F i g . 1 a :Ab d o mi n a l u l t r a s o n o g r a p h i e s s h o wi n g a l o w e c h o i c a r e a s i z e d 5 . 6 c m×4 . 8 c m b e h i n d t h e c ec u m (a r r o w) . b :Th e r o o t o f t h e a p p e n d i x i s s h o wn i n s i d e a l o w e c h o a r e a (a r r o w) .
Anatomicalvariationsofmesentericarteriesareuncommon,andamongthose,duplicationofthesuperiormesentericartery(SMA)hasseldombeenreported.WereportararecaseofSMAduplicationand incompleteintestinalmalrotationina57-year-oldJapanesemanwithearlyrectalcancer(15mminsize, 0-IIa+IIctype)diagnosedinacolorectalcancerscreening,togetherwithreviewoftheliterature. Preoperative contrast enhanced computed tomography revealed two SMAs, though there were no distantandlymphnodemetastases.ThefirstSMAhadarisenfromtheabdominalaortaatitsusualdistancefromtheceliacarteryandgavebranchestothejejunum.ThesecondSMAhadoriginatedfromthe inferiormesentericartery(IMA),ranupward,andthenturnedcounter-clockwiseanddownwardgiving risetobranchestotherightcolonandtheileum.Itappearedthatthe1 st SMAmightfeedthejejunum andthe2 nd SMA,theileumandtherightcolon.Incompleteintestinalmalrotationof180degreeswasalso visualized. LaparoscopicanteriorresectionpreservingtherootofIMA,the2 nd SMAandtheleftcolicarterywas performed,andthepostoperativecoursewasuneventful.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.