List of anatomical variations

Last updated February 16, 2025

Human anatomy

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See also Glossary of medicine Epithelia Anatomical terminology Index of anatomy articles Outline of human anatomy Cell types by origin
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This article lists anatomical variations that are not deemed inherently pathological.

Contents

Accessory features
Bones
Muscles
Vasculature
Glands
Organs
Other
Lacking features
Muscles 2
Other 2
Varying features
Bones 2
Muscles 3
Nerves
Vasculature 2
Other 3
See also

This list is incomplete; you can help by adding missing items. (December 2013)

Accessory features

Bones

Cervical rib
Fabella
Foramen tympanicum
Supracondylar process of the humerus
Sternal foramen
Stafne bone cavity
Episternal ossicles
Fossa navicularis magna
Transverse basilar fissure - or Saucer's fissure
Canalis basilaris medianus
Craniopharyngeal canal
Intermediate condylar canal
Condylus tertius
Arcus praebasiocipitalis
Foramen arcuale
Os odontoideum
Os acromiale
Ossiculum terminale (of dens)
Scapular foramina and tunnels

Muscles

Accessory soleus muscle
Axillary arch
Epitrochleoanconeus muscle - or anconeous epitrochlearis
Extensor medii proprius muscle
Extensor digitorum brevis manus muscle
Extensor indicis et medii communis muscle
Extensor pollicis et indicis communis muscle
Extensor carpi radialis tertius muscle - or extensor carpi radialis accessorius
Linburg-Comstock variation - or conjoint flexor pollicis longus and flexor digitorum profundus of the index
Sternalis muscle - or rectus thoracis
Psoas minor muscle
Palmaris profundus muscle
Pterygoideus proprius muscle
Styloauricularis muscle
Transversus nuchae muscle
Accessory popliteus muscle
Tensor fasciae suralis muscle
Sternoclavicularis anticus muscle
Gluteoperinealis muscle
Gantzer's muscle
Levator claviculae muscle
Chondrocoracoideus muscle

Vasculature

Double cystic artery
Median artery

Glands

Organs

Other

Lacking features

Muscles

Risorius
Psoas minor
Absence of the palmaris longus
Dividement of the piriformis
Missing or underdeveloped pectoralis major is called Poland's syndrome

Other

Varying features

Bones

Sesamoid bone of the second, third, fourth and fifth finger
Manubriosternal fusion
Sternoxiphoidal fusion

Muscles

Myocardial bridge

Nerves

Nerve of Mckenzie

Vasculature

Other

Anisocoria
Appendix
Crease of the upper eyelid – having either a "single" or "double" eyelid
- Epicanthic fold
Lateral arcuate ligament
Horseshoe kidney - also known as ren arcuatus

See also

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