Cowden syndrome | British Dental Journal
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Sabir A, Parry G, Heaton T, Ong K R. Cowden syndrome: new clinical features in a large family; joint hyperextensibility, dental abnormalities and gingival enlargement. BMJ Case Rep 2021; 14:
DOI: 10.1136/bcr-2020-236768.
Novel features of Cowden syndrome include gingival enlargement and dental abnormalities.
A four-year-old boy presented with his mother to genetics in the 1980s, with a family history (FH) of macrocephaly and intellectual disability (ID). He remained undiagnosed until his mother
developed multiple cancers and was diagnosed with Cowden syndrome (CS) in 2017, a rare, multisystem cancer predisposition syndrome. CS was then confirmed in multiple family members. Clinical
examination revealed potentially novel features; gingival enlargement, dental abnormalities and joint hyperextensibility. These features could contribute to revised PTEN hamartoma tumour
syndrome, National Comprehensive Cancer Network, minor diagnostic criteria. The paediatric CS phenotype is still emerging, and features expressed in this family during childhood could
potentially aid paediatric diagnosis.
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