Uveal melanoma (UM) is a rare cancer that affects the choroid and, less frequently, the ciliary body or the iris (for recent reviews see [1-3]). Despite a profound knowledge of the oncogenic mechanisms behind UM tumorigenesis and despite an accurate cytogenetic and molecular prognosis, only limited advances have been made in UM therapy.

Myeloproliferative neoplasms (MPN) are occasionally associated with autoimmune manifestations. The prevalence of positive direct antiglobulin test (DAT) in patients with JAK2V617F mutation is not yet known.

Gastrointestinal stromal tumors are mesenchymal tumors which predominantly originate from the interstitial cells of Cajal in the intestinal lining. Around ~85% of malignant GISTs possess activating mutations in the tyrosine kinase receptors KIT or PDGFRA. The driver mutations in genes other than KIT or PDGFRA account for around 15% GISTs and belong to highly heterogeneous groups called wild-type GISTs. Around 20–40% of WT-GISTS are deficient for the succinate dehydrogenase complex (SDHA, SDHB, SDHC, SDHD). 

Metastatic breast cancer to brain carries poor prognostic features with increased risks of occurrence in Tripple- negative and HER- positive breast tumors. In addition, tumors with mutated BRCA tumors, carry as well increased metastatic incidence. However, new clinical evidence suggest distinct clinical features between BRCA1 or BRCA2 mutated breast cancer and brain metastasis. Review of literature may help characterize the distinctive differences between BRCA1 or BRCA2 breast tumors and subsequent metastasis to brain.

Eight protein biomarkers (ER, PR, HER2, Cyclin A2, Cytokeratin 5, Vimentin, Bcl2, and Ki-67) were evaluated using tissue microarrays (TMAs) and immunohistochemistry (IHC). The IHC results from TMAs were analyzed by both supervised and unsupervised clustering methods. The predictive clusters for the supervised and unsupervised methods were compared for agreement with the empirical classification. Kappa values were used to determine the overall percent correct clusters and agreement between specific clusters.