Related Experiment Video
Updated: May 3, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Fibrous deltoid muscle in Vietnamese children
1Pediatric Orthopaedic Department, National Hospital of Pediatrics of Vietnam, Vietnam. ngocyenhung@gmail.com
Insights
Surgical treatment for fibrous deltoid muscle in children yields good clinical outcomes. Type IV surgery, involving distal release and posterior portion transfer, significantly reduced shoulder deformities.
Area of Science:
- Orthopedic Surgery
- Pediatric Orthopedics
- Musculoskeletal Disorders
Background:
- Fibrous deltoid muscle in children can lead to functional limitations.
- Surgical intervention is considered for improving clinical and functional results.
- Evaluating different surgical techniques is crucial for optimal patient outcomes.
Purpose of the Study:
- To assess the clinical and functional outcomes of surgical treatments for fibrous deltoid muscle in pediatric patients.
- To compare the effectiveness of four distinct surgical techniques.
- To identify surgical approaches that minimize postoperative complications.
Main Methods:
- Retrospective analysis of 105 pediatric patients (182 shoulders) aged over 5 years.
- Surgical techniques included proximal release, distal release, lengthening, and combined release/transfer of the deltoid muscle.
- Clinical and functional results were evaluated post-surgery with an average follow-up of 3 years and 2 months.
Main Results:
- Overall, 95.6% of shoulders showed good clinical results.
- Type IV surgery (distal release and posterior portion transfer) demonstrated the lowest incidence of stairstep deformity (4.3%).
- 98.6% of patients undergoing Type IV surgery achieved satisfactory outcomes.
Conclusions:
- Surgical treatment for fibrous deltoid muscle in children generally provides good clinical and functional results.
- The Type IV surgical technique is effective in reducing postoperative deformities like stairstep deformity.
- This study supports the use of Type IV surgery for improved shoulder contour and function in pediatric patients.
Abstract:
To evaluate the clinical and functional results of surgical treatment for fibrous deltoid muscle in children, a retrospective study has been undertaken. The data were analysed on 105 patients with age over 5 years (182 shoulders) from August 1994 to December 2004. Surgical techniques performed by the author were divided into four types: (i) type I, proximal release of intermediate portion of deltoid muscle; (ii) type II, distal release of intermediate portion of deltoid muscle; (iii) type III, lengthening of intermediate portion of deltoid muscle; and (iv) type IV, distal release of intermediate portion of deltoid muscle and transfer of posterior portion of deltoid muscle to fill the gap. Accordingly, clinical and functional results were compared among four groups. The average duration of follow-up was 3 years and 2 months (range, 2-9 years and 5 months). Overall, in 174 shoulders (95.6%, 99 patients), we had a good clinical result; in two shoulders (1.1%, two patients) a fair result; and poor result in only six shoulders (3.3%, four patients). Postoperative formation of stairstep deformity or loss of roundness of the lateral aspect of shoulder in type I: 46.2%; type II: 30.3%; type III: 16.7%; type IV: 4.3%. Generally, surgical treatment gave good results. Technique type IV had reduced rate of stairstep deformity or loss of the natural roundness of the lateral aspect of the shoulder muscle. Sixty-eight patients (98.6%) in this group achieved a satisfactory outcome.
Related Concept Videos
Naming Skeletal Muscles
The key factors used in naming muscles include:
Muscles that Move the Head
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
Muscles of the Shoulder
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Muscles that Move the Arm
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
Muscles that Move the Forearm
Forearm Flexors
The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...
Muscles that Move the Thigh
Three other significant muscles are the gluteus maximus, gluteus medius, and gluteus minimus. The gluteus maximus originates from the posterior surface of the ilium, sacrum, and coccyx, and the thoracolumbar...

