White Thyroid Scintigraphy.

White thyroid scintigraphy corresponds to an absence or near-absence of radiotracer fixation in the cervical region. After eliminating technical causes, the main etiologies are iodine overload, thyroiditis, and congenital hypothyroidism. We report the case of a 22-day-old newborn with congenital hypothyroidism.

Unusual False Positive on Tc-Tektrotyd Scintigraphy Mimicking Bone Metastasis.

Somatostatin receptor scintigraphy is a key diagnostic tool in the initial staging and therapeutic evaluation of neuroendocrine tumors. Its specificity can be compromised by the presence of false positives. We illustrate here the case of a vertebral hemangioma detected on Tc-Tektrotyd scintigraphy as an incidental finding in a 34-year-old man referred for the staging of a well-differentiated neuroendocrine tumor of the ampulla of Vater (Fig.

Artifactual Hot Spots on Technetium-99m Macroaggregated Albumin Perfusion Lung Scan.

A 40-year-old male patient with pulmonary tuberculosis was subjected to a perfusion lung scan to rule out pulmonary embolism. Administration of technetium-99m macroaggregated albumin through preexisting venous access resulted in multiple round hot spots in both pulmonary fields. This finding was interpreted as an artifact caused by injection through preexisting venous access.

Pulmonary artery stenosis in Takayasu disease mimicking pulmonary embolism on perfusion lung scan: A case report.

Lung scan is an accurate and noninvasive tool for evaluating the distribution of lung perfusion. We present a rare case of total absence of perfusion on lung scan to the right lung with two contralateral defects due to severe occlusion of the right pulmonary artery, as well as segmental arteries in the left lung in a young female woman diagnosed with Takayasu Arteritis. We highlight the similarities of the findings between pulmonary arteritis in Takayasu disease and thromboembolic disease and the importance of careful interpretation of perfusion lung scan in order to avoid misdiagnosis that could endanger the patient's life.

[Tumoral calcinoses in a chronic hemodialysis patient: The role of SPECT/CT hybrid imaging].

Introduction: Tumoral calcinosis is a rare benign disease, defined by the presence of calcified deposits in periarticular tissues. It can be hereditary or secondary at chronic renal failure at the stage of dialysis. This work illustrates the contribution of single-photon emission computed tomography (SPECT/CT) in the diagnosis and management of tumoral calcinoses in a chronic hemodialysis patient, based on a clinical case.