• Daniel de Oliveira Gomes, Rafael Rocha Vidal, Bruno Figueiredo Foeppel, Danilo Fiorindo Faria, and Minori Saito.
• Department of Urology, Hospital Santa Marcelina, São Paulo, São Paulo, Brazil.
• Sao Paulo Med J. 2015 May 1; 133 (3): 187190187-90.

Context And ObjectiveTesticular torsion is a medical and urological emergency because it can lead to loss of the organ. The theory of seasonal testicular torsion occurrence is based on studies from institutions located in cold and temperate regions. The objective here was to determine whether cold weather is associated with higher incidence of testicular torsion in a tropical country, such as Brazil.Design And SettingRetrospective study, conducted in a tertiary and teaching hospital.MethodsPatients with acute testicular torsion confirmed by surgery between April 2006 and March 2011 were studied. Information on weather conditions at the time of symptom onset was collected.ResultsA total of 64 testicular torsion cases were identified. The months with the highest incidences of testicular torsion were June (16%), July (19%) and August (11%), which had the lowest mean temperatures, of 17.6 °C, 16.4 °C and 18.2 °C, respectively. Eleven percent of cases occurred during spring (October to December), 16% occurred in summer (January to March), 34% occurred in fall (April to June) and 39% occurred in winter (July to September). There was a significant association between the incidence of testicular torsion and the season (fall and winter), P < 0.001.ConclusionsTesticular torsion follows a seasonal association even in a tropical country, and is more frequent in the colder months of the year, namely fall and winter, when almost three-quarters of the cases occurred. These observations add further evidence that cold weather has an etiologic role in testicular torsion occurrence.

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