HistoBase^TM is PathData’s relational historical database. Selective search and retrieval functions permit fast and elegant evaluation of both neoplastic and non-neoplastic findings across studies and species, including control and treatment related data. A set of freely combinable parameter options provide data tables by maximum/minimum values and standard deviation for comparison with actual study data, as well as fast data retrieval following specific queries by animals and organs. Compatibility of HistoBase^TM data with PathData® versions is always retained.