With great interest we have read the article of Sène et al. (1) in which ectopic germinal centres (GCs) in labial gland biopsies of primary Sjögren syndrome (pSS) patients were found predictive for Non-Hodgkin's lymphoma (NHL) development later in the disease. In the univariate analysis the presence of GCs in these biopsies was not significantly different between pSS patients that developed NHL or pSS patients that did not. This article is protected by copyright. All rights reserved.