Immune Exclusion-Wnt/CTNNB1 Class Predicts Resistance to Immunotherapies in HCC
CLINICAL CANCER RESEARCH
Authors: Pinyol, Roser; Sia, Daniela; Llovet, Josep M.
Abstract
Next-generation sequencing has provided information on actionable targets and biomarkers of response in oncology. In hepatocellular carcinoma (HCC), Wnt/CTNNB1 mutations characterize the immune-excluded class (cold tumors) and might represent the biomarkers predicting resistance to immune checkpoint inhibitors. Large-scale validation of these data is needed to customize immunotherapy in advanced HCC. See related article by Harding et al., p. 2116
SOX11 expression in a case of papillary thyroid carcinoma with fibromatosis/fasciitis-like stroma containing BRAF c.1799_1801delTGA and CTNNB1 c.133T>C mutations
VIRCHOWS ARCHIV
Authors: Wong, Soon Boon Justin; Nga, Min En; Michal, Michal; Vanecek, Tomas; Seet, Ju Ee; Petersson, Fredrik
Abstract
We describe a case of papillary thyroid carcinoma with fibromatosis/fasciitis-like stroma (PTC-FLS) that contained the rare BRAF c.1799_1801delTGA (p.V600_K601delinsE) mutation, which has not previously been reported in this tumour, as well as the CTNNB1 c.133T>C (p.S45P) mutation. We also report the novel observation that spindle cells of the mesenchymal component exhibit diffuse nuclear but not cytoplasmic expression of SOX11, whereas the malignant epithelial cells did not. This suggests that immunoreactivity for SOX11 can be an alternative diagnostic tool for evaluating cases of PTC-FLS where the nuclear expression of beta-catenin is ambiguous.