PSIP1 and lobular neoplasia: Given that the titer of anti-dsDNA antibodies had the highest accuracy in discriminating between PLN and MLN patients (16), we further analyzed the distribution of LN class in the 17 anti-dsDNA antibody-negative and anti-DFS70 antibody-positive LN patients, and we found that 88.2% (15/17) anti-dsDNA antibody-negative and anti-DFS70 antibody-positive LN was PLN patients, while 11.8% (2/17) was MLN patients.