Figure 4. vCyclin promotes tumor incidence and growth. (A) Tumor incidence over time in nude mice inoculated with cells transformed by different KSHV recombinant viruses. The threshold of tumor volume was set as 0.2 cm³ or whenever the tumor was palpable. (B) Tumor growth curves showing average tumor sizes. (C) Kaplan–Meier survival curves. (D) Immunohistochemical staining of tumors. Tumors were stained for H&E and LANA. Tumor analyses were performed when the volume reached 1 cm³.