The frequency and the arterial branches of the colosigmoind arterial trunk

Our results were obtained on a total of 101 cases and the presence of the colosigmoid trunk was encountered in 54.46% of cases, with seven types of branching variation. We were able to compare our results with those of Lippert, noticing that the classical anatomy only mentions (without details) the presence of the colosigmoid trunk, while other authors do not even mention it. The anatomical variations of the colosigmoid arterial trunk are: 1. from the colosigmoid trunk originate the left colic artery and a sigmoid trunk that gives origin to all three sigmoid arteries (14.85% of cases); 2. from the colosigmoid trunk originate the left colic and the superior sigmoid arteries (18.81% of cases); 3. from the colosigmoid trunk originate the left colic artery and a sigmoid trunk that give origin to two sigmoid arteries, superior and inferior, an aspect found in 4.95% of cases; 4. a colosigmoid trunk that give rise to the inferior sigmoid artery and to a lower trunk that give the left colic artery and the superior sigmoid artery (5.94% of cases); 5. a colosigmoid trunk that give origin to the left colic, middle colic and superior sigmoid arteries in 5.94% of cases; 6. a colosigmoid trunk that splits into a colic branch which further gives origin to the left and middle colic arteries and into a sigmoid branch that will give the superior and inferior sigmoid arteries (1.98% of cases); 7. a colosigmoid trunk that gives origin to the middle colic artery (for the transverse colon), to the left colic and superior sigmoid arteries (1.98% of cases).