Small Bowel Neuroendocrine Neoplasms-A Review

Area of Science:

• Oncology
• Gastroenterology
• Radiology

Background:

• Small bowel neuroendocrine neoplasms (SB-NENs) are rare tumors that present asymptomatically, often with metastases.
• Understanding the molecular and histological characteristics of SB-NENs is crucial for diagnosis and treatment.

Purpose of the Study:

• To provide a comprehensive review of small bowel neuroendocrine neoplasms (SB-NENs).
• To detail the molecular, histological, and imaging features relevant for diagnosis and therapy guidance.

Main Methods:

• Review of current literature on SB-NENs.
• Analysis of molecular mechanisms, including somatic cell number alterations and epigenetic mutations.
• Evaluation of histological findings, grading, and rare variants.
• Assessment of conventional and advanced imaging techniques (CT, MRI, CECT, PET) for diagnosis, staging, and follow-up.
• Discussion of therapeutic imaging modalities like peptide receptor radionuclide therapy.

Main Results:

• SB-NENs exhibit diverse molecular underpinnings, including somatic mutations and epigenetic changes.
• Histological grading and identification of rare mixed tumors are essential for classification.
• Advanced imaging modalities play a critical role in diagnosing, staging, and monitoring SB-NENs.
• Peptide receptor radionuclide therapy represents a key therapeutic application of imaging.

Conclusions:

• Accurate diagnosis and staging of SB-NENs rely on integrating molecular, histological, and advanced imaging data.
• Personalized therapeutic strategies, informed by imaging, are crucial for managing SB-NENs.
• Further research into the molecular basis and therapeutic applications of imaging in SB-NENs is warranted.