Immune checkpoint inhibitor in a case with primary urethral adenocarcinoma with lung metastasis

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Primary urethral adenocarcinoma is extremely rare, and the clinical experience in optimizing the management is limited. The efficacy of immune checkpoint inhibitors for these patients is not clear. Here, we describe a 52-year-old patient with primary urethral adenocarcinoma accompanied by inguinal lymph nodes and lung metastasis with progressive disease after radiotherapy and multiline chemotherapy. The expression of programmed cell death ligand-1 (PD-L1) was positive. Hence, this patient was treated with tislelizumab, an immune checkpoint inhibitor. The disease is well controlled and the overall survival time is 5 years. Moreover, the patient tolerated the treatment well. To our knowledge, this is the first reported case in which immunotherapy was used for primary urethral adenocarcinoma. The immune checkpoint inhibitors may be a novel option for the treatment of these patients.

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