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Case Reports in Urology
Volume 2013, Article ID 363072, 3 pages
Case Report

Spontaneous Regression of Primary Malignant Lymphoma of the Prostate

1Department of Radiology, Hiroshima Prefectural Hospital, 1-5-54 Ujinakanda Minami-ku, Hiroshima 734-8530, Japan
2Department of Urology, Hiroshima Prefectural Hospital, Japan
3Department of Pathology, Hiroshima Prefectural Hospital, Japan

Received 26 April 2013; Accepted 28 July 2013

Academic Editors: J. P. Gearhart, A. Greenstein, C. Liao, and J. Park

Copyright © 2013 Yoshio Monzen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We herein report a case of primary lymphoma of the prostate, which arose in an 85-year-old male with dysuria. CT and MRI examinations demonstrated a large mass in the prostate. A transrectal ultrasound-guided biopsy of the prostate was performed. The histological examination showed diffuse large B-cell lymphoma. The large lesion in the prostate showed spontaneous regression. Spontaneous regression of primary lymphoma of the prostate has not been reported previously. The spontaneous regression of primary lymphoma of the prostate observed in this patient suggests that observation may represent a viable treatment option following a biopsy that has provided a histopathological diagnosis.