TABLE 1.

Detailed chart review of all patients included in this study. In the top column the symptoms, results, therapies and examinations considered in this study are listed.

Case number/ Age/Sex	Neurologic symptoms	Muscular/Sensory (M, S) symptoms	Affected side	Symptom duration	Previous surgery	Sonography	MR (3 Tesla)	Treatment
1/29y/F	Median nerve atrophy intrinsic muscles	M, S	bilateral	15 years	Unilateral (left) first rib and subsequent cervical rib resection	Stumpl rib C7, accessory ligament from tip to pleural dome, diversion and constriction C8; C7 riding on cervical rib tip, marked swelling C8	Yes	Surgical resection
2/35y/M	Ulnar distribution	M, S	right	2 years	Carpal tunnel syndrome on the right side and “trigger finger”	Stump rib C7, accessory ligament from tip to pleural dome, diversion and constriction C8, Th1; C7 riding on cervical rib tip, swelling C7, C8, Th1	Yes	Surgical resection
3/75y/M	Ulnar distribution	M, S	left	10 years	none	Stump rib C7, accessory ligament from the tip to the pleural dome, displacement and constriction of C8, riding of C7 on the rib	Yes	Conservative
4/26y/F	Median distribution	M, S	right	3 years	none	Staump rib C7, C6 root riding on edge tip, during head turn. Accessory ligament from the tip to the pleural dome	Yes	Conservative
5/33y/F	Median nerve territory, clinical diagnosis of carpal tunnel syndrome and ulnar neuropathy at the elbow	S	right	unknown	none	Stump rib on the right side with an accessory ligament to the pleural dome, compression, and displacement of C8, C7 riding on tip of the rib	Yes	Surgical resection
6/53y/F	Weakness of the left forearm, clumsiness of the hand, nuchal pain, paraesthesia in both hands, all fingers	M, S	left	10 years	none	Stump rib C7 with pseudarthrosis on the left, accessory ligament from tip to pleural dome, diversion and constriction C8	Yes	Surgical resection
7/56y/F	Diffuse pain radiating from the shoulder down the hand, territory not compatible with radicular or peripheral pattern	S	left	15 years	none	Stump rib on the left with riding and constriction of C8. Accessory ligament to the pleural dome.	Yes	Conservative
8/50y/F	Ulnar distribution, clinically suspected Loge de Guyon syndrome	M, S	bilateral	10 years	none	Stump rib C7 on both sides, only right side symptomatic, accessory ligament to the pleural dome, compression, and displacement of C8	Yes	Surgical resection
9/55y/F	Clinically atypical carpal tunnel syndrome on the right side	M, S	right	8 years	none	Stump rib C7 on the right side, accessory ligament to the pleural dome	Yes	Surgical resection
10/45y/F	Unclear dysesthesia of the hand, nuchal pain	M,S	right	3 years	none	Stump rib C7 on both sides. No direct contact to the nerves	Yes	Conservative
11/45y/M	Diffuse pain in the right hand	M	right	unknown	none	Stump rib C7 on the right side, accessory ligament to the pleural dome	Yes	Conservative
12/74y/F	C8 muscle weakness	M	right	unknown	none	Stump rib C7, accessory ligament from tip to pleural dome following medial border of scalenus medius muscle, indentation C8/Th1	No	Surgical resection
13/43y/F	Adductor pollicis brevis atrophy, dysesthesia C8/Th1	M,S	right	2 years	none	Stump rib C7, accessory ligament from tip to pleural dome following medial border of scalenus medius muscle, thickened inferior trunk C8/Th1	No	Surgical resection
14/54y/F	Atrophy of intrinsic hand muscles and abductor pollicis brevis muscle, pain C8/Th1, Raynaud syndrome	M,S	right	unknown	none	Stump rib C7, accessory ligament from tip to pleural dome following medial border of scalenus medius muscle, thickened inferior trunk C8/Th1	No	Surgical resection
15/25/F	Acute scapula alata with atrophy of the serratus anterior muscle. Hypesthesia of the thumb and forefinger.	M, S	right	one week	none	Stump rib C7 on both sides, accessory ligament from tip to pleural dome thickening and dispülacement C7/C8	Yes	Surgical resection
16/49y/F	Atrophy of intrinsic hand muscles and abductor pollicis brevis muscle, arm pain	M,S	right	15 y	none	Stump rib C7, accessory ligament from tip to pleural dome following medial border of scalenus medius muscle, thickened inferior trunk C8/Th1	No	Surgical resection