A case of rectal metastasis of prostate cancer mimicking extramural growth-type rectal tumor

Author:

Hike Shutaro1ORCID,Endo Satoshi1,Ota Masayuki2,Ohira Gaku1,Maruyama Michihiro1,Imanishi Shunsuke1,Maruyama Tetsuro1,Tochigi Toru1,Amagai Hiroyuki1,Shiraishi Tadashi1,Hirata Atsushi1,Mamiya Hisashi1,Iwata Moe1,Kakimoto Ayano1,Matsubara Hisahiro1

Affiliation:

1. Department of Frontier Surgery, Graduate School of Medicine, Chiba University , Chiba 260-8670 , Japan

2. Department of Diagnostic Pathology, Graduate School of Medicine, Chiba University , Chiba 260-8670 , Japan

Abstract

Abstract Rectal metastases of prostate cancer are rare and may be difficult to diagnose. In this report, we describe a case in which an extramural growth-type rectal tumor was resected and pathologically diagnosed as prostate cancer metastasis. A 70-year-old man on hormone therapy for prostate cancer with seminal vesicle invasion and pelvic lymph node metastasis was referred to our department after an imaging scan showed an extramural growth-type rectal tumor. Endoscopic ultrasound-guided fine needle aspiration was considered for diagnosis, but the patient preferred an early resection without the exam, so surgery was performed. Histopathological examination revealed that the lesion was in the adventitia of the rectum and metastasis of prostate cancer. Metastatic lesions of prostate cancer are not indicated for resection. A detailed preoperative study with the possibility of prostate cancer metastasis in mind is necessary because it is relevant to choosing the treatment strategy.

Publisher

Oxford University Press (OUP)

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