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Intrapancreatic accessory spleen: Evaluation with CT and MRI
Qianjiang Ding1, Zhihao Ren1, Jianhua Wang1
1Department of Radiology, The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China.
Experimental and Therapeutic Medicine
|September 26, 2018
Summary
Intrapancreatic accessory spleen (IPAS) imaging characteristics on CT and MRI, including diffusion-weighted imaging (DWI), are similar to the orthotopic spleen. These imaging modalities are crucial for diagnosing IPAS.
Area of Science:
- Radiology
- Medical Imaging
- Gastroenterology
Background:
- Intrapancreatic accessory spleen (IPAS) is a rare congenital anomaly.
- Accurate imaging is essential for differentiating IPAS from other pancreatic pathologies.
Purpose of the Study:
- To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) characteristics of IPAS.
- To assess the utility of diffusion-weighted imaging (DWI) in IPAS diagnosis.
Main Methods:
- Retrospective review of clinical and pathological records of 9 patients (8 IPAS, 1 splenosis).
- Analysis of plain and triple-phase enhanced CT scans (n=9) and MRI scans (n=8).
- Evaluation of diffusion-weighted imaging (DWI) findings in 5 IPAS patients.
Main Results:
- IPAS lesions in the pancreatic tail showed CT/MRI characteristics similar to the orthotopic spleen.
- IPAS demonstrated high signal intensity on DWI with no significant difference in apparent diffusion coefficient compared to the spleen.
- Splenosis showed inconsistent MRI signals compared to the normal spleen, except for dynamic enhancement patterns.
Conclusions:
- IPAS exhibits imaging features comparable to the orthotopic spleen on pre- and post-contrast CT and MRI.
- Combined CT, MRI, and DWI are valuable tools for the diagnosis of IPAS.
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