- Molecular characteristics of poorly differentiated adenocarcinoma and signet-ring-cell carcinoma of colorectum. Kawabata, Y., Tomita, N., Monden, T., Ohue, M., Ohnishi, T., Sasaki, M., Sekimoto, M., Sakita, I., Tamaki, Y., Takahashi, J., Yagyu, T., Mishima, H., Kikkawa, N., Monden, M. Int. J. Cancer (1999)