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Subacromial impingement by a lipoma arborescens.

Mohamed Elamin¹, Venkatramana Yeluri¹, Hisham Khatir¹

¹Department of Orthopaedics, Mayo University Hospital, Castlebar, Co. Mayo, F23 H529, Ireland.

|March 11, 2021

Summary

Subacromial lipoma arborescens is a rare cause of shoulder pain. Arthroscopic synovectomy effectively treated this unusual case of subacromial impingement syndrome when conservative methods failed.

Keywords:

Lipoma Lipoma arborescens MRI Shoulder impingement

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Area of Science:

Orthopedic Surgery
Musculoskeletal Disorders
Diagnostic Imaging

Background:

Subacromial impingement syndrome (SIS) is a common cause of shoulder pain, often necessitating a thorough diagnostic approach to rule out rare pathologies.
Subacromial lipoma arborescens is an uncommon benign lipomatous proliferation of the synovium, rarely associated with SIS.

Observation:

This report details an unusual case of SIS caused by subacromial lipoma arborescens.
Histopathologic and radiological findings indicative of this rare condition are discussed.
Conservative management failed to alleviate the patient's symptoms.

Findings:

Arthroscopic synovectomy was performed due to the failure of conservative treatment.
The patient experienced complete symptom resolution following the surgical intervention.

Implications:

This case highlights the importance of considering rare diagnoses in persistent SIS.
Surgical intervention, such as arthroscopic synovectomy, can be a successful treatment for SIS secondary to subacromial lipoma arborescens.
Long-term symptom relief is achievable with appropriate management of this rare condition.