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Melanoma poses significant challenges due to its resistance to conventional therapies and increasing incidence rates. Stage III melanoma, characterised by regional lymph node involvement, has a high risk of recurrence despite surgical resection. Adjuvant immunotherapy, particularly using the PD-1 inhibitors pembrolizumab and nivolumab, has shown promising results in improving recurrence-free survival (RFS) and overall survival (OS) in Stage III melanoma patients. This retrospective analysis examined the effects of adjuvant pembrolizumab or nivolumab on patients with Stage III melanoma treated in a tertiary oncology centre. Of the 110 patients, 95 received pembrolizumab and 15 received nivolumab. The pembrolizumab completion rate was 62.1%, with 31.2% discontinuing due to disease progression or adverse effects. The nivolumab completion rate was lower at 40%, with 60% discontinuing due to toxicity or disease progression. Grade 3 or higher toxicities were observed in 17% of pembrolizumab and 53.3% of nivolumab patients. Disease progression occurred in 27.4% of pembrolizumab and 26.7% of nivolumab patients. Pembrolizumab showed a 12-month RFS of 78.9% and 24-month RFS of 77.6%, with an OS of 97.9% at 12 months. Nivolumab exhibited a 12-month RFS of 86.7% and 24-month RFS of 80%. RFS rates varied by disease stage and mutation status. Adjuvant pembrolizumab and nivolumab both demonstrate efficacy in improving RFS and OS in Stage III melanoma patients. Pembrolizumab has higher completion rates and fewer toxicities compared to nivolumab. Further studies are warranted to explore long-term outcomes and optimise treatment strategies.

The APIS Breast Cancer Subtyping Kit is an mRNA-based assessment of the seven parameters including three biomarkers routinely assessed in all the newly diagnosed breast cancers (BC), oestrogen receptor (ER), progesterone receptor (PR) and HER-2 and an additional four genes that create a novel proliferation signature, MKI67, PCNA, CCNA2 and KIF23. Taken together, the data are used to produce a molecular subtype for every sample. The kit was evaluated against the current standard protocol of immunohistochemistry (IHC) and/or in situ hybridisation (ISH) in breast cancer patients. The data were presented at the weekly breast multidisciplinary team (MDT) meeting. A total of 98 consecutive cases of pre-operative breast cancer core biopsies and two core biopsies of nodal metastases yielding 100 cases were assessed. IHC and APIS results were available for 100 and 99 cases. ER was concordant in 97% cases, PR was concordant in 89% and HER-2 results were concordant with IHC/ISH in 100% of the cases. Ki-67 IHC was discordant in 3% of cases when compared with MK167 alone but discordant in 24% when compared with the four-gene proliferation signature. In conclusion, our study indicates that the APIS Breast Cancer Subtyping Kit is highly concordant when compared to the results produced for ER/PR/HER-2 by IHC and/or ISH. The assay could play a role in the routine assessment of newly diagnosed breast cancer (BC) specimens.