OBJECTIVETo study the clinicopathological characteristics of prostatic cystadenoma (PC).

METHODSA sample from surgically removed tissues of a PC patient was examined by conventional pathology and immunohistochemistry. The clinical data and clinicopathological features were analyzed, and the related literature reviewed.

RESULTSThe patient was a male aged 55 years, treated by TUVP for dysuria a year before. The tumor was a grey mass, with lots of different sized capsular spaces full of clear white liquid in the cross section. Histologically, the tumor cells were arranged in a sieve-like, microcapsule-shaped or adenoid pattern, lined with cuboidal and columnar epithelial cells, the nuclei located in the base with neither cellular atypia nor mitosis. Concerning the immunophenotype, PSA, PAP and CK7 were positively expressed in the columnar epithelial cells and 34betaE12 in the basal cells, while CK20, P504S, CEA and villin were negatively expressed, with Ki67 + < 2%.

CONCLUSIONProstatic cystadenoma is a rare benign tumor originating in the prostate, with a unique morphological structure, and mostly with the expressions of PSA and PAP.

Residual urine can be erroneously estimated due to cystic pelvic pathology by portable ultrasound scanning. We report a case involving a false-positive elevated postvoid residual urine result using a bladder ultrasound caused by an ovarian cystadenoma unrelated to the urinary tract.
Cystadenoma* ; Ovarian Neoplasms ; Pathology ; Ultrasonography* ; Urinary Bladder ; Urinary Tract

Acinar cystic transformation of the pancreas is also known as acinar cell cystadenoma (ACC), and this is an extremely rare benign lesion that was first described in April 2002. We report here on a case of a previously asymptomatic patient with pancreatic ACC and this was diagnosed by computed tomography (CT) and magnetic resonance imaging (MRI). To the best of our knowledge, there is no previous report concerning the CT or MRI features of ACC in the medical literature. We present here the CT, MRI and pathological findings of pancreatic ACC.
Cystadenoma/pathology/*radiography ; Humans ; Male ; Middle Aged ; Pancreatic Neoplasms/pathology/*radiography

Cystadenoma, Mucinous ; diagnosis ; pathology ; surgery ; Humans ; Ileal Neoplasms ; diagnosis ; pathology ; surgery ; Male ; Middle Aged

Giant multilocular prostatic cystadenoma (GMPC) is a rare benign tumor involving the prostate gland. Microscopically, it masquerades phyllodes tumor or transitional zone hyperplasia. We report one case of GMPC arising from the prostate central zone (CZ), presenting with long-standing aspermia associated with seminal vesicle fibrous obliteration.
Aspermia/etiology/*pathology ; Cystadenoma/complications/*pathology ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Prostate/*pathology ; Prostatic Neoplasms/complications/*pathology

The serous cystadenoma of the pancreas is a rare lesion that is usually found incidentally. It is mostly observed as a spongy microcystic mass but rare variants such as macrocystic, unicystic, or multicentric are also seen. We recently experienced a unique case of unicystic serous cystadenoma mimicking a pseudocyst. It was grossly a unilocular cyst with surrounding dense fibrosis resembling a pseudocyst. Microscopically, the cyst was partly lined by low columnar-to-cuboidal cells with clear cytoplasm containing glycogen.
Adult ; Case Report ; Cystadenoma, Serous/pathology* ; Cysts/pathology* ; Diagnosis, Differential ; Female ; Human ; Pancreatic Diseases/pathology* ; Pancreatic Neoplasms/pathology*

Hepatobiliary cystadenomas are rare cystic neoplasms that often occur in middle aged women. The exact etiology of these tumors is unknown. Diagnosis is often delayed in these cases. However, misdiagnosis and inappropriate treatment may result in unfavorable outcome. We report a case of hepatobiliary cystadenoma with pleural effusion. We also review the literature and discuss the current diagnostic and treatment modalities.
Bile Duct Neoplasms ; diagnosis ; pathology ; Bile Ducts, Intrahepatic ; pathology ; Cystadenoma ; diagnosis ; pathology ; Female ; Humans ; Middle Aged ; Pleural Effusion ; diagnosis ; pathology

Leiomyoma of the ovary is a very rare benign tumor which is usually found incidentally on routine pelvic examination, or during surgery or autopsy. We report a case of ovarian leiomyoma in a 46-year-old woman in whom a lower abdominal mass was detected. A multiloculated and multiseptated mainly cystic mass in the left adnexa was revealed by computed tomography, and was thought to be an ovarian mucinous cystadenoma. Surgical pathology, however, demonstrated that the mass was a vascular leiomyoma originating from the left ovary.
Angiomyoma ; Autopsy ; Cystadenoma, Mucinous ; Female ; Gynecological Examination ; Humans ; Leiomyoma* ; Middle Aged ; Ovary ; Pathology, Surgical

Cystadenoma ; diagnosis ; Genital Neoplasms, Male ; diagnosis ; Humans ; Male ; Middle Aged ; Seminal Vesicles ; pathology

Papillary cystadenoma of the epididymis is a rare benign tumor, accounting for only 4 per cent of all epididymal tumors. Histologically, it can be confused with metastatic renal cell carcinoma. This extremely rare lesion may occur sporadically or as a manifestation of von Hippel-Lindau(VHL) disease. The present paper reported a case of papillary cystadenoma accompanied by testicular atrophy with no signs of VHL syndrome or infertility. To date, no similar case was reported in the literature. The tumor measured 5.0 cm x 4.0 cm x 4.0 cm and was located in the right epididymis. Histopathologic examination of a surgically removed specimen indicated a primary papillary cystadenoma. Histomorphologically, these tumors are characterized by cysts with colloid-like contents and papillary formations of light epithelium. Since metastatic renal cell carcinoma may be histologically similar to papillary cystadenoma, the importance of long-term urologic follow-up for possible presentation of renal cell carcinoma is discussed.
Adult ; Atrophy ; etiology ; Cystadenoma, Papillary ; complications ; pathology ; Epididymis ; Genital Neoplasms, Male ; complications ; pathology ; Humans ; Male ; Testis ; pathology