To determine the multidetector computed tomography (MDCT) features as well as the anatomic-pathological basis in thyroid diseases involving the upper mediastinum, we performed a retrospective analysis of 49 patients who had thyroid diseases involving the upper mediastinum. In the study, 22 cases were nodular goiter, 13 cases were thyroid adenoma, and 14 cases were thyroid cancer. The relevance between MDCT appearances and their diffusing route of common thyroid diseases as well as the anatomic-pathological features in this region were evaluated. It was found that the lesions located in the upper anterior mediastinum, the upper posterior mediastinum, and both sides were 67.3% (33/49), 14.3% (7/49), 18.4% (9/49), respectively. Different diseases had their distinct MDCT features nodular goiter mainly showed localized and multiple nodules or tumor bulk (77.3%), thyroid adenoma mainly showed solitary tumor bulk (92.3%), and thyroid cancer mainly demonstrated solitary tumor bulk (57.1%), respectively. Among the 49 cases, 9 cases had cervical and/or mediastinal metastases in lymph nodes. The thyroid diseases involving the upper mediastinum most commonly occurred in the upper anterior mediastinum. The MDCT features and distribution of diffusing thyroid lesions in cervico-thoracic junctional region closely correlated with the anatomic-pathological characteristics in this region.
Goiter, Nodular ; diagnostic imaging ; pathology ; Humans ; Mediastinal Neoplasms ; diagnostic imaging ; pathology ; secondary ; Mediastinum ; diagnostic imaging ; pathology ; Multidetector Computed Tomography ; Thyroid Neoplasms ; diagnostic imaging ; pathology

To determine the relevance between MDCT features and anatomic-pathological basis of lymphoid neoplasm in cervico-thoracic junctional region, we performed a retrospective analysis of 69 patients with lymphoid neoplasm (lymphoma: 41 patients; metastatic tumor: 28 patients) involving the cervico-thoracic junctional region for MDCT features and distribution of lesions. The relevance between MDCT features and the anatomic-pathological basis in this region were evaluated. Among all the 41 patients with lymphoma, 29 with NHL (70.7%), 12 with HD (29.3%). The lymphomatous lymphadenopathy mainly located in superficial lateral cervix (51.2%, 21/41) ,deep jugular chain (65.9%, 27/41), supraclavicular fossa (75.6%, 31/41), paratrachea space in anterior mediastinum (46.3%, 19/41), around aortic arch (56.1%, 23/41), aortopulmonary window (53.7%, 22/41), upper anterior mediastinum (41.5%, 17/41), subcarinal space (26.8%, 11/41) and paraesophageal space (17.1%, 7/41). 28 patients had metastatic lymphoid tumor. The primary tumor were nasopharynx tumor (5 patients), thyroid cancer (7 patients), lung cancer (10 patients), and esophageal cancer (6 patients). Most metastasis took stage by stage in the way of lymphatic return, but a minority of cases migrated jumpily. The main metastatic sites were: beside jugular chain (82.1%), supraclavicular fossa (75%), paratracheal in anterior mediastinum (60.7%), upper anterior mediastinum (64.3%), beside aortic arch (35.7%), aortopulmonary window (39.2%), and paraesophageal space (28.6%). So lymphoid neoplasms in cervico-thoracic junctional region were involving both lower cervix and upper thorax simultaneously. The MDCT features and main distribution of lesions correlated with the anatomic-pathological characteristics in this region.
Adolescent ; Adult ; Aged ; Child ; Female ; Humans ; Lung Neoplasms ; diagnostic imaging ; pathology ; Lymphatic Metastasis ; diagnostic imaging ; Lymphoma ; diagnostic imaging ; Male ; Middle Aged ; Multidetector Computed Tomography ; Neck ; Thorax ; Young Adult

Objective Todeterminetherelationshipbetweenthetumorvolumeoftheperipherallungadenocarcinomawith maximum diameter≤3cmandlymphnodemetastasis(LNM).Methods TheMSCTmanifestationsof235subjectswhowerediagnosedasperipheral lungadenocarcinomawithmaximumdiameter≤3cm wereretrospectivelyanalyzed.Thesepatientsweregroupedaccordingtodifferent parametersincludingsmokinghistory,differentiation,tumorconsistencyandavailabilityoftumornecrosis.Tumorvolumeandratesof LNMamongthesegroupswerecompared.ROCanalysiswasusedtocalculatethecut-offvalueanddiagnosticaccuracy.Results (1) ThetumorvolumeofLNMgroupwaslargerthanthatofnoLNMgroup,cut-offvaluewas5.5cm3,andAUCwas0.76;(2)Therates ofLNMofthewell,moderate-well,moderate,moderate-poorandpoordifferentiationgroupswere0%,8.7%,17.7%,45.6%and46.7%respectively.Theratesofpuregroundglassopacity(p-GGO),mixedandsolidtumorwere0%,8.3%and29.3%respectively.The ratesofthetumorpresentandabsentofnecrosiswere47.8%,22.0%respectively(P＜0.05).Conclusion Usingthevolumeoftumor on MSCTtopredictLNMisanewnon-invasivewayofassessingLNM,withhighsensitivityandspecificity,whichcouldsupplymore imaginginformationforsurgeonstochoosethewayoflymphnodedissection.

