Increased concentration of vascular endothelial growth factor/vascular permeability factor in cyst fluid of enlarging and recurrent thyroid nodules. - Sato,K.; Miyakawa,M.; Onoda,N.; Demura,H.; Yamashita,T.; Miura,M.; Kasajima,T.; Yamazaki,K.; Obara,T. (J Clin Endocrinol Metab, 1997)