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Small bowel neoplasms: enhancement patterns and differentiation using post-contrast multiphasic multidetector CT.

Takayoshi Shinya¹, Ryota Inai², Takashi Tanaka²

¹Department of Radiology, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan. midnight-2005@nifty.com.

Abdominal Radiology (New York)

|October 27, 2016

Summary

Multiphasic multidetector CT enhances small bowel neoplasm diagnosis. Different tumor types show distinct enhancement patterns, improving differentiation accuracy for gastrointestinal stromal tumors (GIST), neuroendocrine tumors (NET), and others.

Keywords:

Attenuation value Differential diagnosis Enhancement pattern Multiphasic computed tomography Small bowel neoplasm

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Area of Science:

Radiology
Oncology
Gastroenterology

Background:

Small bowel neoplasms are challenging to diagnose using imaging.
Multidetector CT (MDCT) is a key imaging modality for evaluating abdominal pathologies.
Differentiating various small bowel tumor types pre-operatively remains a clinical challenge.

Purpose of the Study:

To analyze enhancement patterns of small bowel neoplasms using post-contrast multiphasic MDCT.
To assess the diagnostic capability of MDCT in differentiating five common small bowel tumor types.

Main Methods:

Retrospective analysis of 92 small bowel neoplasms.
Tumor categorization based on pathology: adenocarcinoma, lymphoma, metastasis, gastrointestinal stromal tumors (GIST), and neuroendocrine tumors (NET).
Evaluation of enhancement patterns on multiphasic dynamic CT scans.

Main Results:

Gastrointestinal stromal tumors (GIST) and neuroendocrine tumors (NET) exhibited hypervascular enhancement.
Adenocarcinoma and lymphoma showed delayed enhancement patterns.
Metastases presented with intermediate enhancement patterns, with acceptable accuracy for differentiation.

Conclusions:

Multiphasic dynamic CT studies show potential in improving diagnostic accuracy for small bowel neoplasms.
Enhancement patterns on MDCT can aid in differentiating between various small bowel tumor types.
Further research can refine CT-based diagnostic criteria for small bowel tumors.