Qualities of a good radiology report.
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Medical Records↗
Biomedical subjects
R R Armas
Publications and source records attributed to R R Armas.
False-positive V/Q scan mimicking massive pulmonary embolism.
Technical error is not usually considered among the many possible causes of false-positive lung scans. A case is presented where the inadvertent injection of Tc-99m MAA through a Swan-Ganz catheter resulted in radionuclide imaging mimicking massive pulmonary embolism. After reinjection in a peripheral vein, a repeat perfusion scan showed unremarkable findings. Lack of the appropriate clinical presentation and the rarity of massive perfusion defects are important clues to recognizing this unusual but misleading situation.
Aged↗
Clinical studies with spleen-specific radiolabeled agents.
While 99mTc sulfur colloid imaging, because of its availability and convenience, remains the initial procedure of choice for spleen imaging, selective spleen scanning with damaged 99mTc-labeled RBCs can provide additional information in some cases. These cases include overlapping left hepatic lobe and suspected splenic pathology but with poor radiocolloid uptake that precludes visualization. Other indications are detection of residual splenic tissue after splenectomy, suspected asplenia, polysplenia, and situs ambiguus. The selective 99mTc-denatured RBC scan is most useful to confirm or exclude defects seen on the radiocolloid study and to detect small amounts of splenic tissue.
Adult↗
Gallium scanning in peritoneal mesothelioma.
Gallium scans in seven cases of pathologically proven primary peritoneal mesothelioma were reviewed and correlated with clinical, radiologic, and surgical findings. Although five patients gave a history of asbestos exposure, only two showed chest film findings typical of asbestosis. Most had abdominal discomfort, ascites, and abdominal masses. Five of the seven had positive gallium scans; three showed a large single focus of uptake and two showed diffuse abdominal uptake. Although these patterns correspond to the two main gross pathologic types described in peritoneal mesothelioma, there was not complete agreement with clinical, radiographic, and surgical findings, and the focal pattern tended to underestimate the extent of the disease. Although gallium uptake can be seen in a variety of other neoplastic and inflammatory conditions, it may be useful in the diagnosis and follow-up of peritoneal mesothelioma.
Adult↗
Gallium scintigraphy in bone infarction. Correlation with bone imaging.
The appearance of gallium-67 images in bone infarction was studied in nine patients with sickle cell disease and correlated with the bone scan findings. Gallium uptake in acute infarction was decreased or absent with a variable bone scan uptake, and normal in healing infarcts, which showed increased uptake on bone scan. The significance of these findings is discussed.
Adult↗
CT appearance of splenosis.
Splenosis is an unusual complication of splenic trauma. The computed tomographic (CT) appearance of splenosis is described. One should consider this diagnosis when faced with a history of splenic trauma and multiple round or oval masses at CT.
Adult↗
A simplified method of selective spleen scintigraphy with Tc-99m-labeled erythrocytes: clinical applications. Concise communication.
We report our initial clinical experience with a simplified spleen-imaging technique that requires no red cell washing or special kits. Thirty minutes after an injection of "cold" pyrophosphate containing 0.5 mg of stannous chloride or fluoride, a blood sample is drawn, 2 mCl of pertechnetate (Tc-99m) are added, the sample is incubated at 49--50 degrees for 35 min, and then reinjected into the patient. We have studied 13 patients with this technique, and have found it useful in the clarification of various questionable splenic abnormalities found on the sulfur colloid scan, as well as in the detection of splenosis.
Adult↗