Riedel lobe
Citation, DOI, disclosures and article data
At the time the article was created Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosuresAt the time the article was last revised Ammar Ashraf had no financial relationships to ineligible companies to disclose.
View Ammar Ashraf's current disclosures- Riedel's lobe
Riedel lobe is a common anatomical variant of the liver to be aware of because it can simulate a mass. Its misidentification as a pathologic abdominal mass has led to surgery. Pathology can also occur within it (e.g. malignancy or even torsion) and cause atypical hepatic symptoms low in the pelvis 1,2.
On this page:
Terminology
Some feel that the term Riedel lobe should be abandoned as it is not an accessory lobe but rather a variant of appearance of the right lobe.
Epidemiology
Riedel lobe has an incidence of ~17.5% (range 3.3-31%) and is more frequently found in females (M:F = 1:3) 2,3.
Gross anatomy
Riedel lobe is a tongue-like, inferior projection of the right lobe of the liver beyond the level of the most inferior costal cartilage on cross-sectional images 1. It is not considered a true accessory lobe of the liver but an anatomical variant of the right lobe of the liver 3.
ADVERTISEMENT: Supporters see fewer/no ads
Differential diagnosis
History and etymology
It was originally reported in 1888 by the German surgeon, Bernhard Moritz Carl Ludwig Riedel (1849-1916) 4 in seven female patients who had palpable masses in the right hypochondrium that were subsequently confirmed to be Riedel lobes at surgery 2.
See also
References
- 1. Kudo M. Riedel's lobe of the liver and its clinical implication. Intern. Med. 2000;39 (2): 87-8. Intern. Med. (link) - Pubmed citation
- 2. Gillard JH, Patel MC, Abrahams PH, et al. Riedel's lobe of the liver: fact or fiction? Clin Anat 1998; 11(1):47-9.
- 3. Yano K, Ohtsubo M, Mizota T et-al. Riedel's lobe of the liver evaluated by multiple imaging modalities. Intern. Med. 2000;39 (2): 136-8. Pubmed citation
- 4. Anton Sebastian. A Dictionary of the History of Medicine. (1999) ISBN: 9781850700210
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
-
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
-
female reproductive system
- vulva
- vagina
- uterus
- adnexa
- Fallopian tubes
- ovaries
- broad ligament (mnemonic)
- variant anatomy
- embryology
- blood supply of the abdomen and pelvis
- arteries
-
abdominal aorta
- inferior phrenic artery
- coeliac 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
- umbilical artery
- superior vesical artery
- obturator artery
- vaginal artery
- inferior vesical artery
- uterine artery
- middle rectal artery
-
internal pudendal artery
- inferior rectal artery
-
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
-
abdominal aorta
- portal venous system
- veins
- anastomoses
- arterioarterial anastomoses
- portal-systemic venous collateral pathways
- watershed areas
- arteries
- lymphatics
- innervation of the abdomen and pelvis
- thoracic splanchnic nerves
- 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
- autonomic ganglia and plexuses
Unable to process the form. Check for errors and try again.