Six hundred and eighty-four primary breast cancers from the Internatio
nal (Ludwig) Breast Cancer Study Group (IBCSG) were studied for Helix
pomatia lectin (HPA) binding. There was a weak correlation between lym
ph node-positive and HPA positive (P = 0.04). In our series there was
a large advantage in disease-free survival (DFS) and overall survival
(OS) for node-negative patients (P < 0.0001 DFS and OS). However, ther
e was no such advantage for HPA-negative patients (P = 0.23 DFS and P
= 0.32 OS). We conclude that in this randomised patient group HPA is o
f no clinical predictive value.