Cytomorphological effects of mitomycin C on urothelial cells: eosinophils may be clue to the drug-induced changes

Cytomorphological changes of mitomycin C on urothelial cells may be misinterpreted as a neoplastic process. A 60-year old male patient who was given an eight-week course of intravesical mitomycin C due to non-invasive low grade transitional cell carcinoma. During his follow-up care, the findings of a urine cytology exam were as follows: nuclear enlargement of cells, wrinkled nuclear membranes, little hyperchromasia, pleomorphism, abnormal nuclear morphology and disordered orientation of the urothelium. Furthermore, there were eosinophils nearby the atypical cells. This report aimed at reminding the cytomorphologic changes of mitomycin C may be misinterpreted as carcinoma, so the presence of eosinophils is required to predict the drug-induced changes

Cytological diagnosis of small cell carcinoma of urinary bladder in a patient with CLL

Small cell carcinoma of the urinary bladder [SCCUB] is an extremely rare bladder malignancy characterized by an aggressive clinical behavior. So, it is important to diagnose this high grade disease by urinary cytology. We report a case of SCCUB in an old man with chronic lymphocytic leukemia [CLL] in remission, while bladder tumor was diagnosed by cytology. With this article, we aimed to review and to update the literature concerning this tumor.