2006 年 45 巻 6 号 p. 346-347
We report cytological features in a case of ovarian transitional cell carcinoma. A 60-year-old woman seen for irregular genital bleeding was found in MRI to have a left ovarian tumor accompanying ascites. The uterus and bilateral ovaries were resected. Cytological examination of ascites showed many small round or oval cells with a relatively high N/C ratio and conspicuous irregular nuclei as clusters or single cells. The average nuclear size of 50 nuclei was 9μm on the long axis and 6.4μm on the short axis. Our case underlines the need to consider the possibility of ovarian transitional cell carcinoma when observing the cytological features described above in ascitic smears.