Brown tumors are rare skeletal manifestations of hyperparathyroidism (HPT) that may mimic cancer metastases. Histopathologically, they are difficult to differentiate from other giant cell lesions. A case is presented of 41-year-old woman with giant cell tumor in parieto-occipital region with injury of external bone lamina, growing into the skull cavity. The mass was suspected of being neoplasti...

The authors describe one case of squamouscell carcinoma of the liver, which developed in a 54-year-old male. The gross tumor was a cyst, 10 cm in diameter, with the brown contents. A histological study revealed high-grade differentiated squamous-cell carcinoma without keratinization. An immunohistochemical study showed a positive reaction with cytokeratin 19 and PCNA expression in single nuclei...

The present study was undertaken to obtain quantitative data relative to the deposition and egress of neoplastic cells from organs following their hematogenous dissemination and subcu taneous inoculation. MCr-labeled Walker tumor cells in the rat and similarly tagged Brown-Pearce and V2 carcinoma cells in the rabbit were employed. Preliminary investigation confirmed the efficacy of this isotope...

the alginate was extracted with six different methods from iran south seacoast algae, sargassum sp, and the percentage yield of alginate was determined. we divided our methods to two groups including acidic extraction and non-acidic. in acidic methods, hcl and h 2 so 4 were used as a detergent in extraction process and cacl 2 was exerted in non-acidic treatments. all treatments compared with ea...

The present study was undertaken to obtain quantitative data relative to the deposition and egress of neoplastic cells from organs following their hematogenous dissemination and subcu taneous inoculation. MCr-labeled Walker tumor cells in the rat and similarly tagged Brown-Pearce and V2 carcinoma cells in the rabbit were employed. Preliminary investigation confirmed the efficacy of this isotope...

The cells of the reticuloendothelial system are often regarded as barriers against the development and growth of malignant tumors. Experimental substantiation of this has been obtained by attempts to suppress the functions of these cells by so called blockade methods, and by stimulation of these Cells for the purpose of increasing their functional activity. The former procedure is considered to...

sulfated polysaccharides have shown promising effects on wound healing processes along with many other biological activities. the sulfated polysaccharides extracted from two algae species habitats in persian gulf were studied in vivo for their effects on collagen formation and epidermal regeneration. the polysaccharides were purified from aqueous extracts of p. tetrastromatica and p. boergeseni...

Skeletal manifestations of primary hyperparathyroidism (pHPT) include brown tumors (BT), which are osteoclastic focal lesions often localized in the jaws. Brown tumors are a rare manifestation of pHTP in Europe and USA; however, they are frequent in developing countries, probably related to vitamin D deficiency and longer duration and severity of disease. In the majority of cases, the removal o...

The XYZ factors have been prepared from tumor cells by keeping the tumor tissue frozen for a period of 10 days or longer, either by anaero bic storage (4, 8, 22) or by prolonged desiccation (lyophilization) (4, 24, 25). Ordinarily, tumor cells are killed by this treatment, although the presence of viable tumor cells does not neutralize or dimin ish the XYZ effect (4, 9, 16, 17). Furthermore, tu...