Korean J Urol.  2009 Dec;50(12):1262-1264.

Retrovesical Multilocular Prostatic Cystadenoma Mimicking a Pelvic Cavity Tumor

• Hwang EC
• Park JB
• Jung SI
• Im CM
• Kim SO
• Kang TW
• Kwon DD
• Park K
• Ryu SB
• Choi C

Abstract

We report the case of a 58-year-old man with a multilocular prostatic cystadenoma in the retrovesical space that mimicked a pelvic cavity tumor. Multilocular prostatic cystadenoma is a rare form of benign prostatic hyperplasia that originates from the prostate with extensive spread into the pelvis. Histologically, the tumor consisted of glands and cysts lined by prostatic-type epithelium lying in a hypocellular fibrous stroma. For a cystic tumor adjacent to the urinary tract, ectopic prostatic cystadenoma is needed to be considered in the differential diagnosis of pelvic cavity tumors.

Keyword

Cystadenoma; Prostate

MeSH Terms

Cystadenoma
Deception
Diagnosis, Differential
Epithelium
Humans
Middle Aged
Pelvis
Prostate
Prostatic Hyperplasia
Urinary Tract

Figure

• 

  Fig. 1 Pelvic computed tomography. Transverse (A) and coronal (B) views showed a heterogeneously enhanced 6 cm mass. The border between the mass and the other organs is distinct.

• 

  Fig. 2 The cut surface of the resected tumor shows solid and small cystic lesions.

• 

  Fig. 3 Microscopically, dilated cysts of various sizes were found in most of the field. A few normal-looking prostatic glands were noted between the cysts (H&E, ×20).

• 

  Fig. 4 The glandular epithelial cells are immunoreactive for prostate-specific antigen (PSA) (×40).

Reference

1. Choi YH, Namkung S, Ryu BY, Choi KC, Park YE. Giant multilocular prostatic cystadenoma. J Urol. 2000. 163:246–247.

2. Kirsch AJ, Newhouse J, Hibshoosh H, O'Toole K, Ritter J, Benson MC. Giant multilocular cystadenoma of the prostate. Urology. 1996. 48:303–305.

3. Hauck EW, Battmann A, Schmelz HU, Diemer T, Miller J, Weidner W, et al. Giant multilocular cystadenoma of the prostate: a rare differential diagnosis of benign prostatic hyperplasia. Urol Int. 2004. 73:365–369.

4. Yang HT, Kang JS, Kang DG, Song JW, Jeong HH, Choi NG. A case of giant multilocular prostatic cystadenoma. Korean J Urol. 2000. 41:791–793.

5. Seong BM, Cheon J, Lee JG, Kim JJ, Chae YS. A case of multilocular prostatic cystadenoma. J Korean Med Sci. 1998. 13:554–558.

6. Lim DJ, Hayden RT, Murad T, Nemcek AA Jr, Dalton DP. Multilocular prostatic cystadenoma presenting as a large complex pelvic cystic mass. J Urol. 1993. 149:856–859.

7. Ito H, Fuse H, Hirano S, Masuda S. Ectopic prostatic tissue outside the urinary tract: a case report. Int J Urol. 1998. 5:391–392.

8. Hamasaki T, Akasaka S, Yamaguchi R, Inatomi H, Takahashi K, Matsumoto T, et al. Diagnosis of retrovesical ectopic and hyperplastic prostate tissue by transrectal needle biopsy. Urol Int. 2001. 66:171–173.