- The Wnt pathway, epithelial-stromal interactions, and malignant progression in phyllodes tumours. Sawyer, E.J., Hanby, A.M., Rowan, A.J., Gillett, C.E., Thomas, R.E., Poulsom, R., Lakhani, S.R., Ellis, I.O., Ellis, P., Tomlinson, I.P. J. Pathol. (2002)