Clinical imaging
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Clinical Trial
Clinical value of [(18)F]FDG-PET/CT in the detection of metastatic medullary thyroid cancer.
To evaluate the value of fluorine-18 2-deoxy-2-d-glucose positron emission tomography/computed tomography ([(18)F]FDG-PET/CT) in the detection of metastatic medullary thyroid cancer. ⋯ [(18)F]FDG-PET/CT has excellent sensitivity and specificity, especially when the calcitonin value is higher than 1000 pg/ml for detecting metastatic medullary thyroid cancer. Compared to conventional morphologic imaging methods, it provides additional information for diagnosis.
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Ventilation-perfusion (VQ) single-photon emission computed tomography (SPECT) comprised the administration of SmartVent (n=386) or Technegas (n=1564) and 200 MBq (99m)Tc-MAA. 1406 scans were normal, 462 showed PE, 61 showed a singular subsegmental mismatched defect, 21 scans were non-diagnostic. 26% of scans performed with Technegas showed PE, compared to 15% with SmartVent. VQ SPECT had a sensitivity of 95.7%, specificity 98.6%, positive predictive value 95.7%, negative predictive value 98.6%. A normal VQ SPECT scan implied a more than ten-fold lower cause-specific mortality (1 in 1406) than a scan showing PE (1 in 116). NPV of a negative D-dimer was 94.3%.
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To increase the awareness on intracranial papillary meningiomas (PMs) by presenting magnetic resonance imaging (MRI) findings on this disease. ⋯ Although PM is rare, it should be considered in the differential diagnosis when evaluating intracranial neoplasms. Younger patient age, as well as imaging features such as unclear tumor-brain interface, internal heterogeneity including cyst formation, irregular enhancement, signal voids of vessels, and marked peritumoral edema can help distinguish PM from typical benign meningiomas.
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Case Reports
Sling left pulmonary artery with patent type IIA tracheobronchial anomaly and imperforate anus.
We present a 3-month-old boy with a type IIA sling left pulmonary artery associated with imperforate anus and rectourethral fistula. Tracheobronchial abnormalities are demonstrated using multidetector CT with 3-D volume rendering of the airways. This case represents a novel variant of an already rare entity with an unusually high right upper lobe bronchus and no evidence of associated tracheobronchial stenosis.
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Clunealgia is caused by neuropathy of inferior cluneal branches of the posterior femoral cutaneous nerve resulting in pain in the inferior gluteal region. Image-guided anesthetic nerve injections are a viable and safe therapeutic option in sensory peripheral neuropathies that provides significant pain relief when conservative therapy fails and surgery is not desired or contemplated. The authors describe two cases of clunealgia, where computed-tomography-guided technique for nerve blocks of the posterior femoral cutaneous nerve and its branches was used as a cheaper, more convenient, and faster alternative with similar face validity as the previously described magnetic-resonance-guided injection.