CD68 and ovarian carcinoma: This result is consistent with a previous study showing that the simultaneous infiltration of tumours by different subsets of leucocytes (e.g. T cells, plasma cells, B cells), likely reflecting the establishment of a concerted immune response, gives a survival advantage to ovarian cancer patients.5 We used the PCs to model survival and found that a model including PC1 and PC5 was as predictive as individually modelled stromal CD45RO and CD68 infiltrates.