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Updated: Aug 25, 2026

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
Published on: February 10, 2015
Intramuscular ganglion arising from the acromioclavicular joint
Xavier Montet1, Maria Pia Zamorani-Bianchi, Amir Mehdizade
1Département de Radiologie, Division de Radiodiagnostic et Radiologic Interventionnelle, Hôpital Cantonal Universitaire de Genève, Rue Micheli-du-Crest 24, CH-1211 Geneva 14, Switzerland.
Abstract:
We report a case of a 80-year-old White woman presenting with a localized painless swelling in the upper parascapular region of the right shoulder. Ultrasound (US) showed a ganglion arising from the acromioclavicular joint (ACJ) and extending inside the trapezius muscle, together with a massive tear of the rotator cuff (RC). Magnetic resonance imaging (MRI) confirmed the US findings. Ganglia arising from the ACJ are rare and usually associated with massive RC tears. Their intramuscular extension, to the best of our knowledge, has never been reported in the radiological literature and can mimic a tumor.
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