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J Bernstein

Publications and source records attributed to J Bernstein.

At least 343 records · Page 19Linked to original sources
PubMed1969

Lipofuscin (aging) pigment granules of the newborn human liver.

We have observed pigmented cytoplasmic granules, with the characteristic staining properties of lipofuscin (ceroid, "wear-and-tear") pigment, in newborn human liver. The pigment is found at the periphery of the lobule in hepatocytes and some bile ductular cells. It is acid-fast, PAS-positive after diastase digestion, slightly argyophilic and sudanophilic, and markedly Schmorl's- and peroxidase positive in paraffin sections. Difficult to see in sections stained with hematoxylin and eosin, the pigment can be detected in unstained sections. The granules also resemble lipofuscin found in adult tissues, in their ultra-structural and enzymatic properties. They are polymorphic, contain granular material of moderate and high electron opacity, and are delimited by a single membrane. Acid phosphatase and beta-glucuronidase activities are visualized in the newborn granules, identifying them as lysosomes. The granules also contain copper and, to a much lesser extent, iron. The accumulation of lipofuscin pigment in lysosomes in many tissues correlates well with aging, and this process has been interpreted as a reflection of cellular degeneration or wear-and-tear. However, the presence of lipofuscin granules as a constant component of neonatal liver suggests that they are not a measure of cellular senescence.

Acid Phosphatase↗
PubMedDate not supplied

Renal cell carcinoma in children with diffuse cystic hyperplasia of the kidneys.

We report the clinical, pathologic, and genetic features of renal malignancy in two children with diffuse cystic hyperplasia. Both presented with massive bilateral nephromegaly. Neither had a family history or clinical findings suggestive of tuberous sclerosis or von Hippel-Lindau disease. The kidneys of both children were extensively replaced by tubulocystic hyperplasia with large eosinophilic epithelial cells. The masses of hyperplastic tissue were nodular, compressing remnants of uninvolved renal parenchyma. Tubulopapillary carcinoma was present in both children, one of whom had bilateral multicentric carcinoma. No loss of heterozygosity was detected in the tumors at the TSC1, TSC2, or VHL gene regions, and no alterations in the VHL gene were detected using single-strand conformation polymorphism analysis. These cases of bilateral renal enlargement with diffuse cystic hyperplasia appear to represent a new clinical syndrome that may warrant bilateral nephrectomy because of the risk of malignancy.

Adenocarcinoma↗
PubMedDate not supplied

Home birth and short-stay delivery. Lessons in health care financing for providers of health care for women.

The current restructuring of the U.S. health care delivery system is driven primarily by economic forces. Although primary care providers may understand the roles of technology and advocacy in fostering fundamental change, they may not be familiar with the issues related to financing of health care and, thus, may not fully appreciate the extent to which economic factors influence the character of their professional lives and the services they provide. Analysis of the loss of the home birth option in the 1950s provides a method for understanding and influencing the factors driving health care restructuring today. In examining short-stay delivery in the 1990s, this article also addresses ways in which managed health care systems may improve or restrict women's access to a variety of primary care services.

Cost Control↗