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| Human anatomy |
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This article lists anatomical variations that are not deemed inherently pathological.
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
- 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
Glands
Organs
- Accessory spleen
- Azygos lobe of the lung
- Tracheal bronchus
- Hirsuties coronae glandis
- Cardiac bronchus
Other
- Accessory pancreatic duct
- Accessory nail of the fifth toe
- Darwin's tubercle
- Vein of foramen caecum
- Osborne's ligament
- Gastropancreatic ligament
- Diagonal ear lobe crease
- Preauricular sinus
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
- Appendix
- Agenesis of wisdom teeth
- Empty sella turcica
Varying features
Bones
- Sesamoid bone of the second, third, fourth and fifth finger
- Manubriosternal fusion
- Sternoxiphoidal fusion
Muscles
Nerves
Vasculature
- Artery of Percheron
- Variation of basilic vein
- Median artery
- Thyroid ima artery
- Superficial ulnar artery
- Marginal artery of the colon
- Persistent primitive olfactory artery
- Arc of Bühler
- Stapedial artery
- Hypoglossal artery
- Corona mortis
Other
- Anisocoria
- Appendix
- Crease of the upper eyelid – having either a "single" or "double" eyelid
- Lateral arcuate ligament
- Horseshoe kidney - also known as ren arcuatus