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Intrahepatic peripheral cholangiocarcinoma: two-phased dynamic incremental CT and pathologic correlation
H Honda1, H Onitsuka, K Yasumori
1Department of Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Journal of Computer Assisted Tomography
|May 1, 1993
Summary
Characteristic computed tomography (CT) findings for intrahepatic peripheral cholangiocarcinoma were identified. Most tumors appeared hypodense on early phase CT scans and showed increased density on delayed images, with irregular margins.
Area of Science:
- Radiology
- Oncology
- Hepatobiliary Surgery
Background:
- Intrahepatic peripheral cholangiocarcinoma is a challenging diagnosis.
- Accurate imaging is crucial for early detection and treatment planning.
Purpose of the Study:
- To define the typical computed tomography (CT) features of intrahepatic peripheral cholangiocarcinoma.
- To differentiate this entity from other liver lesions.
Main Methods:
- Analysis of two-phased dynamic incremental CT scans in 16 patients with 20 intrahepatic peripheral cholangiocarcinomas.
- Scans were performed after intravenous contrast administration, with early (45-110s) and delayed (6-7 min) phase imaging.
Main Results:
- 55% of tumors were hypodense in both phases; 80% were hypodense in the early phase and enhanced in the delayed phase.
- Irregular or indistinct tumor margins were consistently observed.
- Lymphadenopathy was present in 69% of patients with tumors >3 cm.
- 20% of tumors were difficult to distinguish from hepatocellular carcinoma or hemangioma.
Conclusions:
- Two-phased dynamic incremental CT provides characteristic findings for intrahepatic peripheral cholangiocarcinoma.
- Delayed phase enhancement and irregular margins are key indicators.
- Distinguishing from other liver tumors can be challenging in a subset of cases.