Fatal Sigmoidorectal Intussusception Associated With a Colonic Vascular Lesion Showing AVM-Like Features: A Rare Case
Hind Abouzahir1,2, Siham Nagib1,3, Barthelemy Munkana Matadi2
1Hassan II University Faculty of Medicine and Pharmacy, Casablanca, Morocco.
The American Journal of Forensic Medicine and Pathology
|June 24, 2026
Summary
A rare case of fatal adult intussusception occurred in the rectosigmoid colon due to an arteriovenous malformation (AVM). This highlights vascular lesions as potential lead points in adult intussusception, even without malignancy.
Area of Science:
- Gastroenterology
- Pathology
- Vascular Surgery
Background:
- Intussusception, the telescoping of bowel segments, is rare in adults and typically linked to neoplasms.
- Colonic intussusception is less common, and arteriovenous malformations (AVMs) are an unusual cause.
- Fatal rectosigmoid intussusception due to AVMs has not been previously reported.
Purpose of the Study:
- To report a unique case of fatal adult rectosigmoid intussusception.
- To identify the etiology of the intussusception.
- To emphasize the role of vascular lesions in adult intussusception.
Main Methods:
- Case report of a 41-year-old male with sudden severe abdominal pain.
- Autopsy and histopathologic analysis of the gastrointestinal tract.
- Identification of a colo-recto-sigmoid intussusception with an intraluminal mass.
Main Results:
- The intussusception was caused by a vascular lesion with arteriovenous malformation (AVM)-like features.
- No malignancy was identified as the lead point.
- The patient presented with cardiac arrest following rapid deterioration.
Conclusions:
- Adult intussusception can be caused by colonic vascular lesions, such as AVMs.
- Vascular malformations should be considered as potential lead points in adult intussusception.
- This case represents a fatal instance of rectosigmoid intussusception due to AVMs.
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