Imaging and clinical features of giant multilocular prostatic cystadenoma: A case report.

RATIONALE Giant multilocular prostatic cystadenoma (GMPC) is a rare type of prostatic epithelial neoplasm. Thus, the imaging features of this condition are not well known. We report the imaging and clinical manifestations of a case of GMPC. PATIENT CONCERNS The case reported here relates to a 71-year-old man who complained of urination frequency and excessive urination at night. He underwent computed tomography (CT) and magnetic resonance imaging (MRI) examination before surgery, both tests revealed a mass body in the prostate. DIAGNOSIS Ultrasound-guided fine needle aspiration was performed and a diagnosis of GMPC was made by histological examination. INTERVENTIONS The patient received radical pelvic tumor resection successfully. OUTCOMES Two months after surgery, the follow-up CT and magnetic MRI re-examination found no signs of recurrence. LESSONS GMPC is a rare prostatic neoplasm with atypical clinical symptoms. MRI provides valuable information about GMPC. In case of a giant multilocular prostatic mass with well-defined boundary and abundant vascularity, benign feature on diffusion-weighted imaging, GMPC should be considered.