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Sartorius Proximal Tendon

tendo musculi sartorii proximalis

The sartorius muscle arises via a narrow proximal tendon from the anterior superior iliac spine (ASIS), immediately anterior to the origin of the tensor fasciae latae. The tendon transitions rapidly to muscle within 1-2 cm of its ASIS origin. The ASIS origin of the sartorius is the attachment avulsed in sartorius apophyseal avulsion fractures in adolescent athletes. Distal to the ASIS, the long sartorius belly descends obliquely across the anterior thigh.

Region: Pelvis & Hip

Clinical Relevance

Clinical Notes

Sartorius ASIS avulsion fractures occur in kicking athletes and sprinters when sudden hip flexion with knee extension forcibly avulses the bony ASIS apophysis before physeal closure. Plain radiograph demonstrates the avulsed fragment displaced inferiorly and medially. Conservative treatment with rest and progressive rehabilitation is successful for most; surgical reattachment is required for significantly displaced fragments. The sartorius origin may also be involved in iliac crest apophyseal injuries from hip abductor pull.

Pathology

Common Injuries & Conditions

ASIS Avulsion Fracture (Sartorius)

Sudden explosive hip flexion in a young athlete avulses the sartorius origin from the ASIS apophysis, producing acute anterior hip pain and point tenderness at the ASIS with an avulsed bony fragment visible on AP pelvis radiograph, managed conservatively in most cases with crutches and graduated return to sport.