Q: What is Riedel's lobe of liver?
Answer: Riedel's lobe is an anatomic variation. It can easily deceive a clinician as hepatomegaly as it extends below the level of the umbilicus. It is a right-sided tail or tongue-like downward projection from the right lobe of the liver. It is a benign condition but should be watched for as 30 percent of the population may carry it.
Further reading with pictures can be obtained from the given reference below.
Savopoulos C, Kakaletsis N, Kaiafa G, Iliadis F, Kalogera-Fountzila A, Hatzitolios AI. Riedel's lobe of the liver: a case report. Medicine (Baltimore). 2015 Jan;94(3):e430. doi: 10.1097/MD.0000000000000430. PMID: 25621695; PMCID: PMC4602636.