Interesting Images18F-DCFPyL Uptake in an Incidentally Detected Follicular Lymphoma by PET/CT Performed for Biochemically Recurrent Prostate CancerMeijer, Dennie BSc*; Wondergem, Maurits MD, PhD†; Knol, Remco J.J. MD, PhD†; Broos, Wouter A.M. MD†; van der Zant, Friso M. MD, PhD†Author Information From the *Department of Urology, Amsterdam University Medical Centers, Location VU Medical Center, Amsterdam †Department of Nuclear Medicine, Noordwest Ziekenhuisgroep, Location Alkmaar, Alkmaar, the Netherlands. Received for publication May 20, 2019; revision accepted June 4, 2019. Conflicts of interest and sources of funding: none declared. Correspondence to: Dennie Meijer, BSc, ORCID 0000-0002-8298-575X, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands. E-mail: firstname.lastname@example.org. Online date: July 30, 2019 Clinical Nuclear Medicine: February 2020 - Volume 45 - Issue 2 - p e96-e97 doi: 10.1097/RLU.0000000000002738 Buy Metrics Abstract A 75-year-old man, treated with curative intent for histopathologically proven prostate cancer (initial prostate-specific antigen, 27 ng/mL; Gleason 4 + 5 = 9) through external beam radiation therapy in 2010 in combination with 3 years of androgen deprivation therapy (leuprorelin), underwent 18F-DCFPyL PET/CT for biochemical recurrence with a prostate-specific antigen of 4.1 ng/mL in February 2019. Multiple pelvic and some para-aortic lymph nodes showed highly increased 18F-DCFPyL uptake, suspicious for metastases. Incidentally, a solid mesenteric mass and mesenteric lymph nodes with moderately increased 18F-DCFPyL uptake were found. Upon histopathological evaluation, this proved to be a low-grade follicular lymphoma. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.