title: CALCIFYING TENDINOPATHY: A LOCAL OR A SYSTEMIC CONDITION?
abstract: OBJECTIVE
  To evaluate the relationship between cases of calcifying tendinopathy of the shoulder and symptomatic metabolic diseases such as kidney stones, gallstones and gout.
  
  
  METHODS
  Calcifying tendinopathy of the shoulder was diagnosed in 63 patients between May 2007 and September 2011. All the patients were treated by the same orthopedic surgeon and were interviewed to gather the following data: age at diagnosis, sex, affected side, dominant side, body mass index (BMI), smoking status and previous histories of kidney stones, gallstones or gout. For statistical analysis, a control group of 63 patients with similar demographic characteristics was used.
  
  
  RESULTS
  Among the 63 patients with calcifying tendinopathy of the shoulder, 35 (56%) were male. The right side was affected in 38 patients (60%) and the average age was 48.2 years. Thirty-one patients (49%) had histories involving some of the metabolic diseases investigated: 20 patients (32%) reported kidney stones, six (9.5%) gallstones, four (6.3%) gout and one (2%) concurrent diagnoses of kidney stones and gout. In the control group, eleven patients (17%) had histories involving some of the metabolic diseases investigated: six patients (9.5%) reported kidney stones, four (6.3%) gallstones and one (1.6 %) gout.
  
  
  CONCLUSIONS
  The high frequency of nephrolithiasis in patients with calcifying tendinopathy of the shoulder in our study suggests that there are common mechanisms in the pathophysiology of these disorders. Better understanding of these diseases may enable improvement of diagnostics and treatments.
authors.affiliation: PhD in Orthopedics. Head of the Shoulder Group, Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Benno
authors.initials: B
authors.lastname: Ejnisman
authors.affiliation: Attending Physician at the Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Carlos Vicente
authors.initials: CV
authors.lastname: Andreoli
authors.affiliation: Attending Physician at the Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Gustavo Cará
authors.initials: GC
authors.lastname: Monteiro
authors.affiliation: Attending Physician at the Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Alberto de Castro
authors.initials: Ade C
authors.lastname: Pocchini
authors.affiliation: Attending Physician at the Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Carina
authors.initials: C
authors.lastname: Cohen
authors.affiliation: Trainee Physician in the Shoulder Group, Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Simone
authors.initials: S
authors.lastname: Tortato
authors.affiliation: Trainee Physician in the Shoulder Group, Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Marcelo Marques Khede
authors.initials: MM
authors.lastname: Franklin
authors.affiliation: Trainee Physician in the Shoulder Group, Sports Traumatology Center, Federal University of São Paulo (CETE/Unifesp), São Paulo, SP, Brazil.
authors.forename: Arthur Beber
authors.initials: AB
authors.lastname: Machado
authors.affiliation: Head of the Department of Orthopedics and Traumatology, Federal University of São Paulo (Unifesp), São Paulo, SP, Brazil.
authors.forename: Moisés
authors.initials: M
authors.lastname: Cohen
keywords: Metabolic Diseases; Nephrolithiasis; Tendinitis