No abstract available.
Aged ; Carcinoma, Hepatocellular/radiography/*secondary ; Gallbladder Neoplasms/radiography/*secondary ; Humans ; Liver Neoplasms/*pathology/radiography ; Male ; Tomography, X-Ray Computed

There is accumulating evidence that cancer stem cells (CSCs) play an integral role in the initiation of hepatocarcinogenesis and the maintaining of tumor growth. Liver CSCs derived from hepatic stem/progenitor cells have the potential to differentiate into either hepatocytes or cholangiocytes. Primary liver cancers originating from CSCs constitute a heterogeneous histopathologic spectrum, including hepatocellular carcinoma, combined hepatocellular-cholangiocarcinoma, and intrahepatic cholangiocarcinoma with various radiologic manifestations. In this article, we reviewed the recent concepts of CSCs in the development of primary liver cancers, focusing on their pathological and radiological findings. Awareness of the pathological concepts and imaging findings of primary liver cancers with features of CSCs is critical for accurate diagnosis, prediction of outcome, and appropriate treatment options for patients.
Bile Duct Neoplasms/pathology/radiography ; Bile Ducts, Intrahepatic/pathology/radiography ; Carcinoma, Hepatocellular/pathology/radiography ; Cholangiocarcinoma/pathology/radiography ; Humans ; Liver Neoplasms/*pathology/radiography ; Magnetic Resonance Imaging ; Neoplastic Stem Cells/*pathology/radiography ; Tomography, X-Ray Computed

OBJECTIVE: To evaluate the three-phase helical CT features of early hepatocellular carcinomas, based on the new Japanese classification. MATERIALS AND METHODS: Over the course of an eight-year period, we collected 16 pathologically proven early hepatocellular carcinomas from 16 patients having undergone a three-phase helical CT prior to surgery. The three-phase CT images were acquired at 20-35 sec (arterial phase), 70 sec (portal phase), and 180 sec (equilibrium phase) from the begining of intravenous injection of contrast material. All the CT images were retrospectively analyzed by two radiologists in consensus, based on their description of morphologic (size, margin, fibrous capsule and mosaic pattern) and enhancement patterns of tumors. RESULTS: Only seven (44%) of the 16 early hepatocellular carcinomas having undergone a CT were described (mean diameter, 1.2 cm; range, 0.4-2.5 cm). All the tumors had an ill-defined margin with no fibrous capsule. The mosaic pattern was found in only one tumor. Only three (43%) of the seven tumors detected on CT were hyperattenuating during the arterial phase. The four remaining tumors (25%) were hypoattenuating throughout the three phases. CONCLUSION: Despite the higher resolution provided by the three phase scans, the contrast-enhanced CT provides only limited detection of the variable morphologic and enhancement features of early hepatocellular carcinomas.
Adult ; Carcinoma, Hepatocellular/pathology/*radiography ; Female ; Humans ; Liver Neoplasms/pathology/*radiography ; Male ; Middle Aged ; Retrospective Studies ; *Tomography, Spiral Computed

No abstract available.
Adrenal Rest Tumor/pathology/*radiography/ultra ; Carcinoma, Hepatocellular/pathology/radiography/ultra ; Humans ; Liver Neoplasms/pathology/*radiography/ultra ; Male ; Middle Aged ; Tomography, X-Ray Computed

OBJECTIVE: To describe computed tomography (CT) features of metastatic gallbladder (GB) tumors (MGTs) from various primary tumors and to determine whether there are differential imaging features of MGTs according to different primary tumors. MATERIALS AND METHODS: Twenty-one patients who had pathologically confirmed MGTs and underwent CT were retrospectively enrolled. Clinical findings including presenting symptoms, type of surgery, and interval between primary and metastatic tumors were recorded. Histologic features of primary tumor and MGTs including depth of invasion were also reviewed. Imaging findings were analyzed for the location and morphology of MGTs, pattern and degree of enhancement, depth of invasion, presence of intact overlying mucosa, and concordance between imaging features of primary and metastatic tumors. Significant differences between the histologies of MGTs and imaging features were determined. RESULTS: The most common primary tumor metastasized to the GB was gastric cancer (n = 8), followed by renal cell carcinoma (n = 4) and hepatocellular carcinoma (n = 3). All MGTs (n = 21) manifested as infiltrative wall thickenings (n = 15) or as polypoid lesions (n = 6) on CT, similar to the features of primary GB cancers. There were significant differences in the morphology of MGTs, enhancement pattern, enhancement degree, and depth of invasion according to the histology of primary tumors (p < 0.05). Metastatic adenocarcinomas of the GB manifested as infiltrative and persistently enhancing wall thickenings, while non-adenocarcinomatous metastases usually manifested as polypoid lesions with early wash-in and wash-out. CONCLUSION: Although CT findings of MGTs are similar to those of primary GB cancer, they are significantly different between the various histologies of primary tumors.
Adenocarcinoma/pathology/radiography/secondary ; Adult ; Aged ; Carcinoma, Hepatocellular/pathology/radiography/secondary ; Carcinoma, Renal Cell/pathology/radiography/secondary ; Carcinoma, Squamous Cell/pathology/radiography/secondary ; Diagnosis, Differential ; Female ; Gallbladder Neoplasms/pathology/*radiography/*secondary ; Humans ; Kidney Neoplasms/pathology ; Liver Neoplasms/pathology ; Male ; Melanoma/pathology/radiography/secondary ; Middle Aged ; Neoplasm Invasiveness/radiography ; Retrospective Studies ; Stomach Neoplasms/pathology ; *Tomography, X-Ray Computed

