A 61-year-old man with locally advanced prostate cancer was found to have multiple solid intra-abdominal solid lesions during staging investigations.While some were in the pelvis,they were not located in the common landing sites for prostate cancer metastases,and his prostate specific antigen was not significantly elevated to suggest a high burden of metastatic disease.He reported a history of a blunt abdominal trauma due to a motor vehicle accident more than forty years ago which had been conservatively managed.His staging imaging revealed a lack of a discrete spleen in his left upper abdomen and this raised the suspicion that these solid lesions may represent ectopic splenic tissue.Imaging with nuclear medicine scintigraphy confirmed the lesions in his upper abdomen and pelvis to be splenunculi.He proceeded with a combination of androgen deprivation therapy and external beam radiotherapy for locally advanced,non-metastatic prostate cancer.Although it has been described in patients with low risk prostate cancer,this is the first case report of splenunculi mimicking metastases in a patient with locally advanced prostate cancer.
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