The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

Major Genetic Syndromes ¹

Added text ² to state that the management of adenomas in the stomach is individualized based on the size of the adenoma and the degree of dysplasia.

Added text ³ to state that isolated and multiple hyperplastic polyps are common in the general population and do not suggest an underlying genetic disorder.

Added text ⁴ to state that several studies show that the prevalence of colorectal adenocarcinoma in patients with formally defined criteria for hyperplastic polyposis syndrome (HPPS) is 50% or more (cited Leggett et al., Place et al., Hyman et al., and Koide et al. as references 306, 308, 309, and 310, respectively).