bone cysts/phosphatase

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Acid and alkaline phosphatase activity in bone-cyst fluid.

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The acid and alkaline phosphatase activity in fluid aspirated from solitary bone cysts in six patients was measured, and large increases in the concentration of acid phosphatase were found. In some cases this increase was reflected in venous blood concentrations. The significance of these findings

Immunocytochemical markers (endothelial and histiocytic) and ultrastructure of primary aneurysmal bone cysts.

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Since the first description of an aneurysmal bone cyst in 1942, the pathogenesis of this tumor-like lesion has been controversial. Aspects of interest for elucidating the nature of this lesion include the cellular linings of the aneurysmal cavity systems as well as the character and cellular

Telangiectatic osteosarcoma: Outcome analyses and a diagnostic model for differentiation from aneurysmal bone cyst.

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UNASSIGNED Telangiectatic osteosarcoma (TOS), a rare variant of osteosarcoma, may be easily misdiagnosed as aneurysmal bone cyst (ABC). The aims of this study were to investigate the diagnostic and prognostic factors of TOS by reviewing our experience with TOS and to develop a diagnostic model that

The role of osteoblast cells in the pathogenesis of unicameral bone cysts.

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OBJECTIVE The pathogenesis of unicameral bone cysts (UBCs) remains largely unknown. Osteoclasts have been implicated, but the role of osteoblastic cells has, to date, not been explored. This study investigated the pathophysiology of UBCs by examining the interactions between the cyst fluid and human

[The characteristics of chemical composition of content of unicameral bone cysts depending on their growth stage].

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The article deals with the results of study of chemical composition of solitary cysts and blood serum of 27 patients. The results demonstrated that qualitative composition of f content of unicameral bone cysts is identical to chemical composition of blood serum. The results of analysis of total

Solid variant of aneurysmal bone cyst of the left parietal bone without preceding trauma.

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BACKGROUND We report the case of a 17-year-old girl with an indolent, smooth swelling of the left cranial vault that had been developing for 2 months. Complete surgical excision was performed and the defect was closed using artificial bone cement. The integrity of the dura mater was conserved and

Biologic characterization of human bone tumors. VI. The aneurysmal bone cyst: an enzyme histochemical, electron microscopical, and immunohistological study.

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The etiology of aneurysmal bone cyst is still unknown. Most theories of the histogenesis of this lesion assume a vascular origin and speculation has focused on the characteristic pseudoendothelial lining of the cyst walls. In the present study, this structure has been subjected to enzyme

The role of lysosomes in the pathogenesis of unicameral bone cysts.

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Unicameral bone cyst fluid possesses N-acetyl-beta-D-glucosaminidase, beta-glucuronidase, PZ-peptidase, cathepsin D, acid phosphatase, N-acetyl-beta-D galactosaminidase, and beta-galactosidase activities. The activities of lysosomal enzymes in the cyst fluid are, as a rule, higher than in the serum,

[Initial clinical experience with BAS O, a bioactive glass-ceramic material].

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The authors describe a group of patients where the surgical operation involved among others filling of bone defects with glass-ceramic material--dense (as granules) or porous (as a block). Glass-ceramics BAS O were developed in the laboratories of LASAK Co. in Prague. Two defects were of traumatic

Histological Evaluation of Early-Phase Changes in the Osteochondral Unit After Microfracture in a Full-Thickness Cartilage Defect Rat Model.

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BACKGROUND The microfracture (MF) technique is an established surgical treatment for cartilage injury. However, the early-phase histological changes in full-thickness cartilage defects (FTCDs) after MF and the concomitant changes in the subchondral bone are still unknown. OBJECTIVE To determine the

Multinucleated giant cells in various forms of giant cell containing lesions of the jaws express features of osteoclasts.

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BACKGROUND The nature and the mechanism involved in the formation of the multinucleated giant cells (MGCs) in various giant cell-containing lesions of the jaws are not fully understood. The aim of this study is to clarify the osteoclastic features of the MGCs in central giant cell granuloma (CGCG),

Preoperative easily misdiagnosed telangiectatic osteosarcoma: clinical-radiologic-pathologic correlations.

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OBJECTIVE To describe the clinical, imaging, and pathologic characteristics and diagnostic methods of telangiectatic osteosarcoma (TOS) for improving the diagnostic level. METHODS The authors retrospectively reviewed patient demographics, serum alkaline phosphatase (AKP) levels, preoperative biopsy

Perspectives of clinical application of bone morphogenetic proteins in children.

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The purpose of the study was to modify the method of Bone Morphogenetic Protein (BMP) extraction from bovine bones, estimate the osteoinductive potential of the extracted protein fractions in relation to the degree of protein purity and to test collagen formed in porous discs as a carrier. It was

Clinical significance of hyperparathyroidism in familial multiple endocrine adenomatosis type I (MEA I).

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In order to investigate the suggestion that hyperparathyroidism in patients with familial MEA I has a mild and nonprogressive clinical course, we have compared clinical, biochemical, roentgenologic and histologic features of 29 patients with hyperparathyrodism originating from six families with the

[A descriptive clinical study of a type of arthritis in beekeepers of the Badajoz area of La Siberia Extremeña].

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BACKGROUND The appearance of episodes of arthritis has been detected in beekeepers in the Siberia Extremadura (Spain) related to working with the hives. This present work describes the clinical features of such arthritic syndrome. METHODS Sixty cases were selected at random from a previous

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