Multiple enteric muco-submucosal elongated polyps causing intussusception.

Area of Science:

• Gastroenterology
• Pathology
• Surgical Oncology

Background:

• Intestinal polyps are growths in the gastrointestinal tract, varying in neoplastic potential.
• Muco-submucosal elongated polyps (MSEP) are typically non-neoplastic and historically reported in the colon.
• Small intestinal polyps, especially multiple lesions causing obstruction, are less commonly documented.

Observation:

• A 20-year-old female presented with abdominal pain and was diagnosed with multiple upper jejunal masses.
• Computed tomography identified masses suspected as lipomas, leading to surgical resection due to intussusception.
• Pathological analysis revealed the masses were muco-submucosal elongated polyps (MSEP), characterized by mucosal and edematous submucosal tissue with vascular and lymphatic dilation.

Findings:

• The jejunal masses were definitively diagnosed as multiple muco-submucosal elongated polyps (MSEP), a non-neoplastic entity.
• These MSEPs were identified as the cause of intussusception, leading to small bowel obstruction.
• The case represents a rare instance of multiple MSEPs occurring in the jejunum and inducing intussusception.

Implications:

• This case expands the known anatomical distribution of MSEP beyond the colon to the small intestine, specifically the jejunum.
• Understanding the pathogenesis of jejunal MSEP is crucial for accurate diagnosis and management of intussusception.
• Further research into similar cases can elucidate the mechanisms by which these polyps cause intestinal intussusception.