Unusual Case of an Arterial Thoracic Outlet Syndrome due to Srb Anomaly.

[thoracic outlet syndrome]

A thoracic outlet syndrome (TOS ) is caused by arterial or nervous obstruction because of skeletal or muscular anomalies and hypertrophies . Congenital rib anomalies occur with low incidences (0 .15 -0 .31 %), predominantly affect the right side and are normally diagnosed at a young age or remain asymptomatic throughout life . Here , we report on the unusual case of a 71 -year -old female patient with subacute ischemia of the left arm due to a TOS resulting from Srb anomaly , a very rare congenital rib anomaly .