攝護腺囊腫，在患者進行經直腸攝護腺超音波時，常為偶然之發現。但關於造成症狀之攝護腺囊腫，在近百年來的病例報告，可以說是相當少見。在我們的病例報告中，一位尿液滯留的患者，在超音波及斷層掃瞄檢查之後，診斷其排尿困難是由攝護腺囊腫所致。不同於文獻所報告的由恥骨後進行手術摘除囊腫、或由尿道經膀胱鏡下刮除囊腫；我們採用經直腸攝護腺超音波導引下抽吸囊腫，患者術後排尿困難症狀緩解，也無復發跡象。本病例報告分享了我們的治療經驗，也希望在類似患者的治療上，提供更多的選擇。

Prostatic cysts are frequently found during routine prostate studies, but they are usually asymptomatic, and little attention is given to them most of the time. We report a patient with a symptomatic prostatic cyst. Voiding difficulty was noted for several months and was exacerbated over the past few days. Transrectal ultrasonography was performed and revealed only mild prostate enlargement, but a huge prostate cyst (18 cm3) was noted. Pelvic computed tomography (CT) and seminovasography revealed that the cyst was confined to the left prostate gland, and no communication of the cyst with the seminal vesicle was shown. Transrectal sono-guided cyst aspiration was smoothly performed, and there was no sign of cyst recurrence during regular follow-up of x months/years[how long?]. Transrectal sono-guided cyst aspiration, rather than open surgery or transurethral cyst unroofing, can provide an alternative choice of treatment.