Laboratory Animals (1982) 16,281-284 Endometriosis in rhesus monkeys

found in a colony of 3S females, which had under-gone in the past X-ray treatment or one or more Caesarean sections and/or one or more treatments with gonadal steroids. Incidence, pathogenesis, clinical symptoms, histology and treatment are described. Endometriosis is the presence of viable endo-metrium in ectopic sites outside the uterine cavity. It occurs only in those species which menstruate, namely primates (King, 1978). In our colony of 35 female rhesus monkeys 9 cases of endometriosis were found. Incidence, pathogenesis, clinical features, pathological signs and treatment are presented in this paper. Materials and methods 35 female rhesus monkeys were involved in this study. All but one were wild-caught. They were housed individually in wire squeeze cages measuring