trunk
- sciatic nerve
- superior gluteal nerve
- inferior gluteal nerve
- nerve to piriformis
- perforating cutaneous nerve
- posterior femoral cutaneous nerve
- parasympathetic pelvic splanchnic nerves
- pudendal nerve
- nerve to quadratus femoris and inferior gemellus muscles
- nerve to internal obturator and superior gemellus muscles
