Absence of UNG and/or MSH2 influences lymphomagenesis in IµHABcl6 mice. (A) Kaplan-Meier overall survival curves for IµHABcl6 mice with indicated genotypes. Median survival for IµHABcl6 and IµHABcl6 Ung^−/− mice was not reached. P values were calculated using log-rank (Mantel-Cox) tests. (B) Distribution of tumor types among the different genotypes (“other” indicates histiocytic sarcoma and squamous cell carcinoma).