Nobody needs "relative tumour sizes" to compare tumour growth curves

Tumour growth curve experiments play an important role in experimental onco logy and established methods exist for their unbiased interpretation. Howev er, many authors till introduce systemic biases to their data by using the so-called "relative tumour size" transformation, inspite of wide awarance a bout the limitations of this latter method. With this communication and by using a fictive exaggeration of the problems connected with the application of this transformation we would like to appeal to both authors and reviewe rs likewise to ban this potential source of misinterpretation from the onco logical literature.