A gallery of normal anatomical variants for trainees revising for the First FRCR Anatomy exam
A normal variant is an atypical finding that is seen in a percentage of the population, which generally has no clinical significance, and is considered within the spectrum of normal findings. Scroll down to view images of normal anatomical variants. Click on an image to see a full larger version with arrows. Please note that this list is still incomplete. If you have any examples you would like to add to this page then please feel free to contribute!
Chest
Abdomen and pelvis
Musculoskeletal
Head and neck
Aortic origin of the common hepatic artery and splenic artery

SMA (superior mesenteric artery) origin of the right hepatic artery

Absent IVC (inferior vena cava) - arrows point to multiple venous collaterals

Absent IVC (inferior vena cava) - arrows point to prominent azygos and hemiazygos veins

Fetal origin of the PCA (posterior cerebral artery)

Contributors
Christopher Clarke
Lara Sammut
Karthik
Alan Naz
Laura Smith
Chloe Yang
Maryam Rahiminejad
Syed Ehsan Ullah
Josephine Weaver
Subash Thapa
Vinay Kumar Malik
Abanindu Thakur
Bipin Valchandji Daga
Milton E. Tobias
Oussama Aloulou
Emma Watura
Marco Jing-Woei Li
(would you like to see your name here? See below…)
Add to this collection of normal variants!
If you have any examples of normal anatomical variants not shown on this page (or shown with a different modality), then contribute using the form below! We review every submission and reply to every message. If your image is used and you decide to tell us your name, we will also give you credit on this site!