TIMP1 and carcinosarcoma: Histopathologic cell type was correlated to TIMP-1 immunoreactivity (p = 0.00004, χ2) with low percentage of TIMP-1 positive cases in serous (7.8%) and undifferentiated tumours (0%) compared to a higher rate of TIMP-1 positive tumours in endometrioid (18.2%, clear cell (20%), mucinous (55.6%) and carcinosarcomas (66.7%).