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A peroperative comparison of Western and Oriental colonic anatomy and mesenteric attachments

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Abstract

It has been suggested that the Oriental colon is easier to colonoscope than its Western counterpart. The aim of this study was to investigate possible differences in colonic anatomy between Western and Oriental patients that might explain this observation. Measurements of colonic length and mesenteric attachments were taken according to a set protocol from 115 Western (Caucasian) and 114 Oriental patients at laparotomy. Sigmoid adhesions were found more frequently in Western (17%) compared to Oriental (8%) patients, P=0.047. A descending mesocolon of ≥10 cm occurred in 10 (8%) Western patients but only 1 (0.9%) Oriental patient, P=0.01. The splenic flexure was more frequently mobile in Western patients (20%) compared to Oriental (9%) patients, P=0.016. In 29% — of Western patients the mid-transverse colon reached the symphysis pubis, or lower when pulled downwards in contrast to 10% of Oriental patients, P<0.001. There was no significant difference in total colonic length comparing Western (median=114 cm, range 68–159 cm) to Oriental (median=111 cm, range 78–161 cm) patients. Western patients have a higher incidence of sigmoid colon adhesions and increased colonic mobility when compared to Orientals. These findings support the observation that colonoscopy is a more difficult procedure in Western patients.

Résumé

On a suggéré qu'il est plus facile de colonoscoper le côlon de sujets orientaux que celui de sujets occidentaux. Le but de cette étude est d'investiguer des éventuelles différences dans l'anatomie du côlon chez des sujets occidentaux et orientaux qui puissent expliquer cette constatation. Des mesures de la longueur du côlon et des attaches mésentériques ont été relevées selon un protocole établi chez 115 occidentaux (caucasiens) et 114 patients orientaux au cours de laparotomie. Les adhérences sigmoïdennes ont été trouvées plus fréquemment chez les sujets occidentaux (17%) en comparaison aux orientaux (8%), P=0.047: Un méso-côlon descendant de ≥10 cm survient chez 10 (8%) des sujets occidentaux mais chez seulement 1 (0,9%) des sujets orientaux (P=0.01). L'angle splénique est plus fréquemment mobile chez les occidentaux (20%) comparativement aux orientaux (9%), P=0.016. Chez 29% des patients occidentaux, le côlon transverse atteint la symphyse du pubis ou descend même plus bas à la traction en comparaison à 10% des sujets orientaux (P<0,001). Il n'y a pas de différence significative dans la longueur totale du côlon en comparant les sujets occidentaux (de 68 à 159 cm, médiane=114 cm) en comparaison aux orientaux (78 à 161 cm, médiane=111 cm). Les patients occidentaux ont donc une incidence plus élevée d'adhérence du côlon sigmoïde et une mobilité colique augmentée en comparaison aux orientaux. Ces constatations expliquent l'observation d'une difficulté plus grande à réaliser une colonoscopie chez des sujets occidentaux.

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Saunders, B.P., Masaki, T., Sawada, T. et al. A peroperative comparison of Western and Oriental colonic anatomy and mesenteric attachments. Int J Colorect Dis 10, 216–221 (1995). https://doi.org/10.1007/BF00346222

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