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Solid non-functioning endocrine tumors of the pancreas: correlating computed tomography and pathology
Giulia A Zamboni1, Maria Chiara Ambrosetti1, Caterina Zivelonghi1
1Istituto di Radiologia, DAI Patologia e Diagnostica, Policlinico GB Rossi, AOUI Verona, Verona, Italy.
Summary
Contrast-enhanced multidetector computed tomography (MDCT) can help differentiate pancreatic endocrine tumor (pNET) grades. Features like size, homogeneity, and enhancement patterns correlate with tumor grade, aiding in patient management.
Area of Science:
- Radiology
- Oncology
- Pathology
Background:
- Pancreatic endocrine tumors (pNETs) prognosis and treatment depend on tumor grade.
- Solid non-functioning pNETs require accurate grading for optimal patient care.
Purpose of the Study:
- To correlate contrast-enhanced multidetector computed tomography (MDCT) features of solid non-functioning pNETs with their pathology tumor grading.
- To assess the utility of MDCT in differentiating pNET grades.
Main Methods:
- Retrospective review of MDCTs from 154 diagnosed pNETs with available histology.
- Analysis of tumor characteristics including size, homogeneity, enhancement patterns, vascular invasion, and metastases.
- Correlation of imaging findings with histological tumor grades (G1, G2, G3).
Main Results:
- Tumor diameter, homogeneity, and arterial phase enhancement varied significantly with tumor grade.
- Tumors >20 mm were more frequently malignant and non-homogeneous.
- G3 tumors showed specific characteristics like larger size, non-hypervascularity, and increased vascular invasion.
- Arterial phase non-hyperdensity and tumor non-homogeneity correlated with a higher rate of metastatic lesions.
Conclusions:
- MDCT findings correlate with pNET tumor grade.
- Routine CT imaging can potentially differentiate low-grade from high-grade pNETs.
- Improved differentiation through CT may enhance patient management strategies.
