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Acta Cytol. 2009 Jul-Aug;53(4):467-70.

A diagnostic pitfall of fine needle aspiration cytology in testicular papillary serous cyst adenoma: a case report.

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Department of Pathology, Cancer Research Institute, Shiraz Medical School, Shiraz, Iran.



Testicular neoplasmns resembling ovarian serous tumors are rarely reported. We describe the first fine needle aspiration biopsy (FNAB) finding of this type of tumor.


A 35-year-old man presented with an enlarged right testis. Based on clinical observation, we hypothesized that it was a malignant tumor. FNA cytology findings revealed numerous papillary clusters, glandular-like structures and many isolated round cells. Metastatic papillary adenocarcinoma was suspected based on FNAB cytology. A right radical orchiectomy was performed, and histologic tissue examination was used to diagnose the tumor as a benign papillary serous cystadenoma.


Papillary serous cystadenoma of the testis is a rare tumor. The cytologic findings of this tumor are confusing and difficult to diagnose. Clusters of epithelial cells with a high nuclear to cytoplasm ratio are mistaken for features of a malignant tumor.

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