title: Bilateral bony fusion around the supraspinatus muscle inducing muscle hypoplasia and shoulder pain.
abstract: We describe the case of a 30-year-old man who developed chronic bilateral shoulder pain that relapsed and remitted over the course of 1 year. The patient was diagnosed with congenital shoulder fusion anomalies. The right shoulder showed anomalous accessory articulation between the distal third of the clavicle and the acromion along with normal articulation of the shoulder on CT. At the left shoulder, bony fusions were present between the distal portion of the clavicle, the acromion, and the coracoid process, and between the coracoid process, upper portion of the glenoid, and upper body of the scapula, which formed a bony canal and was responsible for hypoplasia of the supraspinatus muscle on CT and MRI. To our knowledge, this is the first description of such congenital shoulder anomalies with extreme bony fusion and is an illustrative example of how imaging may be used to differentiate fusion from other congenital abnormalities of the shoulder to aid diagnosis.
authors.affiliation: Department of Radiology, Kyung Hee University Hospital at Gangdong , 892, Dongnam-ro, Gangdong-gu, Seoul, Republic of Korea.
authors.forename: YeNa
authors.initials: Y
authors.lastname: Son
authors.affiliation: Department of Radiology, Kyung Hee University Hospital , 23 Kyunghee-daero, Dongdaemun-gu, Seoul, Republic of Korea. t2star@naver.com.
authors.forename: Kyung Nam
authors.initials: KN
authors.lastname: Ryu
authors.affiliation: Department of Radiology, Kyung Hee University Hospital at Gangdong , 892, Dongnam-ro, Gangdong-gu, Seoul, Republic of Korea.
authors.forename: Wook
authors.initials: W
authors.lastname: Jin
authors.affiliation: Department of Radiology, Kyung Hee University Hospital , 23 Kyunghee-daero, Dongdaemun-gu, Seoul, Republic of Korea.
authors.forename: Ji Seon
authors.initials: JS
authors.lastname: Park
authors.affiliation: Department of Radiology, Kyung Hee University Hospital at Gangdong , 892, Dongnam-ro, Gangdong-gu, Seoul, Republic of Korea.
authors.forename: So Young
authors.initials: SY
authors.lastname: Park
mesh_terms: D000174:Acromion / Q000002:abnormalities / Q000000981:diagnostic imaging; D000328:Adult; D002968:Clavicle / Q000002:abnormalities / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging*; D012785:Shoulder Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D020069:Shoulder Pain / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed
keywords: CT; Clavicle; Congenital anomaly; MRI; Scapula; Shoulder; Supraspinatus muscle