Chronic muscle and tendon injuries to the groin are common sports inju
ries. The symptoms of groin injuries are often uncharacteristic which
can result in a delay in the correct and specific diagnosis being reac
hed. The most common injury is the overuse strain resulting in chronic
tendinitis of the adductor muscle/tendon units, especially the adduct
or longus. The rectus femoris and rectus abdominous muscles and tendon
s are also commonly affected. Computed tomography, magnetic resonance
imaging and ultrasonography have been widely adopted to diagnose muscl
e/tendon injuries to the groin. Ultrasonography has been shown to be a
ccurate and sensitive in diagnosing tendon injuries in the groin regio
n, especially small partial ruptures of the muscle/tendon unit. Ultras
onography has the advantage of being fast, inexpensive and widely avai
lable. Normal findings are readily distinguished from pathological fin
dings providing valuable pre-operative information, such as location a
nd extent of the injury. The differential diagnoses are many and often
difficult to reach. The most commonly over-looked differential diagno
ses are chronic prostatitis and hernias. A multidisciplinary approach
is valuable in many cases. The recommended treatment is a well planned
and gradually increased rehabilitation programme during the first sta
ges. Surgery for acute injuries is rarely indicated. Surgery, for exam
ple tenotomy of the adductor longus, has given satisfactory results in
many athletes when nonsurgical treatment has failed.