18 F-FDG PET/CT in Rhabdomyosarcoma of the Prostate in an Infant.

Schweighofer, Nina; Filipič, Martina; Varda, Nataša Marčun; Cuderman, Anka; Prevodnik, Veronika Kloboves; Talakić, Emina · Clin Nucl Med · 2026

case_report · Level V

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Abstract

Rhabdomyosarcoma (RMS) of the prostate is a rare tumor in infants. RMS frequently arises in genitourinary tract (~20% of cases), with the embrional subtype being the most common. 1,2 The presenting symptoms are usually not specific, often leading to an extensive diagnostic work-up before identifying RMS. 3,4 Furthermore, there are no biomarkers specific to RMS. We present the case of a 4-month-old boy with postrenal acute kidney injury (AKI). Abdominal ultrasound and magnetic resonance imaging (MRI), followed by ultrasound-guided fine-needle aspiration biopsy and citopathological examination, established the diagnosis of prostatic RMS, which was later staged with 18 F-FDG PET/CT. 5.

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