Purpose: We report a case of idiopathic sclerochoroidal calcification (SCC) evaluated with multimodal imaging including swept source optical coherence tomography angiography (SS-OCTA).
Case Presentation: A 52-year-old man was diagnosed with sclerochoroidal calcification in the left eye. Multimodal imaging revealed mixed hypoautofluorescence and hyperautofluorescence on fundus autofluorescence (FAF) imaging; an acoustically solid lesion with hyperreflective deposits on ultrasonography (USG); a rocky configuration with marked disruption of outer retinal layers and abrupt transition from normal to tumor tissue on swept source optical coherence tomography (SS-OCT); hyporeflective plexus in the outer retinal and choroidal slabs and a retinochoroidal shunt vessel on SS-OCTA; and central hypofluorescence with intervening patchy hyperfluorescent areas, diffuse peripheral window defects, and a retinochoroidal shunt vessel on fluorescein angiography (FA). Systemic evaluation including serum parathyroid hormone, calcium, phosphorus, albumin levels, and urine analysis were normal.
Conclusion: Sclerochoroidal calcification is a rare ocular tumor that may be idiopathic or secondary to several nephrological or endocrinological diseases involving calcium and phosphorus mechanism. Multimodal imaging with FAF, USG, OCT, OCTA, and FA help to identify the distinguishing features of the tumor and differentiate it from other entities.
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http://dx.doi.org/10.1016/j.pdpdt.2022.103054 | DOI Listing |
Am J Nucl Med Mol Imaging
December 2024
Department of Radiology, University of Pennsylvania Philadelphia, PA 19104, USA.
This review assesses the primary neuroimaging techniques used to evaluate Parkinson's disease (PD) - a neurological condition characterized by gradual dopamine-producing nerve cell degeneration. The neuroimaging techniques explored include positron emission tomography (PET), single-photon emission computed tomography (SPECT), and magnetic resonance imaging (MRI). These modalities offer varying degrees of insights into PD pathophysiology, diagnostic accuracy, specificity by way of exclusion of other Parkinsonian syndromes, and monitoring of disease progression.
View Article and Find Full Text PDFPathol Oncol Res
January 2025
Department of Nuclear Medicine, Prof. Dr. Cemil Taşcıoğlu City Hospital, University of Health Sciences, Istanbul, Türkiye.
Background And Objectives: This study aims to evaluate the correlation between Tumor-Infiltrating Lymphocyte (TIL) levels and Fluorine-18 fluorodeoxyglucose (F-FDG) metabolic parameters, including spleen and bone marrow FDG uptake and tumor heterogeneity in non-luminal breast cancers (NLBC), and to elucidate their association with survival outcomes.
Methods: We retrospectively analyzed data from 100 females with stage 2-4 NLBC who underwent pretreatment F-FDG Positron emission tomography-computed tomography (PET/CT). TIL was scored based on Hematoxylin-Eosin-stained specimens and F-FDG PET metabolic parameters, including maximum standardized uptake value (SUVmax), mean standardized uptake value (SUVmean), metabolic tumor volume (MTV), total lesion glycolysis (TLG), liver, spleen, and bone marrow FDG uptake were calculated.
Mater Today Bio
February 2025
Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), Department of Nuclear Medicine, Peking University Cancer Hospital & Institute, Beijing, 100142, China.
Fibroblast activating protein (FAP) is up-regulated in cancer-associated fibroblasts (CAFs) of more than 90 % of tumor microenvironment and also highly expressed on the surface of multiple tumor cells like glioblastoma, which can be used as a specific target for tumor diagnosis and treatment. At present, small-molecule radiotracer targeting FAP with high specificity exhibit limited functionality, which hinders the integration of theranostics as well as multifunctionality. In this work, we have engineered a multifunctional nanoplatform utilizing organic melanin nanoparticles that specifically targets FAP, facilitating both multimodal imaging and synergistic therapeutic applications.
View Article and Find Full Text PDFMater Today Bio
February 2025
Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
The large recruitment of tumor-associated macrophages and low exposure of tumor-associated antigens in tumor microenvironment have severely suppress the efficacy of anti-tumor immunotherapy. Herein, biosynthesized magnetosome (Mag) from bacteria was loaded with photothermal/photodynamic agent/near infrared (NIR) fluorescence dye (IR780) and further modified with lipid-PEG-c(RGDyK) through biomembrane, forming Mag for fluorescence imaging, magnetic resonance imaging, immunotherapy and photodynamic/photothermal therapy. After intravenous injection into B16F10 tumor-bearing mice, Mag could efficiently accumulate in tumor tissues based on near infrared (NIR) fluorescence and magnetic resonance dual-modality imaging, and repolarize tumor-associated macrophages (TAMs) from M2 phenotype to M1 phenotype, significantly improving the effect of tumor immunotherapy.
View Article and Find Full Text PDFJ Biol Methods
November 2024
Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States.
Background: Current multimodal neuroimaging plays a critical role in studying clinical conditions such as cardiovascular disease, major depression, and other disorders related to chronic stress. These conditions involve the brainstem-hypothalamic network, specifically the locus coeruleus (LC), dorsal vagal complex (DVC), and paraventricular nucleus (PVN) of the hypothalamus, collectively referred to as the "DVC-LC-PVN circuitry." This circuitry is strongly associated with the norepinephrine (NE) and epinephrine (E) neurotransmitter systems, which are implicated in the regulation of key autonomic functions, such as cardiovascular and respiratory control, stress response, and cognitive and emotional behaviors.
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