[Experimental histological study of the local toxicity of intra-tubal injections of methotrexate]. / Etude histologique expérimentale de la toxicité locale de l'injection intratubaire de méthotrexate.

The injection of methotrexate is an alternative to laparoscopic surgical treatment of unruptured ectopic pregnancy. An experimental trial on rabbits was designed to evaluate this new approach. In situ injection of methotrexate does not cause either real tubal epithelial impairment, nor an adverse effect on treated rabbits' fertility. However, sub-peritoneal injections of methotrexate are responsible for a typical histological lesion. These results are discussed emphasising the importance of the way the administration is carried out.