Distal tear of adductor longus
Sudden pain in right thigh while being tackled in soccer 20 years prior, followed by an ill defined mass in medial thigh that moves with contraction
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In the case above do note the absence of the muscle bulk in its expected medial location (red) as opposed to the normal left side muscle(yellow). Also note the muscle is retracted ans bunched up probably causing the "pseudomass" the patient felt.
The absence of edema is consistent with a chronic history.
This case represents a typical distal , complete adductor longus tear on right side. the history is typical as well and is seen in athletes who do strenous activity without sport specific pre conditioning.
the adductor longus is one of the most commonly injured muscles in the thigh, it originates from the pubic symphysis and has a large insertion into the femoral shaft. on axial images it is recognised as being the "medial wall" of the subsartorial canal which contains the superficial femoral artery and vein
- Armfield DR, Kim DH, Towers JD et-al. Sports-related muscle injury in the lower extremity. Clin Sports Med. 2006;25 (4): 803-42. doi:10.1016/j.csm.2006.06.011 - Pubmed citation