Diagnostic Usefulness of PET/CT for Pancreatic Malignancy / 대한소화기학회지
The Korean Journal of Gastroenterology
;
: 235-242, 2009.
Article
in Korean
| WPRIM
| ID: wpr-89310
ABSTRACT
BACKGROUND/AIMS:
The purpose of this study was to evaluate the diagnostic usefulness of PET/CT for pancreatic malignancy.METHODS:
We retrospectively analyzed medical records of 115 patients with pathologically diagnosed pancreatic cancer between January 2003 to August 2008 who underwent abdominal CT and PET/CT examination before histological confirmation. CT and PET/CT images were reviewed in single-blinded status and diagnostic ability on primary pancreatic lesion, regional lymph node metastasis, and distant metastasis was evaluated.RESULTS:
99 patients (86%) had malignant diseases including 91 cases of adenocarcinoma, and 16 patients (14%) benign diseases. Only CA 19-9 value and SUV were significantly different between PET/CT positive and negative groups (p=0.001, p<0.001). Sensitivity, specificity and positive predictive values (PPV) of both modality for pancreatic lesion were same (94%, 62%, and 95%, respectively), and negative predictive values (NPV) were 67% on CT and 57% on PET/CT. PET/CT correctly diagnosed 8 cases (6.9%) of falsely diagnosed pancreatic lesion on CT. Nine cases (15.7%) of misdiagnosed lymph node metastasis on CT were correctly diagnosed on PET/CT. But, there was no significant difference in the diagnosis of regional lymph node metastasis. 3 out of 29 cases of distant metastasis, except 2 cases of supraclavicular lymph node metastasis, were additionally diagnosed by PET/CT. But, overall sensitivity of distant metastasis was significantly higher in CT (83% vs 69%, p=0.045).CONCLUSIONS:
Although PET/CT provided additional correct diagnoses in many cases, it showed fair diagnostic power for primary pancreatic lesion and lymph node metastasis, and lower sensitivity for distant metastasis. Therefore, PET/CT should be used as an supplementary modality of CT in diagnosing pancreatic malignancy.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pancreatic Neoplasms
/
Tomography, X-Ray Computed
/
Retrospective Studies
/
CA-19-9 Antigen
/
Positron-Emission Tomography
/
Diagnostic Errors
/
Lymphatic Metastasis
Type of study:
Diagnostic study
/
Observational study
/
Prognostic study
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Language:
Korean
Journal:
The Korean Journal of Gastroenterology
Year:
2009
Type:
Article
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