Introduction: Sports-related recurrent injuries (microtrauma and trauma) of the apophyses are common in children and adolescents and could result in specific pathologies. One of them is the apophysitis or apophysiolysis of ischial tuberosity (Valtancoli or Kremser's disease) due to contraction of hamstrings, in sports with sudden accelerations and decelerations.
Case report: We present the case of a male athlete who complained of pain in the left buttock and difficulty walking after a 3months old reported trauma with pain and hematoma in his left thigh, during a kick with his contralateral leg. Due to a radiographic finding of a suspicious lesion near his left ischial tuberosity, an extensive investigation that included computed tomography, magnetic resonance imaging, bone scintigraphic scan, and blood analysis followed the diagnosis of apophysitis of the ischial tuberosity was determined and the proposed non-surgical treatment had satisfactory results.
Conclusion: The diagnosis of apophysitis of ischial tuberosity is usually delayed but has a good response to the appropriate treatment.
Keywords: Apophysitis; ischial tuberosity; teenage athlete.
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