Ureteral reflux of recipient's own kidneys. A potential source of error in renal transplant evaluation.

After transplantation, pre-existent vesicoureteral reflux caused a hot paravesical area mimicking urine extravasation.

201Tl myocardial imaging in a cardiac rejection episode.

Serial myocardial imaging using thallium Tl 201 was performed in the early follow-up of two patients with orthotopic cardiac transplantation. In one patient, non-homogeneous uptake, small defects and an irregular myocardial edge were observed during a moderately acute rejection crisis revealed by endomyocardial biopsy. The abnormal gammagraphic findings and histological changes were coincident and exhibited a parallel reversal. We emphasize the connection between these two events. The mechanisms which could explain these phenomena are discussed.

Scintigraphic demonstration of a diaphragmatic defect as the cause of massive hydrothorax in cirrhosis.

A 64-year-old man presented with a massive right-sided hydrothorax associated with cirrhosis of the liver. There was no clinical evidence of ascites nor other underlying disease. The usual complementary tests failed to demonstrate any causative abnormality. Chest and abdominal scintigraphy after intraperitoneal injection of 99mTc-human serum albumin disclosed early filling of the pleural space by the radiopharmaceutical and suggested a diaphragmatic defect as the cause for this rare association.

[Indirect isotopic lymphography. Technic and clinical applications]. / La linfografía isotópica indirecta. Técnica y aplicaciones clínicas.

Interstitial lymphoscintigraphy is a diagnostic method useful in the staging and follow-up of several tumours as well as in the etiological evaluation of limb edema. It is a simple technique with minimal invasivity which can be performed even in those regions inaccesible to radiographic lymphography. Because of its great sensitivity and low specifity it requires careful interpretation.

[67gallium. Diagnostic possibilities and usefulness as a tracer]. / El citrato de 67Galio. Posibilidades diagnósticas y utilidad como rastreador.

As a consequence of its affinity to leukocytes and tumour cells, 67Gallium-Citrate is a good isotope for detecting infections and tumoral pathology. Its sensitivity is greater for lymphatic system malignancies, primary lung cancer, primary liver carcinoma and melanoma. It is a useful method with more sensitivity than diagnostic specificity.

Ureteral fistula after renal transplantation: the significance of delayed images.

Urinary leakage after renal transplantation is a serious complication that can lead to diagnostic difficulties. A case is reported of urinoma secondary to ureteral fistula characterized in the routine study by a photon-deficient area. Only the image obtained at 6 h allowed a correct diagnosis. The causes for this are discussed and the need to include a delayed study in the follow-up protocol of these patients is emphasized.