Diagnosis of Retrovesical Ectopic and Hyperplastic Prostate Tissue by Transrectal Needle Biopsy

Abstract

We report on an ectopic prostate in a 50-year-old man. Transabdominal ultrasonography, pelvic computed tomography, and pelvic magnetic resonance imaging revealed a heterogeneous tumor 8 cm in diameter in contact with the posterior wall of the urinary bladder. The tumor was histologically confirmed to be a benign prostatic hyperplasia. This is the 3rd case of retrovesical ectopic prostatic tissue which was diagnosed by transrectal needle biopsy.

Ectopic prostatic tissue: histogenesis and histopathological characteristics

“…Other sites outside these regions have been described, including the anal canal, 24 pericolic fat, 25 retroperitoneum, 26 and spleen 27 . Multiple cases of hyperplasia in ectopic prostatic tissue causing obstructive symptoms have been described 28–31 . A single case of adenocarcinoma occurring in ectopic prostatic tissue has been documented 32 .…”

An unusual case of retrovesical ectopic prostate tissue accompanied by primary prostate cancer

“…The majority of previously reported similar cases were diagnosed postoperatively. Transrectal ultrasound-guided biopsy was performed only in 3 previous cases [4,12]. In the present case, we also performed a needle biopsy but didn't get the retrovesical tumor; instead, the unexpected prostatic cancer was found.…”

“…Most aberrant prostatic tissue occurs in the urethra [6] and urinary bladder [7], but has also been observed in the testis [8], epididymis [9], seminal vesicle [5], cervix, and vagina [10]. Up to now, a few cases of retrovesical ectopic prostate have been reported in English medical literature [2-4]. However, to our knowledge, there have been no previously reported cases of retrovesical ectopic prostate accompanied by primary prostate cancer.…”

“…However, only 10 cases of ectopic prostatic tissue situated in the retrovesical space have been published up to date [2-4]. Here, we report an unusual case of retrovesical benign ectopic prostatic tissue accompanied by primary prostate cancer.…”

A novel submucosa nodule of the rectum: A case of the ectopic prostatic tissue outside the urinary tract

“…Most cases were diagnosed postoperatively, even were incidental finding on surgical specimens without any relative clinical presentation. 5 - 7 The imaging studies, such as CT, MRI, and ultrasound, as well as the endoscopy are easy to reveal big lesions, meanwhile CT or ultrasound-guided biopsy can be performed 8 ,but non-effective for small ones. Histological sections of the specimens revealed the typical histological features of prostatic acini and stroma.…”