Table 1.

Measurement locations for the ultrasound pattern sum score (UPSS)

UPSA		UPSB		UPSB
Median nerve	Mid-UA Elbow* Mid-FA	Cervical root 5	After leaving processus transversus	Superficial radial nerve	Frohse arcade
Ulnar nerve	Mid-UA Mid-FA	Cervical root 6	After leaving processus transversus	Superficial fibular nerve	Distal lateral lower limb
Tibial nerve	Popliteal ankle	Vagus nerve	Trigonum iugulare	Sural nerve	Distal calf next to SSV
Fibular nerve	Popliteal

UPSS/A/B/C = ultrasound pattern sum score A/B/C; Mid = middle; UA = upper arm; FA = forearm; SSV = small saphenous vein

*Before entering the pronator muscle. Enlargement > 100% of normal reference value (according to 14 or 12 if you use my reference list) is scored with 1 point, in UPSA enlargement > 150% is scored with 2 points