title: Ultrasound of the pectoralis major muscle after reverse shoulder arthroplasty: a case report.
abstract: Only a few reports exist in the literature for sonographic assessment of the pectoralis major muscle. Presented is a case of pectoralis major muscle atrophy as a cause of persistent internal rotation weakness diagnosed via ultrasound in a patient with multiple previous surgeries and contraindication to magnetic resonance imaging because of a shoulder implant. This patient's physical examination suggested an abnormal contour of the pectoralis major muscle on contraction, so he was referred for diagnostic ultrasound. The ultrasound was key to guiding the management of this patient because surgical repair of a torn pectoralis major muscle was planned if this was found. No pectoralis major tear or rupture was seen on ultrasound, but there was evidence of pectoralis major muscle atrophy. Accordingly, surgery was avoided and the patient was able to continue with his physical therapy program.
authors.affiliation: From the Department of Physical Medicine and Rehabilitation, Harvard Medical School/Spaulding Rehabilitation Hospital, Charlestown (ALM); Department of Radiology, New England Baptist Hospital, Boston (JSN); Department of Orthopaedics, Massachusetts General Hospital, Boston (JJPW); and Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee (NBJ).
authors.forename: Angelie L
authors.initials: AL
authors.lastname: Mascarinas
authors.forename: Joel S
authors.initials: JS
authors.lastname: Newman
authors.forename: Jon J P
authors.initials: JJ
authors.lastname: Warner
authors.forename: Nitin B
authors.initials: NB
authors.lastname: Jain
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement / Q000009:adverse effects* / Q000379:methods; D006801:Humans; D008297:Male; D009133:Muscular Atrophy / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D010369:Pectoralis Muscles / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D026741:Physical Therapy Modalities; D016059:Range of Motion, Articular / Q000502:physiology; D017006:Rotator Cuff / Q000000981:diagnostic imaging* / Q000601:surgery; D000070636:Rotator Cuff Injuries; D012421:Rupture / Q000000981:diagnostic imaging / Q000601:surgery; D014463:Ultrasonography