This research paper reviews six studies of various designs involving abnormal myocardial perfusion scintigraphic findings correlated with a normal or insignificant coronary angiography. Such results have typically been called "false-positive" and these studies either report their incidence or explore their validity. Findings have shown that abnormal myocardial perfusion studies may reflect occult cases of ischemia that are not evident or are underestimated by conventional coronary angiography, such as subcritical stenoses or myocardial microvascular dysfunction. These findings should be enough cause for further investigation by an attending physician or initiation of preventive medical intervention.
Human ; Male ; Female ; MYOCARDIAL PERFUSION IMAGING ; CORONARY ANGIOGRAPHY ; FALSE POSITIVE REACTIONS ; DIAGNOSTIC ERRORS ; MISDIAGNOSIS

Presented here is a rare occurrence of ameloblastic carcinoma located in the maxilla of a pediatric patient. The patient's chief complaint is a large mass protruding from the right maxillary area diagnosed as ameloblastic carcinoma before consulting the nuclear medicine section for whole-body bone scintigraphy. Whole-body bone scintigraphy was performed with cranial SPECT imaging. The maxillary tumor appeared to have decreased radiotracer uptake with intense activity in the anterior and anteromedial aspects of the tumor. There was also a focus of uptake in the lateral border of the tumor, radiating to the angle of the right mandible. Mandibular X-ray series was also acquired, with findings that correlate with those of the bone scintigraphy.

Human ; Male ; Child ; Child ; Mandible ; Maxilla ; Maxillary Neoplasms ; Nuclear Medicine ; Tomography, Emission-computed, Single-photon ; Whole Body Imaging ; X-rays ; Ameloblastoma ; Neoplasms ; Diagnostic Imaging