Focal pancreatitis mimicking pancreatic mass: magnetic resonance imaging (MRI)/magnetic resonance cholangiopancreatography (MRCP) findings including diffusion-weighted MRI.
Acta Radiol
; 49(5): 490-7, 2008 Jun.
Article
em En
| MEDLINE
| ID: mdl-18568532
ABSTRACT
BACKGROUND:
Focal pancreatitis (FP) is a confined inflammation that mimics a pancreatic mass. Its imaging diagnosis is important to avoid unnecessary procedures.PURPOSE:
To describe the spectrum of magnetic resonance imaging (MRI)/magnetic resonance cholangiopancreatography (MRCP) and diffusion-weighted MRI (DWI) findings of focal pancreatitis mimicking pancreatic masses. MATERIAL ANDMETHODS:
Findings of MRI/MRCP including DWI with a b value of 0 and 600 s/mm(2) in 14 patients with pancreatic masses on MRI were retrospectively reviewed and compared to normal pancreas in 14 patients as a control group.RESULTS:
FP revealed hypointense signal intensity (SI) (3/14), hypo- to isointense SI (7/14), or isointense SI (4/14) on T1-weighted images, and hypointense SI (1/14), isointense SI (5/14), iso- to hyperintense SI (7/14), or hyperintense SI (1/14) on T2-weighted images compared to remaining pancreas (RP). MRCP images revealed dilatation of the common bile duct (CBD) and main pancreatic duct (MPD) (5/14), dilatation of the MPD only (3/14), dilatation of the CBD only (3/14), and normal MPD and CBD (3/14). Both FP and RP revealed three types of time-signal intensity curves 1) rapid rise to a peak, with a rapid decline (FP=2, RP=4), 2) slow rise to a peak, followed by a slow decline (FP=5, RP=4), and 3) slower rise to a peak, with a slow decline or plateau (FP=7, RP=6). Mean apparent diffusion coefficient (ADC) values for FP and RP were 2.09+/-0.18 and 2.03+/-0.2 x 10(-3) mm(2)/s, respectively. ADC values of FP and RP revealed no significant difference.CONCLUSION:
The spectrum of imaging findings of focal pancreatitis on MRI/MRCP including DWI was described. Findings of FP were not distinctive as compared to the remaining pancreas.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pâncreas
/
Neoplasias Pancreáticas
/
Pancreatite
/
Imageamento por Ressonância Magnética
/
Colangiopancreatografia por Ressonância Magnética
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Acta Radiol
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos