Cytological findings of ascites. (a) Papanicolaou stain of ascites on 9 February 2007 (before treatment). Carcinoma cells varying in size with prominent nucleoli form papillary pattern clusters. (b) Papanicolaou stain of ascites on 18 April 2007 (after treatment). Most of the infiltrates are small lymphocytes and carcinoma cells are not present. Cell surface marker analysis indicated that most of the cells were CD4- and CD3-positive T cells (data not shown).