摘要:

&NA;A 69-year-old man who had widespread bony metastatic disease from prostate cancer also had a long history of diffuse joint pain. Tc-99m MDP whole-body imaging showed progression of a diffuse metastatic pattern, with increased tracer uptake in the supraorbital rims. These lesions in the supraorbital rims represent an unusual variant of bony metastases to the skull.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;Two children with the antenatal diagnosis of hydronephrosis secondary to a primary obstructed megaureter are presented. Both children were treated nonoperatively. They were observed with serial diuretic scintigrams using Tc-99m MAG3 and renal sonography. Throughout, the children have been asymptomatic. During a 3-year follow-up period, the diuretic renogram documented resolution of obstruction in one child and stable renal function with improved drainage in the other.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;Numerous studies have shown that chemotaxis is affected by certain antibiotics and steroids. A patient had Crohn's disease in relapse with multiple small bowel fistulae and mesenteric abscesses. Although the Tc-99m WBC scan did not show the intra-abdominal inflammatory foci, an In-111 WBC scan performed within a week delineated the abscesses and these were later confirmed at surgery. This case is being presented not only to show the relative sensitivities of a Tc-99m WBC vs. an In-111 WBC scan, but also to discuss the impediment to polymorphonuclear leukocyte chemotaxis by steroids, which may be a contributory factor to the sensitivities of the different radiopharmaceuticals selected for detection of intra-abdominal septic foci.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;Patients with epileptic and nonepileptic seizures are commonly encountered in clinical practice, and they can pose a difficult diagnostic problem. We present two cases that show the difficult task of differentiating between true epileptic and nonepileptic or psychogenic seizures in some patients. The clinical presentations were complex and the use of video-monitored EEG alone was insufficient to make definitive diagnoses. Ictal and interictal Tc-99m HMPAO brain perfusion SPECT imaging examinations were used to help establish the correct diagnoses. This report describes the advantage of using the brain perfusion SPECT imaging examination. The injection of stabilized Tc-99m HMPAO during an ictal event followed by appropriate medical therapy provides a ethod of obtaining a reasonable image of relative perfusion(activity) during the seizure. These images can then be compared with interictal examinations and an epileptic or nonepileptic focus may be localized. The Tc-99m HMPAO brain perfusion SPECT imaging study was helpful in establishing the correct diagnosis in both cases.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;The authors report a case of idiopathic portal hypertension in which radioaccumulation in the peripheral region of the liver decreased markedly. On dynamic CT, peripheral regional enhancement of the liver was seen in the arterial phase. The region was hypointense on T1-weighted MR images and hyperintense on T2-weighted images. On portograms via the superior mesenteric artery, markedly decreased portal venous perfusion was seen in the peripheral region of the liver. Tc-99m galactosyl human serum albumin (GSA) liver scintigrams showed decreased accumulation in the peripheral region and unchanged accumulation in the central region of the liver. Tc-99m GSA liver scintigraphy clearly showed localized liver dysfunction in the peripheral region.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;Five hemangiomas were found in four patients and were assessed by three-phase blood perfusion and blood-pool scintigraphy to determine the usefulness of this method for the imaging characteristics of different types of hemangiomas of the extremities. After injecting Tc-99m RBC or Tc-99m DTPA HSA, dynamic perfusion and early and delayed pool images were obtained and analyzed. The perfusion images of one cavernous hemangioma and two venous hemangiomas showed normal activity, but blood-pool imaging showed increased activity, whereas on perfusion imaging and early blood-pool imaging, another cavernous hemangioma showed a partial increase in activity in its periphery and on delayed blood-pool imaging, diffuse increase in activity. Further, the remaining hemangioma, a mixed-type hemangioma, showed, diffuse increase in activity on both perfusion and blood-pool imaging. Thus, three-phase scintigraphy was found useful in evaluating and achieving a diagnosis of a hemangioma of the extremities.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;A patient with shortness of breath had a high probability lung scan for pulmonary embolism, but no obvious embolic source. Whole-body scintigraphy using Tc-99m labeled Fab' antifibrin monoclonal antibody showed large central pulmonary emboli as well as tracer uptake in the right atrium and aortic arch. No lower extremity clot was detected. This case shows significant differences in the appearance of pulmonary embolism as assessed by direct clot and ventilation-perfusion scintigraphy. It shows the importance of the heart as the origin of pulmonary emboli and the utility of direct thrombus visualization.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;Radioiodine whole-body imaging is the most accurate method in the diagnosis of metastases from differentiated thyroid cancer. However, false-positive images rarely occur. The authors report unusual cases of thymic hyperplasia and post-traumatic skull changes mimicking mediastinal, skull, or cerebral metastases. Nonthyroidal causes were diagnosed by other radionuclide studies (bone and brain scintigraphy) and CT scans. Follow-up and undetectable thyroglobulin levels helped confirm the benign cause.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;A 24-year-old man with congenital bladder diverticula leading to bilateral hydronephrosis diagnosed on radionuclide scintigraphy is described. Diagnostic findings of sonogram and CT scan are also mentioned.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID

摘要:

&NA;A 62-year-old man had right upper quadrant abdominal pain, jaundice, fever, and leukocytosis. Tc-99m HIDA imaging showed nonvisualization of the gallbladder and increased pericholecystic hepatic uptake. The latter scintigraphic finding, known as a "rim sign," is often associated with acute gangrenous cholecystitis. Surgery in this patient showed acute cholecystitis with focal areas of gangrenous necrosis associated with a solitary calculus.

ISSN:0363-9762    

出版商:OVID    

年代:1997

数据来源: OVID