Number of patients with two distinct ultrasound findings: one combining a hyperechogenic substantia nigra (SN) on at least one side with a regular echogenic lentiform nucleus (LN) on both sides and the other combining a hyperechogenic LN on one or both sides with a moderate or low echogenic SN. The first combination together with the clinical finding of “parkinsonism” reliably predicted IPD, whereas the second combination was indicative of an atypical parkinsonian syndrome
Echo pattern of the SN and the LN | No of patients | Positive predictive value | |
---|---|---|---|
With Parkinson’s disease | With atypical parkinsonian syndromes | ||
Hyperechogenic SN combined with regular echogenic LN | 58 | 6 | 0.91 |
Hyperechogenic LN combined with moderate echogenic SN at best | 1 | 28 | 0.96 |