Related Experiment Video
Updated: Jun 16, 2026
09:17
Adult Mouse Digit Amputation and Regeneration: A Simple Model to Investigate Mammalian Blastema Formation and Intramembranous Ossification
Published on: July 12, 2019
Reconstruction of the hypoplastic thumb
1Loyola Department of Orthopaedic Surgery and Rehabilitation, Maywood, IL 60153, USA. tlight@lumc.edu
The Journal of Hand Surgery
|February 9, 2010
Summary
Thumb hypoplasia, a condition of diminished thumb size, requires surgical intervention. Treatment varies from index finger pollicization for severe cases to reconstructive procedures for less severe hypoplasia.
Area of Science:
- Orthopedics
- Hand Surgery
- Congenital Hand Anomalies
Background:
- Thumb hypoplasia presents with varied symptoms including small thumb size, joint instability, and muscle/tendon abnormalities.
- Severe cases involve carpometacarpal joint instability or complete thumb aplasia.
Purpose of the Study:
- To outline treatment strategies for thumb hypoplasia based on severity.
- To differentiate surgical approaches for severe versus less severe presentations.
Main Methods:
- Surgical reconstruction techniques are detailed for less severe thumb hypoplasia.
- Thumb ablation and index finger pollicization are presented as primary options for severe cases.
Main Results:
- Severe thumb hypoplasia and aplasia are effectively managed with thumb ablation and pollicization.
- Less severe hypoplasia can be addressed through soft tissue release, ligament reconstruction, and tendon/muscle transfers.
Conclusions:
- Treatment for thumb hypoplasia should be tailored to the specific severity of the condition.
- A combination of surgical techniques allows for functional reconstruction of hypoplastic thumbs.
Related Concept Videos
01:09Changes 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...
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...
01:15Bones 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...