[Echinococcal cysts with primary muscle localization: comments on a clinical case].

Primary muscular localization of echinococcosis is rare and unknown are the causes that determine it. The authors report a case recently observed and illustrate the etiopathogenetic hypothesis more accredited in the literature. It is concluded that surgical treatment is the best choice, although relapses are possible. Therefore, a long term follow up of the patients including clinical and serological investigations is advisable.