Synchronous Neoplasms of the Small Bowel: A Diagnostic Challenge

Area of Science:

• Gastroenterology
• Oncology
• Surgical Pathology

Background:

• Small bowel tumors are rare, comprising only 0.5% of all cancers and 3% of gastrointestinal tumors.
• Adenocarcinoma is most common in the duodenum/jejunum, while carcinoid tumors are frequent in the ileum.
• Schwannomas, typically benign, are rarely found in the small intestine, and even rarer synchronously with other tumor types.

Purpose of the Study:

• To report a rare case of synchronous small bowel tumors.
• To highlight the diagnostic challenges and management of rare synchronous gastrointestinal neoplasms.
• To emphasize the need for further research into the pathophysiology of synchronous tumors.

Main Methods:

• Case presentation of an 86-year-old female with high intestinal subocclusion.
• Diagnostic identification of two synchronous lesions: duodenal adenocarcinoma and ileal schwannoma.
• Surgical resection of both identified small bowel tumors.

Main Results:

• The patient presented with symptoms of intestinal subocclusion, vomiting, and weight loss.
• Two distinct synchronous tumors were found in the small intestine: an adenocarcinoma and a schwannoma.
• Both lesions were successfully surgically resected.

Conclusions:

• Small bowel neoplasms are rare, clinically non-specific, and difficult to diagnose.
• The pathophysiology of synchronous gastrointestinal schwannomas with other histological subtypes requires further investigation.
• A multidisciplinary approach is essential for timely diagnosis and improved outcomes in managing rare small bowel tumors.