High origin of anterior tibial artery
Possible medial meniscal tear.
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A high origin of anterior tibial artery is noted. The artery is seen coursing anterior to the popliteal muscle belly, lying in close relation to the posterior tibial cortex.
An incidental ganglion cyst is noted in between the proximal tibia and fibula posteriorly, possibly arising from the proximal tibio-fibular joint.
The popliteal artery usually bifurcates into tibiperoneal trunk and anterior tibial artery at the lower border of popliteus muscle.
A high origin of anterior tibial artery is when the popliteal artery branches above the superior border of popliteus muscle. The anterior tibial artery can then either course posterior or anterior to the popliteus muscle belly. A course anterior to the popliteus muscle belly is of particular concern in knee surgeries where there is extension of osteotomy to the posterior tibial cortex, such as total knee replacements and high tibia osteotomies.
Knowledge of this anatomical variation is important to avoid injury to these vessels.
- Tindall AJ1, Shetty AA, James KD, Middleton A, Fernando KW. Prevalence and surgical significance of a high-origin anterior tibial artery.