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Family trees of the 16 serrated polyposis syndrome families indicated in the study. A black arrow indicates the index case in each family. Current age is specified (for age of onset see Table 1). SPS, serrated polyposis syndrome; CRC, colorectal cancer. Bile duct, brain, breast, colon, GI (gastrointestinal), larynx, liver, ovary, pancreas, prostate, skin, stomach, thyroid and uterine refer to the type of cancer.
