[Lithopedion in cervical pregnancy: a case report].

One clinical case of cervical pregnancy studied, at the Hospital Regional ISSSTE in Acapulco, Guerrero, México, is presented. Clinically it was manifested as a true cervical pregnancy, with intermittent vaginal bleeding, fetid leukorrhea and slight pelvic pain. Literature reveals that diagnosis is rarely, if ever made, except by direct observation of the cervix. The case fulfills the Rubin's criteria for cervical pregnancy. Cervical pregnancy is extremely rare as evidenced by the paucity of cases in literature. Although it is an abnormal gestation, cervical pregnancy and a lithopedion formation makes this report rare and unique in world literature.