No abstract available.
Carcinoma, Hepatocellular/*diagnosis/pathology ; Cholangiocarcinoma/*diagnosis/pathology ; Humans ; Liver Neoplasms/*diagnosis/pathology/radiography ; Male ; Middle Aged ; Neoplasms, Multiple Primary/*diagnosis/pathology/radiography ; Tomography, X-Ray Computed

Needle tract implantation of hepatocellular carcinoma (HCC) is a rare complication of percutaneous biopsy, and it is largely associated with end-cutting needles or aspiration biopsy. The CT findings that have been reported include oval or round soft tissue nodules with persistent contrast enhancement along the needle tract, mostly in the subcutaneous tissue or the intercostal muscle layers. In this report, we describe a case of needle tract implantation of HCC after US-guided percutaneous biopsy with an 18G tru-cut needle.
Adult ; Aged ; Biopsy, Needle/*adverse effects ; Carcinoma, Hepatocellular/radiography/*secondary ; Female ; Humans ; Liver Neoplasms/*pathology/radiography ; Male ; Middle Aged ; *Neoplasm Seeding ; Radiography, Abdominal ; Retrospective Studies ; Tomography, Spiral Computed

Budd-Chiari syndrome (BCS) is a disorder caused by occlusion of the hepatic vein or inferior vena cava. The clinical presentation include abdominal pain, hepatomegaly, ascites, leg edema, collateral venous dilatation of the body trunk, and portal hypertension. In addition, BCS can cause hepatocellular carcinoma (HCC) in some patients, although its pathogenesis is not yet completely understood. The average reported time lag from diagnosis of BCS to full-blown HCC ranges from several years to several decades. Hepatic carcinogenesis in patients with BCS perhaps reflects a prolonged and persistent liver injury in that it occurs in the primary inferior vena cava obstruction rather than the primary hepatic vein thrombosis. Among patients with BCS, membranous obstruction of the vena cava (MOVC) usually presents an insidious and chronic illness, whereas primary hepatic vein thrombosis presents an acute or subacute illness. We experienced a case of a patient with BCS, which progressed rapidly that HCC developed only nine months after the diagnosis of BCS. The factors causing this rapid progression are still unclear and remain to be investigated.
Adult ; Carcinoma, Hepatocellular/*etiology/pathology/radiography ; Disease Progression ; Fatal Outcome ; Female ; Hepatic Vein Thrombosis/*complications/pathology/radiography ; Human ; Liver/*pathology/radiography ; Liver Neoplasms/*etiology/pathology/radiography ; Tomography, X-Ray Computed

No abstract available.
Carcinoma, Hepatocellular/*diagnosis/pathology/radiography ; Hepatitis B, Chronic/diagnosis ; Humans ; Liver Neoplasms/*diagnosis/pathology/radiography ; Male ; Middle Aged ; Tomography, X-Ray Computed

Hepatocellular carcinoma (HCC) rarely invades the gastrointestinal (GI) tract. It occurs in 0.7% to 2% of clinical HCC cases. Moreover, gastric invasion with GI hemorrhage via peritoneal seeding is very rare. We report the case of 67-year-old woman who had a history of HCC rupture and was admitted due to left upper quadrant abdominal pain. The patient was diagnosed with three omental metastatic masses and underwent hepatic segmentectomy and omental tumorectomy. Two months later, the patient had massive melena, and an esophagogastroduodenoscopy showed very large ulcerated friable mass on the gastric body. The histology was consistent with the diagnosis of metastatic HCC. The patient died from persistent GI hemorrhage 93 days after the admission. This case illustrates the very rare event of peritoneal seeding of a ruptured HCC causing direct invasion of the stomach, followed by GI hemorrhage.
Aged ; Carcinoma, Hepatocellular/*diagnosis/radiography/secondary ; Female ; Gastrointestinal Hemorrhage/*diagnosis/etiology/radiography ; Gastroscopy ; Humans ; Liver Neoplasms/*diagnosis/pathology/radiography ; *Neoplasm Seeding ; Peritoneal Neoplasms/*diagnosis/radiography/secondary ; Stomach Neoplasms/*diagnosis/radiography/secondary ; Tomography, X-Ray Computed