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Accessory Bones of the Elbow

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Description

Identification of accessory ossicles: A, Anterior supratrochleare; B, posterior supratrochleare; C, radial epicondyle; D, of the olecranon; and E, medial epicondyle[1]
Accessory bones of the elbow[2]
Os Sesamoideum Tricipitale[3]
Os supratrochleare dorsale.[4]

Name

  • Accessory Bones of the Elbow
  • Accessory Ossicles of the Elbow

General

  • Rare variants of the bony elbow
  • Some are failure of ossification centers to fuse with the rest of the humerus or ulna
  • Some are sesamoid bones
  • Overall prevalence is 0.77% according to Kunc et al[2]

Ossicles

Os Supratrochleare Anterius

  • Accessory bone of the elbow which presents in the anterior coronoid fossa of the humerus

Os Supratrochleare Posterius

  • Accessory ossicle of the elbow located in the olecranon fossa of the humerus

Os Subepicondylare Laterale

  • Also called: paratrochlear bone
  • Sits just below the lateral epicondyle of the humerus

Os Subepicondylare Mediale

  • Found just distal to the medial epicondyle of the humerus

Os Sesamoideum Tricipitale

  • Also called: patella cubiti
  • Presents as a sesamoid bone within the distal triceps brachii tendon

Os Sesamoideum Brachiale

  • Needs to be updated

Supratrochlear Foramen

  • Small hole located in the trochlea of the humerus

Clinical Significance

  • Needs to be updated

See Also

References

  1. ↑ Image courtesy of musculoskeletalkey.com
  2. ↑ 2.0 2.1 Kunc, Vojtěch, et al. "Accessory bones of the elbow: prevalence, localization and modified classification." Journal of Anatomy 237.4 (2020): 618-622.
  3. ↑ Case courtesy of Hector Rivera-Melo, Radiopaedia.org, rID: 56558
  4. ↑ Case courtesy of Muneesh Sharma, Radiopaedia.org, rID: 10327
Created by:
John Kiel on 29 April 2025 16:06:47
Authors:
Last edited:
29 April 2025 17:37:40
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