Clinical and biological landscape of constitutional mismatch-repair deficiency syndrome: an International Replication Repair Deficiency Consortium cohort study. Lancet Oncol 2024 May;25(5):668-682
Date
03/30/2024Pubmed ID
38552658DOI
10.1016/S1470-2045(24)00026-3Scopus ID
2-s2.0-85189080793 (requires institutional sign-in at Scopus site) 6 CitationsAbstract
BACKGROUND: Constitutional mismatch repair deficiency (CMMRD) syndrome is a rare and aggressive cancer predisposition syndrome. Because a scarcity of data on this condition contributes to management challenges and poor outcomes, we aimed to describe the clinical spectrum, cancer biology, and impact of genetics on patient survival in CMMRD.
METHODS: In this cohort study, we collected cross-sectional and longitudinal data on all patients with CMMRD, with no age limits, registered with the International Replication Repair Deficiency Consortium (IRRDC) across more than 50 countries. Clinical data were extracted from the IRRDC database, medical records, and physician-completed case record forms. The primary objective was to describe the clinical features, cancer spectrum, and biology of the condition. Secondary objectives included estimations of cancer incidence and of the impact of the specific mismatch-repair gene and genotype on cancer onset and survival, including after cancer surveillance and immunotherapy interventions.
FINDINGS: We analysed data from 201 patients (103 males, 98 females) enrolled between June 5, 2007 and Sept 9, 2022. Median age at diagnosis of CMMRD or a related cancer was 8·9 years (IQR 5·9-12·6), and median follow-up from diagnosis was 7·2 years (3·6-14·8). Endogamy among minorities and closed communities contributed to high homozygosity within countries with low consanguinity. Frequent dermatological manifestations (117 [93%] of 126 patients with complete data) led to a clinical overlap with neurofibromatosis type 1 (35 [28%] of 126). 339 cancers were reported in 194 (97%) of 201 patients. The cumulative cancer incidence by age 18 years was 90% (95% CI 80-99). Median time between cancer diagnoses for patients with more than one cancer was 1·9 years (IQR 0·8-3·9). Neoplasms developed in 15 organs and included early-onset adult cancers. CNS tumours were the most frequent (173 [51%] cancers), followed by gastrointestinal (75 [22%]), haematological (61 [18%]), and other cancer types (30 [9%]). Patients with CNS tumours had the poorest overall survival rates (39% [95% CI 30-52] at 10 years from diagnosis; log-rank p<0·0001 across four cancer types), followed by those with haematological cancers (67% [55-82]), gastrointestinal cancers (89% [81-97]), and other solid tumours (96% [88-100]). All cancers showed high mutation and microsatellite indel burdens, and pathognomonic mutational signatures. MLH1 or MSH2 variants caused earlier cancer onset than PMS2 or MSH6 variants, and inferior survival (overall survival at age 15 years 63% [95% CI 55-73] for PMS2, 49% [35-68] for MSH6, 19% [6-66] for MLH1, and 0% for MSH2; p<0·0001). Frameshift or truncating variants within the same gene caused earlier cancers and inferior outcomes compared with missense variants (p<0·0001). The greater deleterious effects of MLH1 and MSH2 variants as compared with PMS2 and MSH6 variants persisted despite overall improvements in survival after surveillance or immune checkpoint inhibitor interventions.
INTERPRETATION: The very high cancer burden and unique genomic landscape of CMMRD highlight the benefit of comprehensive assays in timely diagnosis and precision approaches toward surveillance and immunotherapy. These data will guide the clinical management of children and patients who survive into adulthood with CMMRD.
FUNDING: The Canadian Institutes for Health Research, Stand Up to Cancer, Children's Oncology Group National Cancer Institute Community Oncology Research Program, Canadian Cancer Society, Brain Canada, The V Foundation for Cancer Research, BioCanRx, Harry and Agnieszka Hall, Meagan's Walk, BRAINchild Canada, The LivWise Foundation, St Baldrick Foundation, Hold'em for Life, and Garron Family Cancer Center.
Author List
Ercan AB, Aronson M, Fernandez NR, Chang Y, Levine A, Liu ZA, Negm L, Edwards M, Bianchi V, Stengs L, Chung J, Al-Battashi A, Reschke A, Lion A, Ahmad A, Lassaletta A, Reddy AT, Al-Darraji AF, Shah AC, Van Damme A, Bendel A, Rashid A, Margol AS, Kelly BL, Pencheva B, Heald B, Lemieux-Anglin B, Crooks B, Koschmann C, Gilpin C, Porter CC, Gass D, Samuel D, Ziegler DS, Blumenthal DT, Kuo DJ, Hamideh D, Basel D, Khuong-Quang DA, Stearns D, Opocher E, Carceller F, Baris Feldman H, Toledano H, Winer I, Scheers I, Fedorakova I, Su JM, Vengoechea J, Sterba J, Knipstein J, Hansford JR, Gonzales-Santos JR, Bhatia K, Bielamowicz KJ, Minhas K, Nichols KE, Cole KA, Penney L, Hjort MA, Sabel M, Gil-da-Costa MJ, Murray MJ, Miller M, Blundell ML, Massimino M, Al-Hussaini M, Al-Jadiry MF, Comito MA, Osborn M, Link MP, Zapotocky M, Ghalibafian M, Shaheen N, Mushtaq N, Waespe N, Hijiya N, Fuentes-Bolanos N, Ahmad O, Chamdine O, Roy P, Pichurin PN, Nyman P, Pearlman R, Auer RC, Sukumaran RK, Kebudi R, Dvir R, Raphael R, Elhasid R, McGee RB, Chami R, Noss R, Tanaka R, Raskin S, Sen S, Lindhorst S, Perreault S, Caspi S, Riaz S, Constantini S, Albert S, Chaleff S, Bielack S, Chiaravalli S, Cramer SL, Roy S, Cahn S, Penna S, Hamid SA, Ghafoor T, Imam U, Larouche V, Magimairajan Issai V, Foulkes WD, Lee YY, Nathan PC, Maruvka YE, Greer MC, Durno C, Shlien A, Ertl-Wagner B, Villani A, Malkin D, Hawkins C, Bouffet E, Das A, Tabori UAuthors
Donald Basel MD Chief, Professor in the Pediatrics department at Medical College of WisconsinRyuma Tanaka MD Assistant Professor in the Pediatrics department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AdolescentAdult
Brain Neoplasms
Child
Child, Preschool
Colorectal Neoplasms
Cross-Sectional Studies
DNA Mismatch Repair
DNA-Binding Proteins
Female
Humans
Incidence
Longitudinal Studies
Male
MutL Protein Homolog 1
MutS Homolog 2 Protein
Mutation
Neoplastic Syndromes, Hereditary
Young Adult
