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Accumulation of 99m Tc-Sn-pyrophosphate in pleural effusions. 1978

C Aprile, and G Bernardo, and M Carena, and A Favino, and G R Cuna, and M R Strada, and S Mascherpa

Accumulation of 99m Tc-Sn-pyrophosphate in pleural effusions has been evaluated in 56 patients grouped as follows: 8 with bacterial effusion (Group A), 27 with malignant effusion treated by local and/or parenteral antitumor chemotherapy (Group B), 21 with malignant effusion treated only by supportive therapy (Group C). Results, expressed as effusion to plasma PPi ratio, ranged from 0.1 to 0.28 in group A, from 0.04 to 0.64 in group B and from 0.60 to 1.73 in group C, with significant differences among the three groups. In no case was uptake found in cells of the sediment. Chemical analysis (including total and ionized calcium, total protein, acid and alkaline phosphatase) of plasma and exudate in neoplastic patients showed a slight, but significant, difference between groups B and C as regards plasma-effusion gradient for total calcium and acid phosphatase. Negative correlation also exists between effusion to plasma PPi ratio and plasma-exudate gradient for ionized calcium in neoplastic patients. The data support the hypothesis that acid phosphatase content and calcium gradient are among the factors involved in the mechanism of PPi accumulation in pleural effusions.

UI MeSH Term Description Entries
D010996 Pleural Effusion Presence of fluid in the pleural cavity resulting from excessive transudation or exudation from the pleural surfaces. It is a sign of disease and not a diagnosis in itself. Effusion, Pleural,Effusions, Pleural,Pleural Effusions
D010997 Pleural Neoplasms Neoplasms of the thin serous membrane that envelopes the lungs and lines the thoracic cavity. Pleural neoplasms are exceedingly rare and are usually not diagnosed until they are advanced because in the early stages they produce no symptoms. Neoplasms, Pleural,Neoplasm, Pleural,Pleural Neoplasm
D011756 Diphosphates Inorganic salts of phosphoric acid that contain two phosphate groups. Diphosphate,Pyrophosphate Analog,Pyrophosphates,Pyrophosphate Analogs,Analog, Pyrophosphate
D011877 Radionuclide Imaging The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph. Gamma Camera Imaging,Radioisotope Scanning,Scanning, Radioisotope,Scintigraphy,Scintiphotography,Imaging, Gamma Camera,Imaging, Radionuclide
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013667 Technetium The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, and atomic number 43. All technetium isotopes are radioactive. Technetium 99m (m Technetium 99m,99m, Technetium
D014001 Tin A trace element that is required in bone formation. It has the atomic symbol Sn, atomic number 50, and atomic weight 118.71. Stannum

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