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The potential value of thallium-201 scintigraphy in the diagnosis of squamous cell carcinoma arising from extensive pyoderma.
J Dermatol
July 2023
Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Squamous cell carcinoma (SCC) arises from a variety of premalignant conditions, including pyoderma. However, an accurate diagnosis of SCC is sometimes challenging due to indistinguishable inflammatory lesions. Here, we present a case of SCC arising from extensive pyoderma, which was successfully diagnosed by taking advantage of thallium-201 scintigraphy.
View Article and Find Full Text PDFOptimal positioning in the detection of inferior wall infarct size with myocardial perfusion scintigraphy: prone vs. supine.
Anadolu Kardiyol Derg
December 2010
Department of Nuclear Medicine, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
Objective: The prone position is commonly utilized to reduce false positive perfusion defects because this position overcomes the diaphragmatic inferior wall attenuation in single-photon emission computerized tomography (SPECT) studies. We investigated whether the prone position had an important advantage over the supine position in determining the severity and extent of infarct in patients with acute inferior myocardial infarction (MI).
Methods: Twenty-nine male patients (mean age 61 ± 10 years) with acute inferior MI were enrolled in the cross-sectional study.
Coronary vasospasm produces reversible perfusion defects observed during adenosine triphosphate stress myocardial single-photon emission computed tomography.
Clin Cardiol
July 2008
Department of Medicine and Molecular Science, Hiroshima University Hospital, Hiroshima, Japan.
Background: Adenosine triphosphate stress thallium-201 single-photon emission computed tomography (ATP-SPECT) is useful for diagnosing coronary artery disease (CAD), although sometimes false positive results are observed. It has not been established whether a coronary spasm is responsible for the false positive findings during ATP-SPECT.
Hypothesis: We investigated whether coronary spasm is one of the factors which produces reversible defects on ATP-SPECT.
Diagnostic accuracy of supine and prone thallium-201 stress myocardial perfusion single-photon emission computed tomography to detect coronary artery disease in inferior wall of left ventricle.
Ann Nucl Med
May 2008
Division of Cardiology, Tokyo-Kita Social Insurance Hospital, 4-17-56 Akabanedai, Kita-ku, Tokyo, Japan.
Objective: Prone thallium-201 ((201)Tl) myocardial perfusion single-photon emission computed tomography (SPECT) reduces false-positive rates when evaluating inferior wall abnormalities by minimizing diaphragmatic attenuation. The present study investigates the diagnostic validity of prone (201)Tl stress myocardial perfusion SPECT for detecting coronary artery disease in the inferior wall of the left ventricle in Japanese patients.
Methods: Of the 104 consecutive patients who underwent (201)Tl stress myocardial perfusion SPECT to diagnose coronary artery disease, we evaluated 46 who underwent image acquisition in both the supine and prone positions, and coronary angiography within 3 months thereafter.
Role of coronary spasm for a positive noninvasive stress test result in angina pectoris patients without hemodynamically significant coronary artery disease.
Am J Med Sci
May 2008
Cardiology Section, Department of Medicine, Chang Gung Memorial Hospital at Keelung, Keelung, Taiwan.
Background: A positive noninvasive stress test result is often considered as a false-positive indicator of coronary artery disease (CAD) when coronary angiography reveals no hemodynamically significant CAD.
Methods: From January 2001 through December 2004, 5474 patients scheduled to undergo exercise electrocardiogram (ECG) [exercise ECG without imaging or exercise ECG with thallium-201 (201Tl) single photon emission tomography (SPECT)] or dipyridamole 201Tl tomography at our outpatient clinic because of chest oppressive sensation were included in this prospective study. Coronary angiography was performed when a noninvasive test result was positive for ischemia or when ischemic chest pain was suspected.
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