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Co-occurrence of Beckwith–Wiedemann Syndrome and colorectal cancer in a young woman

ABSTRACT: Co-occurrence of Beckwith–Wiedemann Syndrome and colorectal cancer in a young woman

PROVIDER: PRJNA930354 | ENA |

REPOSITORIES: ENA

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Co-occurrence of Beckwith–Wiedemann Syndrome and colorectal cancer in a young woman

Project description:Beckwith-Wiedemann Spectrum (BWSp) is a disorder predisposing to tumors of embryonic origin that arise during childhood. Little is known concerning the tumor risk and histotype prevalence in adult BWSp patients. However, several studies report cases of co-occurrence of BWSp and tumors in early adulthood, suggesting that the cancer risk in BWSp could be relevant also later than childhood. Here, we report for the first time a case of co-occurrence of BWSp and early-onset colorectal cancer (EO-CRC). The results disclosed genetic and epigenetic molecular lesions of the patient at both somatic and germline levels, providing support to the hypothesis that epigenetic changes contribute to cancer initiation in tissues where a genetic insult is already present, acting in a cooperative manner to stimulate tumorigenesis.

2023-04-01 | GSE224222 | GEO

Co-occurrence of Beckwith-Wiedemann syndrome and Pseudohypoparathyroidism type 1B: coincidence or common molecular mechanism?

Project description:Imprinting disorders are congenital diseases caused by dysregulation of genomic imprinting, affecting growth, neurocognitive development, metabolism and cancer predisposition. Overlapping clinical features are often observed among this group of diseases. In rare cases, two fully expressed imprinting disorders may coexist in the same patient. A dozen cases of this type have been reported so far. Most of them are represented by individuals affected by Beckwith-Wiedemann spectrum (BWSp) and Transient Neonatal Diabetes Mellitus (TNDM) or BWSp and Pseudo-hypoparathyroidism type 1B (PHP1B). All these patients displayed multilocus imprinting disturbances (MLID). Here, we report the first case of co-occurrence of BWS and PHP1B in the same individual in absence of MLID. Genome-wide methylation and SNP-array analyses demonstrated loss of methylation of the KCNQ1OT1:TSS-DMR on chromosome 11p15.5 as molecular cause of BWSp, and upd(20)pat as cause of PHP1B. The absence of MLID and the heterodisomy of chromosome 20 suggests that BWSp and PHP1B arose through distinct and independent mechanism in our patient.

2023-08-01 | GSE237676 | GEO

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