The precise incidence of metastatic involvement of bone in carcinoma of the uterine cervix is unknown. The reported total incidence varies in different studies but tends to be low. In the author's experience bony metastasis occurs more frequently than is generally recognised. In this study all the cases of cervical cancer treated in one hospital over a period of two consecutive years have been analysed In this respect. Bone secondaries were discovered in 16%. The possible factors influencing secondary spread to bone are discussed, and of these the degree of histological differentiation was found to be the most important.