Showing papers on "Kidney surgery published in 1987"

Differentiation of Striated Muscle Fibers in Pituitary Gland Grafts Transplanted beneath the Kidney Capsule

Abstract: Striated muscle fibers appear with regularity in pituitary isografts transplanted beneath the kidney capsule. These differentiated striated muscle fibers consist of multinucleated cells resembling skeletal muscle fibers. They appear mainly in the pars distalis, though occasionally in the pars intermedia of the grafts. Although most glandular cells disappeared due to necrosis in the center of the grafted anterior pituitary, where the striated muscle fibers occurred, the folliculo-stellate cells were well preserved in this region and formed elongated myotube-like structures. The muscle fibers appearing in the central pars distalis were in close contact to the folliculo-stellate cells and also to the marginal epithelium of the pituitary cleft. In these cases the striated muscle fibers and folliculo-stellate cells were surrounded by a common basal lamina. This close association between heterotopically differentiated muscle fibers and the normally occurring folliculo-stellate cells strongly suggests a close relationship in differentiation and function between these different cells.

Percutaneous nephrolithotomy in the dog. An experimental study.

Abstract: Percutaneous nephrostomies (PN) were created with teflon fascial dilators under fluoroscopic guidance, to implant stones bilaterally into the renal pelves of five dogs weighing 7 to 35 kg. Between one and seven stones of 0.25 to 1.00 cm diameter were implanted into each renal pelvis. Two to 4 weeks later, PN tracts were recreated, and the implanted renal stones were successfully removed under fluoroscopic and endoscopic visualization. Results of gross and histopathologic evaluation of the kidneys 2, 7, 14, 30, and 90 days after stone removal showed minimal, localized renal parenchymal trauma. Complications, although infrequent, included proximal ureteral tears and hemorrhage. Difficulty was encountered in maneuvering equipment around large or numerous stones. Canine percutaneous nephrolithotomy was successful despite great variation in kidney size, as well as variations in the number, size, and shape of stones in the upper urinary tract.

Polycystic renal dysplasia in children

Abstract: Ultrasonography has profoundly modified the diagnostic conditions of polycystic renal dysplasia in children. Non-palpable forms, which were previously most frequently missed, can now be detected during the antenatal period. In infants, ultrasonography generally provides a definite diagnosis, which can be confirmed by aspiration-opacification of the cysts. On the basis of a series of 40 cases and a review of the literature, the authors discuss the therapeutic implications of these new data. Surgery remains essential in cases of palpable polycystic renal dysplasia, especially when it is complicated. However, in the sub-clinical forms, as the risks of malignant degeneration and the incidence of post-operative complications are minimal in the one case and undefinable in the other, surgical excision is possible but not essential.