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Endoscopic Combined Intrarenal Surgery for a Large Stone in a Rare Fused Supernumerary Kidney.
Cureus
December 2024
Urology, Hospital General Dr. Agustín O'Horán, Mérida, MEX.
A supernumerary kidney is a rare birth defect where an extra kidney is present. This extra kidney has its own separate outer covering, blood supply, and collection system. Normally, percutaneous nephrolithotomy (PCNL) is the treatment of choice for large kidney stones, but its ideal use for supernumerary kidneys is unknown.
View Article and Find Full Text PDFAnalysis of MRI-based vertebral bone quality (VBQ) scores in patients with degenerative lumbar scoliosis.
World Neurosurg
January 2025
Department of Radiology, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200071, P.R. China.
Introduction: Degenerative lumbar scoliosis (DLS) often causes various issues such as neural symptoms and osteoporosis (OP). Vertebral bone quality (VBQ) is a crucial factor that surgeons take into consider prior to surgery. However, little attention has been given to the use of VBQ in evaluating vertebral bone mass in DLS patients.
View Article and Find Full Text PDFClinical presentation of pheochromocytoma and screening recommendations.
Rev Clin Esp (Barc)
January 2025
Servicio de Endocrinología y Nutrición, Hospital Universitario Ramón y Cajal, Madrid, Spain; Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain. Electronic address:
Pheochromocytomas are neuroendocrine tumors that derive from sympathetic adrenomedullary chromaffin tissue and produce catecholamines. Due to the excess release of catecholamines, they can produce arterial hypertension, tachycardia, sweating, headache and a large number of other clinical manifestations secondary to the stimulation of α and β adrenoreceptors. Screening for pheochromocytoma is recommended in patients with paroxysmal, resistant or early-onset arterial hypertension, in cases with symptoms suggestive of catecholamine hypersecretion, patients with hereditary syndromes associated with pheochromocytomas, diabetes mellitus of atypical presentation and in adrenal incidentalomas with radiological characteristics not typical of adenoma (with > 10 Hounsfield Units on non-contrast CT).
View Article and Find Full Text PDFHounsfield Unit Utilization in Cervical Spine for Bone Quality Assessment: A Scoping Review.
J Clin Med
January 2025
Department of Neurosurgery, Montefiore Medical Center, Bronx, NY 10461, USA.
Bone mineral density (BMD) is an essential indicator of bone strength and plays a crucial role in the clinical management of various spinal pathologies. Hounsfield units (HUs) calculated from computed tomography (CT) scans are a well-established, effective, and non-invasive method to determine bone density in the lumbar spine when juxtaposed to dual-energy X-ray absorptiometry (DEXA) scans, the gold standard for assessing trabecular bone density. Only recently have studies begun to investigate and establish HUs as a reliable and valid alternative for bone quality assessment in the cervical spine as well.
View Article and Find Full Text PDFLifelike and Deformable Lung Phantoms for 4DCT Imaging: A Three-Dimensional Printing Approach.
Conf Proc Int Conf Image Form Xray Comput Tomogr
August 2024
Department of Radiology, Perelman School of Medicine, Philadelphia, PA, USA.
Respiratory motion phantoms can be used for evaluation of CT imaging technologies such as motion artifact reduction algorithms and deformable image registration. However, current respiratory motion phantoms do not exhibit detailed lung tissue structures and thus do not provide a realistic testing environment. This paper presents PixelPrint, a method for 3D-printing deformable lung phantoms featuring highly realistic internal structures, suitable for a broad range of CT evaluations, optimizations, and research.
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