Abstract
We report herein on a case of prostatic duct adenocarcinoma in a 74-year-old man, who presented with urinary retention. A cytology specimen obtained by catheterization showed loose clusters or aggregates composed of small round to oval cells. These cells revealed fine chromatin with prominent nucleoli. A TUR-P specimen revealed adenocarcinoma with a papillary pattern. The immunohistochemical analysis revealed that these tumor cells were positive for PSA and PAP. Although it is rare, prostatic duct adenocarcinoma cells can be observed in urine specimens, therefore it should be kept in mind as a differential diagnosis. In addition, immunohistochemistry may be useful for such differential diagnoses.
