Diagnosis of brachial plexus injury by surgery 25 There are two definitive surgical diagnoses, namely root avulsion (including pseudomeningocel) and rupture of root, trunk and cords. In our study, there are two types of root lesions: (1) Rooting when localized lesions are present at the exit site of the spinal cord, the patient with this type of lesion predominates (40.0%), (2) root rupture, subsequent root lesions up to the nerve stem location, 21.0%.