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Pretreatment neutrophil-to-lymphocyte ratio elevation was an independent poor prognostic factor for metastatic urothelial carcinoma undergoing salvage chemotherapy. Our newly constructed prognostic model including the pretreatment neutrophil-to-lymphocyte ratio proved to be an excellent discriminator of overall survival.

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Ovarian-type surface epithelial neoplasms of the testis and paratestis are uncommon, and the mucinous subtype is particularly rare. These tumors represent a counterpart to ovarian cancer. Malignant tumors have the potential for metastatic spread and are often fatal. The case of a 59-year-old man with testicular mucinous adenocarcinoma is presented. Computed tomography indicated involvement of the paraaortic and pelvic lymph nodes, so chemotherapy was initiated. To the best of our knowledge, this is the second paper regarding responsiveness to chemotherapies used in ovarian cancer.

All models were demonstrated to have high external validities in real-world patients, and of them, the "Apolo model" achieved the highest c-index in the present population. Further studies with larger populations are needed for establishment of the next standard model.