We studied the ultrasonographic (US) Features of the pes anserinus insersio
n (PA) and subcutaneous medial knee fat in patients clinically diagnosed of
pes anserinus tendino-bursitis (PATB) syndrome. Thirty seven consecutive p
atients with suspected PATB were clinically evaluated and their knees exami
ned using a 7.5 MHz linear probe. In twenty-three patients with unilateral
clinical PATB (group A) the painful knee was compared with their painless o
pposite knee. Six patients with bilateral clinical PATB (group B) were comp
ared with 6 healthy controls (group C). All patients were women with radiog
raphic knee osteoarthritis in 93% and body mass index > 27 in 75%. US pes a
nsermus tendinitis was found in one symptomatic knee and Fes anserinus burs
itis in two symptomatic knees and in one asymptomatic knee. No US signs of
panniculitis were found in patients and controls. In conclusion. patients d
iagnosed of PATB syndrome in rheumatology rarely have US tendinitis or burs
itis of the PA.