Histological subtype is associated with PD-L1 expression and CD8+ T-cell infiltrates in triple-negative breast carcinoma.

Assessment of programmed death-ligand 1 (PD-L1) expression and CD8+ lymphocyte infiltrates in triple-negative breast carcinoma (TNBC) can provide valuable prognostic and predictive information. Knowledge of clinical and pathological factors that predict the status of these two markers is needed to better select patients likely to respond to immunotherapy. We aim to assess the association between histological subtypes of TNBC and tumor microenvironment type, defined here as each tumor's PD-L1 status and the percentage of CD8+ cells in its tumor-associated lymphocyte population.

Immunohistochemistry Critical Assay Performance Controls (ICAPC) Reduce Interobserver Variability in the Interpretation of BRAFV600E Immunohistochemistry.

The utility of prognostic and predictive immunohistochemistry biomarkers in the context of cancer is plagued by inconsistent interpretation of results which can lead to poor rates of adoption or inappropriate use of novel therapeutic strategies. To monitor immunohistochemistry assay performance, a new on-slide control motif, Immunohistochemistry Critical Assay Performance Controls (ICAPC) was developed. We hypothesized that the use of these controls by the diagnosing pathologist to interpret BRAFV600E would result in reduced interobserver and intraobserver interpretation errors.

Transtubal Spread of a Superficially Invasive Cervical Adenocarcinoma to the Ovaries After 11 Years.

We report a 55-yr-old woman who presented with bilateral ovarian masses, 11 yr after hysterectomy for superficially invasive stage IA1 cervical adenocarcinoma of usual (human papillomavirus-associated) type. The bilateral ovarian tumors were composed of glands lined by malignant mucinous epithelium and these tumors were metastases from her previous cervical adenocarcinoma, based on morphology, immunophenotype, and positive in situ hybridization for human papillomavirus. In addition, there was extensive involvement of the mucosa of the left fallopian tube by malignant mucinous epithelium.