The study investigated whether leiomyomas in grey seals, collected during the period of decreased levels of organo-chlorines, were in a regressive phase; and whether the period of increased levels of organo-chlorines caused the leiomyomas to proliferate. In addition, in vitro studies were conducted to characterise the growth control mechanism of grey seals leiomyoma cells.
Britt-Marie Backlin, L. Eriksson and M. Olovsson. Histology of uterine leiomyoma and occurrence in relation to reproductive activity in the Baltic grey seal (halichoerus grypus). Veterinary Pathology : accepted for publication