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The blood supply of the abdominally-placed vertical sigmoid colon
Insights
This study details the blood supply to a high sigmoid loop, noting its origin from left colic and sigmoid arteries. An accessory middle colic artery, arising from the dorsal pancreatic artery, was also observed in this retroperitoneal case.
Area of Science:
- Anatomy
- Vascular Anatomy
- Surgical Anatomy
Background:
- Understanding the vascular supply of the sigmoid colon is crucial for surgical procedures.
- Variations in the arterial supply can impact surgical planning and outcomes.
Observation:
- The blood supply to a high or subsplenic sigmoid loop was identified originating from the left colic and first sigmoid arteries.
- An accessory middle colic artery was observed originating from the dorsal pancreatic artery.
Findings:
- The accessory middle colic artery crossed superior to the apex of the sigmoid loop.
- The high sigmoid loop was retroperitoneal, potentially making it difficult to identify without specific radiographic views.
Implications:
- This detailed anatomical description aids surgeons in recognizing and managing variations in sigmoid colon vascularity.
- Awareness of retroperitoneal sigmoid loops and their arterial supply is vital for preventing intraoperative complications.
Abstract:
We have recorded the blood supply to a high or subsplenic sigmoid loop from branches of the left colic and first sigmoid arteries. An accessory middle colic present in this case crossed the region immediately superior to the apex of the sigmoid loop. In this instance it arose from the dorsal pancreatic which also gave origin to inferior pancreaticoduodenal branches. Since the high sigmoid may be retroperitoneal, as in the case described, it would not be readily apparent; it would require lateral views to separate it from the descending colon radiographically.