Comparison of STR-data has revealed, that the STR-profile of U-343 MGa cells is identical to GOS-3 described by DSMZ, Braunschweig. However,our morphological data clearly show, that the U-343 MG has the same morphology as one of the subclones of U-343 MGa which have been described by Nister, Heldin and Westermark in 1986. We aim to clarify this problem as soon as possible.