- Genital lentigines in a 6-year-old boy with a family history of Cowden's disease: clinical and genetic evidence of the linkage between Bannayan-Riley-Ruvacalba syndrome and Cowden's disease. Blum, R.R., Rahimizadeh, A., Kardon, N., Lebwohl, M., Wei, H. Journal of cutaneous medicine and surgery. (2001)