Monarch's Phenogrid  phenotype comparison tool is now available for phenotype profile comparisons on the International Mouse Phenotype Consortium ( mousephenotype.org ) site. Visitors to the IMPC site can find Phenogrid comparisons on disease pages such as the entry for  Pfeiffer Syndrome .  Under the mouse models, you will see a plus ("+") symbol at the end of each row: Clicking on that plus sign will reveal the Phenogrid widget showing mouse strains  with phenotype profiles similar to those of the gene in question. For Pfeiffer, the grid will reveal multiple variants of Fgfr1, illustrating differences in phenotypes seen across these strains.  Mousing over the cells will show the details of the match between the given phenotype and the model: Mousing over the model label will lead to the display of a dialog box with listings of the specific genotype of the model and relevant phenotypes, all of which can be clicked to access  pages with additional detail. As w