[Specifics of blood flow in the main portal vein in correlation with patterns of hepatic neoplasia].

We examined 121 patients with solid hepatic masses and 62 healthy volunteers with Doppler ultrasonography. Blood flow in the main portal vein was identified as ante-or retrograde. Hepatofugal blood flow was detected in 3 patients with primary tumors and in 2 with hemangiomas.

[Use of 18F-FDG PET scan in the diagnosis of large liver neoplasms and in the evaluation of therapeutic effectiveness].

The study involved 207 patients with large-size tumors. Results of 18FDG PET pointed to the basic factor of malignant transformation--foci of enhanced accumulation of radiological medicinal substances. Absence of ultrasound and CT-based evidence of such pathological accumulations contributed to interpretation of changes as benign ones.

[Current possibilities of radiodiagnosis in liver tumors].

The report deals with potential of present-day techniques for radiological imaging, differential diagnosis and working out of modalities of treatment for primary and metastatic hepatic tumors. Results of complex examination (ultrasound, CT, MRI, PET using fluorine -18 FDG) of patients with benign and malignant tumors are discussed. Sensitivity and specificity of each procedure have been identified to be used in diagnosis of large-size tumors.

[Imaging of collaterals and their impact on portal venous flow in patients with liver cirrhosis].

When the portal hypertension syndrome occurs, patients with liver cirrhosis develop three major collateral blood flow pathways. These are gastroesophageal, splenorenal, and paraumbilical ones along the recanalized umbilical veins. Only both the splenorenal pathway of blood return from the portal venous system, which considerably reduces portal blood flow volume and the paraumbilical one that increases portal blood flow are of hemodynamic significance.

[Complex radiation diagnosis of post-operative recurrent hepatic tumors].

The postoperative course of the disease was studied in 63 patients operated on for malignant hepatic lesion in 1990-1998. The pattern of surgical intervention-caused hepatic changes, which is observed at ultrasonography, CT, MRI, angiography, and oil-injected CT is described. Recurrences took place at the site of resection (9.