Venn diagram highlighting the reason(s) for an invalid liver stiffness evaluation (LSE) in the biopsied patients only. 56/153 patients had an invalid LSE. Tables highlight the distribution of spread for each of the three reasons that the LSE was classed as invalid. Venn diagram highlighting the reason(s) for an invalid liver stiffness evaluation (LSE) in the biopsied patients only. 56/153 patients had an invalid LSE. Tables highlight the distribution of spread for each of the three reasons that the LSE was classed as invalid. M J Armstrong et al. Postgrad Med J 2013;89:685-692 Copyright © The Fellowship of Postgraduate Medicine. All rights reserved.