STEROID RECEPTORS AND CALPONIN EXPRESSION IN AN UTERINE LEIOMYOMAOF A FATTENING PIG

摘要

The prevalence of uterine leiomyomas in swine is rare and depending of the age of the population studied. , Thus, an increment of prevalence has been observed in Vietnamese pot-belied pig, popularity animals as pets with 5 to 10 years of age (1,2). Inswine, a prevalence of 0.4 % in pigs with a mean age of four years has been described (2). To the authors knowledge only a case of uterine leiomyoma has been reported in fattening pig (3). Calponin is a highly sensitive marker of smooth muscle differentiation in human neoplasm (4) and has been used with positive results in tumors from dog and cat (5, 6). Estrogen and progesterone appear to be promoters of genital tract leiomyoma growth (7, 8) and estrogen receptors (ERs) and progesterone receptors (PRs) has been reported in human, feline and canine leiomyomas of the genital tract (4, 6). To the knowledge of authors the first case of uterine cervix leiomyoma of fattening pig that expressed calponin and steroid receptor were report.