Display of the clinico-pathological correlation of three cases of adenomatoid tumour (AT) of the male reproductive organs. From the anatomo-pathological point of view we observe the architectural patterns traditionally described, and discuss their controversial mesothelial origin. From the clinical point of view we highlight the benignancy of the process, often underdiagnosed, as well as its association to post-inflammatory hydrocele in one case. Such coincidence could favour the assumption that inflammation plays a decisive role on the production mechanism.