title: Sonoelastography for the evaluation of an axillary schwannoma in a case of quadrilateral space syndrome.
abstract: Entrapment axillary neuropathy at the quadrilateral space, also known as quadrilateral space syndrome (QSS), is a rare cause of posterior shoulder pain. We present a case of an axillary schwannoma causing QSS evaluated by both conventional ultrasound and sonoelastography. The application of sonoelastography is useful in elaborating the elastic feature of a soft tissue tumor, which provides additional information to conventional ultrasound regarding its growth pattern, and can help the differential diagnosis and guide the management.
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Chen-Yu
authors.initials: CY
authors.lastname: Hung
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, BeiHu Branch and National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan. Electronic address: pattap@pchome.com.tw.
authors.forename: Ke-Vin
authors.initials: KV
authors.lastname: Chang
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Pei-Tsen
authors.initials: PT
authors.lastname: Chen
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Yu-Tsun
authors.initials: YT
authors.lastname: Ho
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, BeiHu Branch and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Der-Sheng
authors.initials: DS
authors.lastname: Han
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Wen-Shiang
authors.initials: WS
authors.lastname: Chen
authors.affiliation: Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Tyng-Guey
authors.initials: TG
authors.lastname: Wang
mesh_terms: D001365:Axilla; D003937:Diagnosis, Differential; D054459:Elasticity Imaging Techniques; D005260:Female; D006801:Humans; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000000981:diagnostic imaging* / Q000209:etiology*; D009442:Neurilemmoma / Q000150:complications* / Q000000981:diagnostic imaging*; D020069:Shoulder Pain / Q000000981:diagnostic imaging* / Q000209:etiology*
keywords: Axillary schwannoma; Quadrilateral space syndrome; Sonoelastography; Ultrasound