RT Journal Article
SR Electronic
T1 High yield of surveillance in patients diagnosed with constitutional mismatch repair deficiency
JF Journal of Medical Genetics
JO J Med Genet
FD BMJ Publishing Group Ltd
SP 679
OP 684
DO 10.1136/jmg-2022-108829
VO 60
IS 7
A1 Ghorbanoghli, Zeinab
A1 van Kouwen, Mariëtte
A1 Versluys, Birgitta
A1 Bonnet, Delphine
A1 Devalck, Christine
A1 Tinat, Julie
A1 Januszkiewicz-Lewandowska, Danuta
A1 Costas, Consuelo Calvino
A1 Cottereau, Edouard
A1 Hardwick, James C H
A1 Wimmer, Katharina
A1 Brugieres, Laurence
A1 Colas, Chrystelle
A1 Vasen, Hans F A
YR 2023
UL http://jmg.bmj.com/content/60/7/679.abstract
AB Background Constitutional mismatch repair deficiency (CMMRD) is a rare autosomal recessively inherited syndrome that is caused by biallelic pathogenic variants of the mismatch repair genes. It is characterised by the development of multiple tumours in the first and second decade of life including brain, gastrointestinal and haematological tumours often resulting in early death. In order to improve the prognosis of these patients, the European collaborative group ‘care for CMMRD’ developed a surveillance programme in 2014 and established a registry of patients with CMMRD in Paris. The aim of the study was to evaluate the outcome of this programme.Methods Twenty-two patients with a definitive diagnosis of CMMRD and with at least one follow-up study were selected from the registry. Medical data on the outcome of surveillance were collected from these patients.Results During a mean follow-up of 4 years, the programme detected eight malignant tumours including three brain tumours, three upper gastrointestinal cancers and two colorectal cancers. Most tumours could successfully be treated. In addition, many adenomas were detected in the duodenum, and colorectum and subsequently removed. Seven patients developed a symptomatic malignancy, including two brain tumours, one small bowel cancer and four haematological malignancies. At the end of the follow-up, 16 out of 22 patients (73%) who participated in the surveillance programme were still alive.Conclusion The study suggests a beneficial effect of surveillance of the digestive tract and brains.All data relevant to the study are included in the article or uploaded as supplementary information.