SonoElastography of Median Nerve in Rheumatoid Arthritis

Inclusion Criteria: * All patients diagnosed with RA and ruling out CTS by clinical evaluation that included Phalen's test, a manual muscle test of the abductor's muscle, and a search for Tinel-like signs and thenar muscle atrophy. Controls - Age- and sex- matched cases without RA undergoing US for causes unrelated to RA or CTS. The criteria for RA were adopted from The American Rheumatism Association (1987) for the classification of RA. Exclusion Criteria: * History of a condition other than RA that could cause CTS (e.g., diabetes mellitus, acute trauma, pregnancy ,hypothyroidism, hyperthyroidism, connective tissue disease)History of surgery for a wrist or hand fracture. * History of other systemic neurological disorders or radiculopathy Bifid median nerve or any mass lesion identified on US examination Pregnant patients were excluded.