Unusual presentation of a pancreatic insulinoma in helical CT and dynamic contrast-enhanced MR imaging: case report.
Insulinomas are pancreatic neoplasms that can be radiologically characterized typically because of their tendency to present intense and early contrast enhancement with a wash-out phenomenon. In this sense, we report an unusual case of a hypovascular solid pancreatic insulinoma confirmed with surgery and pathologic analysis, in a patient with normal serum insulin levels. In the two-phase helical CT, the mass behaved as a hypodense lesion with respect to the surrounding pancreatic parenchyma during the arterial phase and as a hypointense lesion during the dynamic contrast-enhanced MR imaging. Pathologic examination demonstrated a hypercellular tumor with poor vascularization of intervening stroma which showed prominent amyloid deposits.
Iglesias
A
A
Unidad de Resonancia Magnetica (Medtec), Hospital Xeral-Cíes, 36204 Vigo, Spain.
Arias
M
M
Casal
M
M
Páramo
C
C
Fiaño
C
C
Brasa
J
J
D000368:Aged; D000792:Angiography; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007340:Insulinoma / Q000098:blood supply / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D010179:Pancreas / Q000098:blood supply / Q000473:pathology; D010190:Pancreatic Neoplasms / Q000098:blood supply / Q000175:diagnosis* / Q000473:pathology; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed