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The subclavius posticus muscle: a factor in arterial, venous or brachial plexus compression?
K Akita1, K Ibukuro, K Yamaguchi
1Unit of Functional Anatomy, Graduate School, Tokyo Medical and Dental University, Japan. akita.Sana@tmd.ac.jp
Surgical and Radiologic Anatomy : SRA
|August 26, 2000
Summary
An aberrant subclavius posticus muscle was found in cadavers, potentially causing Paget-von Schrötter syndrome. This finding is crucial for diagnosing thoracic outlet syndrome, especially venous compression symptoms.
Area of Science:
- Anatomy
- Human Anatomy
- Surgical Anatomy
Background:
- Anatomical variations can impact neurovascular structures.
- The subclavius posticus muscle is a rare anatomical variant.
Purpose of the Study:
- To describe the anatomy and prevalence of the subclavius posticus muscle.
- To investigate the potential clinical implications of this aberrant muscle.
Main Methods:
- Cadaveric dissection (n=124 cadavers).
- Magnetic resonance (MR) imaging of the supraclavicular region in a living subject.
Main Results:
- The subclavius posticus muscle was identified in 4.8% of sides.
- The muscle originates from the first rib and inserts into the scapula.
- MR imaging suggests the muscle may cross the subclavian vein and brachial plexus.
Conclusions:
- The subclavius posticus muscle is a potential anatomical cause of Paget-von Schrötter syndrome.
- Awareness of this variant is important for patients with thoracic outlet syndrome and venous compression symptoms.