STK11 and polyp: Among these 18 polyp samples, 11 SJP samples were from paediatric patients with 1–2 polyps; two typical JPS samples were from two patients who underwent 8 and 14 colonoscopies, respectively, and 112 and 116 polyps were removed during the most recent colonoscopy, respectively; and five PJS samples were from five patients with a germline mutation in the STK11/LKB1 gene.