RESUMEN
The aim of this study was to investigate the prognostic relevance of ß-catenin expression in oral squamous cell carcinoma (OSCC) and to explore relationships with the tumor immune microenvironment. Expression of ß-catenin and PD-L1, as well as lymphocyte and macrophage densities, were evaluated by immunohistochemistry in 125 OSCC patient specimens. Membranous ß-catenin expression was detected in 102 (81.6%) and nuclear ß-catenin in 2 (1.6%) tumors. There was an association between ß-catenin expression, tumoral, and stromal CD8+ T-cell infiltration (TIL) and also the type of tumor immune microenvironment (TIME). Tumors harboring nuclear ß-catenin were associated with a type II TIME (i.e., immune ignorance defined by a negative PD-L1 expression and low CD8+ TIL density), whereas tumors with membranous ß-catenin expression were predominantly type IV (i.e., immune tolerance defined by negative PD-L1 and high CD8+ TIL density). Combined, but not individual, high stromal CD8+ TILs and membranous ß-catenin expression was independently associated with better disease-specific survival (HR = 0.48, p = 0.019). Taken together, a combination of high stromal CD8+ T-cell infiltration and membranous ß-catenin in the tumor emerges as an independent predictor of better survival in OSCC patients.
RESUMEN
BACKGROUND: Glioblastoma multiforme (GBS) is a highly malignant glioma that rarely presents as an infratentorial tumor. Multicentric gliomas lesions are widely separated in site and/or time and its incidence has been reported between 0.15 and 10%. Multicentric gliomas involving supratentorial and infratentorial region are even more rare. In most cases, infratentorial disease is seen after surgical manipulation or radiation therapy and is usually located in the cerebellum or cervical region. CASE REPORT: We present a rare case of symptomatic multicentric glioma in the brain, fourth ventricle, cervical as well as lumbar glioblastoma in an adult without previous therapeutic intervention. We also review the literature of this rare presentation. CONCLUSIONS: This report suggests that GBM is a diffuse disease; the more extended the disease, the worse prognosis it has. The management still remains controversial and further studies are required to understand the prognosis factors of dissemination.