Malinovsky L

Nerve fibers—mast cells correlation in the rat parietal pleura

Our results show that a morphological correlation exists between catecholaminergic nerve fibers and mast cells in the rat parietal pleura. Mast cells are found in proximity to catecholaminergic nerve fibers. Moreover we have demonstrated that mast cells and nerve fibers in the perivascular areas of rat parietal pleura show the same formaldehyde fluorescence. In rats previously sympathectomized with neurotoxin 6-OHDA the nerve fibers appear disarranged and poorly fluorescent and related mast cells show a low fluorescence. The importance of this correlation and the possible role of mast cells are discussed.

Venous drainage of the stomach in the golden hamster (Mesocricetus auratus) and the guinea pig (Cavia aperea f. porcellus)

Venous drainage patterns of the stomach were studied in 30 golden hamsters (Mesocricetus auratus) and in 30 guinea pigs (Cavia aperea f. porcellus). In golden hamsters the most frequent group had a v. gastroepiploica dextra (85.6% of cases). The v. gastroepiploica sinistra was found in 63.3% of cases. In the second group, the venous drainage pattern was without a v. gastroepiploica dextra (13.3% of cases). The only constant venous channel from the stomach was the v. gastrica sinistra. Other veins draining the stomach were vv. gastricae (tributaries of the v. lienalis) and interorgan venous anastomoses with neighbouring organs. A venous arch along the curvatura ventriculi major was not observed in any of the cases. In the guinea pig, the first group with a v. gastroepiploica dextra accounted for 90.0% of cases while the second group without this vein represented 10.0% of cases. The only constant venous channel was, once again, the v. gastrica sinistra. Other veins of the stomach were similar to those in the golden hamster. A venous arch along the curvatura ventriculi major was found in 76.6% of cases. Some differences in the venous pattern between the two animal species can be explained by zoological differences in these mammals. The results obtained also stimulate interest in the study of possible variations in venous patterns of the stomach in man.

VENOUS DRAINAGE OF THE STOMACH IN THE DOMESTIC RABBIT (ORYCTOLAGUS CUNICULUS F. DOMESTICA, BREED LARGE CHINCHILLA) AND THE DOMESTIC CAT (FELIS CATUS L . F DOMESTICA)

Two basic patterns of venous drainage of the stomach were found in rabbits. In the first, which is highly prevalent (27 cases-90.0%), the v. gastroepiploica dextra is present while no such vein is present in the second one. Other venous channels are represented by the v. gastrica sinistra and by tributaries of the v. lienalis. In cats there are also two basic patterns of the stomach venous drainage. The first highly prevalent type without the v. gastroepiploica dextra was found in 23 cases (76.0%); in the second type this vein was present. In rabbits the v. gastroepiploica sinistra was observed in 25 cases (82.5%), in cats in only two cases (6.6%). The v. gastroepiploica dextra in the rabbit is usually a tributary of the v. portae, while in cats it is a tributary of the v. lienalis. In ten rabbits (33.3%) there was a venous arch around the curvatura ventriculi major, while in cats it was absent. The great difference in the stomach venous pattern in rabbits and cats can be explained by the different zoological position of these two kinds of animals.

Venous drainage of the stomach in the laboratory mouse (Mus musculus v. alba) and the laboratory rat (Rattus norvegicus v. alba)

The authors studied the venous drainage pattern of the stomach in 30 adult laboratory mice (Mus musculus v. alba) and in 31 adult laboratory rats (Rattus norvegicus v. alba) of both sexes. In mice, two basic patterns of the venous drainage of the stomach have been found, the first one (50.0% of cases) with a vena gastroepiploica dextra, while in the second pattern (50.0% of cases) the vena gastroepiploica dextra is absent and the venous blood from the curvatura major ventriculi and fundus ventriculi is drained only via the v. lienalis. In rats, three basic patterns of venous drainage of the stomach were found, the first group (35.2%) with the v. gastroepiploica dextra, the second group (38.4%) with prevalence of the v. gastrica sinistra and the third group with various tributaries of the v. lienalis from the stomach (25.6%). The vena gastrica sinistra is the only constant venous channel in both animals examined. Between interorganic venous anastomoses in the mouse and the rat no great differences exist. In spite of the great variability of veins the results indicate that it is possible to differentiate some basic patterns of the venous drainage of the stomach in the animals studied.