title: Retrospective study of sonographic findings in bone involvement associated with rotator cuff calcific tendinopathy: preliminary results of a case series.
abstract: OBJECTIVE
  The present study was aimed at investigating bone involvement secondary to rotator cuff calcific tendonitis at ultrasonography.
  
  
  METHODS
  Retrospective study of a case series. The authors reviewed shoulder ultrasonography reports of 141 patients diagnosed with rotator cuff calcific tendonitis, collected from the computer-based data records of their institution over a four-year period. Imaging findings were retrospectively and consensually analyzed by two experienced musculoskeletal radiologists looking for bone involvement associated with calcific tendonitis. Only the cases confirmed by computed tomography were considered for descriptive analysis.
  
  
  RESULTS
  Sonographic findings of calcific tendinopathy with bone involvement were observed in 7/141 (~ 5%) patients (mean age, 50.9 years; age range, 42-58 years; 42% female). Cortical bone erosion adjacent to tendon calcification was the most common finding, observed in 7/7 cases. Signs of intraosseous migration were found in 3/7 cases, and subcortical cysts in 2/7 cases. The findings were confirmed by computed tomography. Calcifications associated with bone abnormalities showed no acoustic shadowing at ultrasonography, favoring the hypothesis of resorption phase of the disease.
  
  
  CONCLUSIONS
  Preliminary results of the present study suggest that ultrasonography can identify bone abnormalities secondary to rotator cuff calcific tendinopathy, particularly the presence of cortical bone erosion.
authors.affiliation: PhD, Associate Professor of Radiology at Ribeirão Preto Medical School, University of São Paulo (FMRP-USP), Ribeirão Preto, SP, Brazil.
authors.forename: Marcello H
authors.initials: MH
authors.lastname: Nogueira-Barbosa
authors.affiliation: MD, Radiologist, Fellow at Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (HCFMRP-USP), Ribeirão Preto, SP, Brazil.
authors.forename: Everaldo
authors.initials: E
authors.lastname: Gregio-Junior
authors.affiliation: MD, Radiologist at Radiologia Especializada Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Mario Muller
authors.initials: MM
authors.lastname: Lorenzato
keywords: Calcific tendonitis; Computed tomography; Rotator cuff; Shoulder; Ultrasonography
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