Prevalence of APC and PTEN Alterations in Urachal Cancer.

Prevalence of APC and PTEN Alterations in Urachal Cancer. Pathol Oncol Res. 2020 Aug 04;: Authors: Nagy N, Reis H, Hadaschik B, Niedworok C, Módos O, Szendrői A, Bíró K, Hager T, Herold T, Ablat J, Black PC, Okon K, Tolkach Y, Csizmarik A, Oláh C, Keresztes D, Bremmer F, Gaisa NT, Kriegsmann J, Kovalszky I, Kiss A, Tímár J, Szász MA, Rink M, Fisch M, Nyirády P, Szarvas T Abstract Urachal carcinoma (UrC) is a rare tumor with remarkable histological and molecular similarities to colorectal cancer (CRC). Adenomatous polyposis coli (APC) is the most frequently affected gene in CRC, but the prevalence and significance of its alterations in UrC is poorly understood. In addition, loss of phosphatase and tensin homologue (PTEN) was shown to be associated with therapy resistance in CRC. Our primary aim was to assess specific genetic alterations including APC and PTEN in a large series of UrC samples in order to identify clinically significant genomic alterations. We analyzed a total of 40 UrC cases. Targeted 5-gene (APC, PTEN, DICER1, PRKAR1A, TSHR, WRN) panel sequencing was performed on the Illumina MiSeq platform (n = 34). In addition, ß-catenin (n = 38) and PTEN (n = 30) expressions were assessed by immunohistochemistry. APC and PTEN genes were affected in 15% (5/34) and 6% (2/34) of cases. Two of five APC alterations (p.Y1075*, p.K1199*) were truncating pathogenic mutations. One of the two PTEN variants was a pathoge...
Source: Pathology Oncology Research - Category: Pathology Authors: Tags: Pathol Oncol Res Source Type: research