However, in our patient, positive serology results for both Echinococcus species suggested radical excision of both lesions, from which, in the sample taken from the distal cyst, E. multilocularis was clearly proven by sequencing the nad1, COI, and 12SrRNA genes, while E. granulosus sensu stricto was confirmed in the three samples collected from the proximal cyst by sequencing the COI and ATP6 genes. The gene discussed is MT-CO1; the disease is cyst.