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Ciliated hepatic foregut cyst is a rare, benign, most often solitary and unilocular, rarely multilocular cyst made up of a ciliated pseudostratified columnar epithelium, a subepitheial connective tissue layer, a smooth muscle layer and an outer fibrous capsule. The lesion is usually found incidentally by ultrasonography, during surgical exploration or autopsy. Recent publications characterizes of its fine needle aspiration biopsy features. The lesion is mostly asymptomatic, however one case caused portal vein compression and another which showed malignant trasformation through squamous metaplasia which warns to examine these lesions cautiously. As the lesion is extremely rare it is difficult to estimate its prevalence and its nature, so every single case presentation could be important.

A follow-up study was performed to describe characteristic physiological alterations by means of computer tomography, direct chemical analysis and histology of the liver, and blood biochemical parameters during conventional force-feeding of Landes geese. 30 birds were exposed to an 18-day long force-feeding. Sampling was performed at the start and during force-feeding (7th, 11th, 14th, 18th days). Computer tomographic data were plotted in 3D histograms, effectively indicating the volumetric development and the fat deposition of the liver. Applying the so-called fat index, a saturation process was found for the hepatic fat content. Histological sections indicated the appearance of microvesicular fat forms in the hepatocyte cytoplasm, which first turned to a total fatty infiltration, later changing to a macrovesicular form with progressing inflammation; membrane damage was not visualized. In blood metabolites triglyceride, total and HDL cholesterol and uric acid increased measurably, while creatinine concentration decreased. Alanine aminotransferase, aspartate aminotransferase activities increased strongly, while that of lactate dehydrogenase only slightly. Based on the results of macroscopic and microscopic imaging techniques and blood biochemical parameters, a comprehensive follow-up study was performed, elucidating still unknown processes during force-feeding of geese.