Relapsed urachal carcinoma responding to first‐line chemotherapy with capecitabine‐oxaliplatin plus bevacizumab

INTRODUCTION: Advanced urachal carcinoma has a poor prognosis; however, a standard systemic treatment has not been established. We treated a patient with relapsed urachal carcinoma with capecitabine‐oxaliplatin plus bevacizumab, a standard regimen for colon cancer, and obtained favorable responses. CASE PRESENTATION: A 47‐year‐old woman presented with hematuria. Under the diagnosis of non‐metastatic urachal carcinoma, an extended partial cystectomy was performed. Histopathological examination revealed adenocarcinoma with negative surgical margins and lymph nodes. Thirty‐two months postoperatively, lung metastases and local recurrence were confirmed, along with elevated carcinoembryonic antigen levels, and nine chemotherapy cycles were administered. Subsequently, the recurrent lesion regressed, and tumor marker levels normalized. Fourteen months after treatment discontinuation, the disease remained stable without progression. CONCLUSION: This is the first report of advanced urachal carcinoma treated with capecitabine‐oxaliplatin plus bevacizumab, demonstrating the potential of this treatment as first‐line chemotherapy for this disease.