Table 4.

Anatomic characteristics of TOS patients found at surgery and the outcome.

Anatomic Characteristics	Number	%	Outcome Excellent or Good %
Scalenus muscle	n = 88
normal	12	14	83
large	20	23	50
tendinous	38	43	71
tight posterior fascia	18	20	78
First rib-clavicle room	n = 78
wide	58	74	69
somewhat narrowed	17	22	65
narrow	3	4	100
Estimated plexus compression	n = 79
obvious	71	90	72
probable	8	10	63