Metastasectomy of a solitary liver tumor from prostate cancer after radical prostatectomy

INTRODUCTION: Metastasectomy of oligometastatic prostate cancer has the potential to contribute to improving prognosis. We report on a case of metastasectomy of solitary liver tumor after radical prostatectomy. CASE PRESENTATION: An 80‐year‐old man underwent radical prostatectomy for prostate cancer, followed by radiotherapy after the operation because of increased serum prostate‐specific antigen levels of 0.529 ng/mL. Levels increased further to 0.997 ng/mL even after salvage therapy. The patient then received androgen deprivation therapy. Levels remained stable for 3 years, but rapidly increased to 19.781 ng/mL in the following 6 months. Abdominal computed tomography revealed a solitary liver tumor, and no metastasis to other sites was identified. The patient underwent liver segmentectomy. Microscopic examination of excised specimens revealed prostate cancer cells. Five years after surgery, serum prostate‐specific antigen maintained to the lowest level so far. CONCLUSION: Metastasectomy might be a beneficial therapeutic option to improve the prognosis for solitary metastasis from prostate cancer.