PSMA Accumulation in Lower Extremity Lymphedema and Hydrocele.

Tobar, Merve Nida Calderon; Perktas, Lutfi; Önner, Hasan · Clin Nucl Med · 2025

case_report · Level V

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Abstract

The development of radiolabeled small-molecule prostate-specific membrane antigen (PSMA) inhibitors has advanced molecular imaging in prostate cancer. The use of 177 Lu-PSMA is especially beneficial because its therapeutic β-emission combined with γ-radiation enables precise treatment and comprehensive imaging in patients with prostate cancer. We present a case of a prostate cancer patient who developed lower extremity lymphedema and hydrocele secondary to prior radiotherapy. Posttherapy whole-body imaging following 177 Lu-PSMA treatment revealed dermal backflow with a notable accumulation of soft tissue in the lower extremities and hydrocele.

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