A group of 8 MMTV CIS genes was identified where the viral integration events all occurred within the gene, including: Notch4, Nckap5, Pde3a, Usp31, Nxn, Phactr1, Cadm2 and Kcnj6 (Table 3). The gene discussed is NCKAP5; the disease is in situ carcinoma.