In other studies, Nakagawa et al identified a germline mutation in exon six of STK11 in five out of ten PJS patients (30), Connolly et al observed mutations in exons 4 and 6 in two SCTAT patients with PJS (25) and Hemminki et al identified a mutation in exon 1 in seven out of 12 PJS patients (29). The gene discussed is STK11; the disease is Peutz-Jeghers syndrome.