“…2,5,13,22,34,35,36 Multi-level localisation of SS in most studies ranges between 3% and 13%. 2,12,13,17,18,27,37,38 The greatest frequency of multi-segment involvement -68%, is reported in the study of Patzakis MJ et al, involving large numbers of patients on continuous intravenous therapy. 39 The period between the debut of disease to diagnosis varies between 1 and 6 months.…”