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Biomedical subjects

W M Sy

Publications and source records attributed to W M Sy.

30 records · Page 2Linked to original sources
PubMed1975

Significance of absent or faint kidney sign on bone scan.

Seven men, six suffering from widespread bone metastases of prostatic origin and one with urinary bladder carcinoma, demonstrated minimal or no discernible radioactivity in the kidneys and urinary bladder at the time of bone scanning using 99mTc-stannous polyphosphate. The mechanism behind this scan finding is thought to be rapid and enhanced uptake of the radiopharmaceutical by pathologic bone. The significance of the faint or absent kidney sign in bone scanning, particularly in cases where abnormally homogeneous and symmetric radioactivity exists, is discussed.

Aged↗
PubMed1975

"Cold" lesions on bone imaging.

Photon-deficient foci or "cold" lesions were demonstrated on 99mTc-polyphosphate bone imaging in eight individuals with various malignancies and one in sickle cell crisis. The bone radiographs of five of these persons failed to show corresponding bony changes at the time of the imaging. Most of the "cold" lesions observed on bone imaging were located in the denser and tubular bones. A postulate has been advanced regarding the factors that might influence the different gamma-imaging manifestations of radiographically demonstrable lytic lesions. The cases presented herein further emphasize the importance of recognizing the existence of "cold" areas in the images of bones and the need to place these in proper perspective when interpreting scans.

Adult↗