The objective of our study was to evaluate the quality EEs, with the aim of correcting our practices and improving their reliability. It is a retrospective study of all the EEs performed in the ACP of the CHU Mohamed Taher Mâamouri of Nabeul during two years (2016-2017). We evaluated the conditions of the EEs (State of the premises, equipment) and the different phases (pre-analytical, analytical and post-analytical). These were 497 EAs, which involved 22 sites (Thyroid (n=214;43.1%), Breast (n=106;21.3%), Ganglia (n=57;11.5%)...). EE response was delayed in 113 cases (22.7%) of which 76%...