Hilton-Jones et al reported modified criteria for the diagnosis of sporadic inclusion body myositis (IBM). This was reported at a workshop in London during June, 2008.
Parameters:
(1) duration of weakness in months
(2) age of the patient in years
(3) pattern of weakness in the upper and lower extremities
(3a) finger extension is weaker than shoulder abduction (associated with atrophy of the forearm muscles)
(3b) knee extrension is weaker than hip flexion (associated with atrophy of the quadriceps muscles)
