Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Instead of genotoxicity
In vitro clonality, insertional pattern, growth-factor independent growth and RCR studies
“The in vitro studies pertain 1) evaluation of clonality of the transduced cell population, 2) characterisation of the insertional pattern, 3) evaluation of growth-factor independent growth, and 4) assessment of break out of replication competent retroviruses (RCR).”
No in vivo study; in vitro clonality, insertion-site profile, growth-factor-independent growth and RCR assessments
“The in vitro studies pertain 1) evaluation of clonality of the transduced cell population, 2) characterisation of the insertional pattern, 3) evaluation of growth-factor independent growth, and 4) assessment of break out of replication competent retroviruses (RCR).”
Not required: species-specific product, standard rodent/NHP carcinogenicity studies not appropriate; in vitro oncogenic-risk studies instead
“The MM-TK DP is a species specific product and therefore standard carcinogenicity studies using rodents or non-human primates as described in the ICH guidelines are not appropriate.”