The Ultrasound pattern sum score – UPSS. A new method to differentiate acute and subacute neuropathies using ultrasound of the peripheral nerves

Highlights • The recently described ultrasound findings in several neuropathies of heterogeneous origin make classification with pattern analysis necessary. • The ultrasound pattern sum score (UPSS) and its sub-scores UPS-A, -B and -C enable a differentiation of several acute and subacute axonal and demyelinating neuropathies. • Enlarged cervical nerve roots and/or the vagus without or with only slight enlargement of the peripheral nerves enable a differentiation from GBS and subacute onset CIDP.