Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Bones of the Upper Limb: Ulna

Bones of the Upper Limb: Ulna

The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...

Development of the Limb Synovial Joints

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...

Changes in the Appendicular Skeleton with Age

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...

Bones of the Upper Limb: Humerus

Bones of the Upper Limb: Humerus

The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Toxic epidermal necrolysis caused by etonogestrel implantation: A rare presentation.

JAAD case reports·2022

Same author

Correction of 4<sup>th</sup> and 5<sup>th</sup> metacarpal synostosis in a skeletally mature hand using de-rotational osteotomies.

Case reports in plastic surgery & hand surgery·2022

Same author

The Untold Story of the First Hand Transplant: Dedicated to the Memory of one of the Great Minds of the Ecuadorian Medical Community and the World.

Journal of reconstructive microsurgery·2018

Same author

Incidence of Cellulitis in Lower Extremity Burns: 6-Year Analysis.

Annals of plastic surgery·2018

Same author

Contemporary solutions for the treatment of facial nerve paralysis.

Plastic and reconstructive surgery·2015

Same author

Laser velocimetry with fluorescent dye-doped polystyrene microspheres.

Optics letters·2013

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome

Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome

Published on: May 26, 2023

Ulnar polydactyly with retrograde development and synostosis: case report.

Jeffrey R Ridha¹, Roger L Simpson

¹Division of Plastic & Reconstructive Surgery, Nassau University Medical Center, East Meadow, NY, USA. diogenic@yahoo.com

The Journal of Hand Surgery

|December 17, 2008

Summary

This summary is machine-generated.

This case study describes a rare instance of isolated unilateral ulnar polydactyly in a child. The extra digit was fused to the fifth metacarpal and grew at an unusual angle.

Related Experiment Videos

Last Updated: Jun 27, 2026

Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome

Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome

Published on: May 26, 2023

Area of Science:

Orthopedics
Pediatric Surgery
Clinical Case Reports

Background:

Ulnar polydactyly is a congenital anomaly affecting the little finger side of the hand.
Isolated cases, without other syndromic features, are less common.
Understanding variations in presentation is crucial for accurate diagnosis and management.

Observation:

A pediatric patient presented with an extra digit on the ulnar side of one hand.
This supernumerary digit was found to be fused to the fifth metacarpal bone.
The digit's orientation was retrograde, deviating from the normal hand axis.

Findings:

The case demonstrated isolated unilateral ulnar polydactyly, a rare congenital hand anomaly.
Fusion of the polydactylous digit to the fifth metacarpal presented a unique anatomical variation.
The retrograde development of the digit posed distinct clinical and surgical considerations.

Implications:

This case highlights the spectrum of ulnar polydactyly presentations.
Accurate anatomical description is vital for surgical planning and patient counseling.
Further research into the genetic and developmental factors of such anomalies is warranted.