This study is designed to test the agreement in measuring left ventricular systolic function between transthoracic two-dimensional echocardiography (2DTTE) and "gold standard" of non-invasive cardiac imaging, magnetic resonance imaging (CMRI) and their impacts on the classification of patients according to the left ventricular ejection fraction (EF). 32 patients who were suspected with heart disease were evaluated by CMRI and 2DTTE examinations. End diastolic volume (EDV), end systolic volume (ESV), EF and left ventricular function category were then calculated and compared. There was no significant difference (P=0.504) for EDV, while ESV of CMRI was significantly higher than that of 2DTTE (P=0.049), and EF of CMRI was significantly lower than that of 2DTTE (P= 0.018). There was no significant difference (P=0.077) in left ventricular functional category. Bland-Altman analysis of LV volumetric data and EF measurements showed a good agreement between two methods. The 2DTTE over-estimated I (n=5) or II (n=1) degrees of functional classification when compared with the CMRI. Both CMRI and 2DTTE are of great clinical value in evaluating left ventricular systolic function, while CMR may be more beneficial to patients with abnormal LV functions.
Adolescent ; Adult ; Aged ; Echocardiography ; Female ; Heart Diseases ; physiopathology ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Retrospective Studies ; Systole ; physiology ; Ventricular Function, Left ; physiology ; Young Adult

Objective:To explore the diagnostic accuracy and application value of 3.0 T non-contrast coronary magnetic resonance angiography (CMRA) in evaluating coronary artery in children with Kawasaki disease (KD).Methods:From May 2019 to January 2022, 75 children diagnosed with KD in our hospital were enrolled. All the patients underwent CMRA and transthoracic echocardiography (TTE) in one week, twenty-six of whom underwent coronary CT angiography (CCTA) or invasive coronary angiography (ICA) within two weeks. The diagnostic performance of CMRA and TTE was evaluated with CCTA/ICA as reference standard by per-patient basis, per-vessel basis, per-segment basis. Sensitivity and specificity of CMRA and TTE was compared by paired chi square test.The distribution of coronary artery aneurysm (CAA), thrombosis and other pathological changes of coronary artery were recorded and compared between two methods. The patients′ height and weight were collected to calculate the Z value. Z value>2.5 was defined as CAA.Results:All patients successfully completed CMRA examinations. Among the 26 patients, the sensitivity of CMRA was significantly higher than that of TTE by per coronary artery[97.7%(43/44)vs.84.1%(37/44), χ2=4.17, P<0.05]. CMRA showed a higher sensitivity than that of TTE both by proximal segments and middle/distal segments [97.7%(43/44)vs. 84.1%(37/44), 100%(21/21) vs. 52.4%(11/21), χ2=10.08, 7.11, both P<0.05). A total of 115 CAAs was found by CMRA, while only 87 (75.7%) CAAs were observed by TTE. Of the 28 (24.3%) CAAs missed by TTE, 16 (57.1%) were located in right coronary artery (RCA), 2(7.1%) in left main coronary artery, 7(25.0%) in left anterior ascending coronary artery (LAD) and 3(10.7%) in left circumflex coronary artery (LCX). Eleven (39.3%) missed CAAs by TTE were located in the proximal segment of RCA, LMCA, LAD and LCX, and 17 (60.7%) missed CAAs were located in the middle and distal segments. TTE missed coronary thrombosis in 5 patients compared with CMRA. Conclusions:3.0 T non-contrast CMRA is non-invasive and non-radiation, and the image quality can meet the needs of diagnosis, especially for detection of CAAs in RCA or in middle and distal segments of coronary artery in KD patients.

Humans ; Child ; Risk Factors ; Adipose Tissue

BACKGROUND: Exploring the underlying mechanism of rituximab resistance is critical to improve the outcomes of patients with diffuse large B-cell lymphoma (DLBCL). Here, we tried to identify the effects of the axon guidance factor semaphorin-3F (SEMA3F) on rituximab resistance as well as its therapeutic value in DLBCL. METHODS: The effects of SEMA3F on the treatment response to rituximab were investigated by gain- or loss-of-function experiments. The role of the Hippo pathway in SEMA3F-mediated activity was explored. A xenograft mouse model generated by SEMA3F knockdown in cells was used to evaluate rituximab sensitivity and combined therapeutic effects. The prognostic value of SEMA3F and TAZ (WW domain-containing transcription regulator protein 1) was examined in the Gene Expression Omnibus (GEO) database and human DLBCL specimens. RESULTS: We found that loss of SEMA3F was related to a poor prognosis in patients who received rituximab-based immunochemotherapy instead of chemotherapy regimen. Knockdown of SEMA3F significantly repressed the expression of CD20 and reduced the proapoptotic activity and complement-dependent cytotoxicity (CDC) activity induced by rituximab. We further demonstrated that the Hippo pathway was involved in the SEMA3F-mediated regulation of CD20. Knockdown of SEMA3F expression induced the nuclear accumulation of TAZ and inhibited CD20 transcriptional levels via direct binding of the transcription factor TEAD2 and the CD20 promoter. Moreover, in patients with DLBCL, SEMA3F expression was negatively correlated with TAZ, and patients with SEMA3F low TAZ high had a limited benefit from a rituximab-based strategy. Specifically, treatment of DLBCL cells with rituximab and a YAP/TAZ inhibitor showed promising therapeutic effects in vitro and in vivo . CONCLUSION Our study thus defined a previously unknown mechanism of SEMA3F-mediated rituximab resistance through TAZ activation in DLBCL and identified potential therapeutic targets in patients.
Humans ; Animals ; Mice ; Rituximab/therapeutic use* ; Hippo Signaling Pathway ; Lymphoma, Large B-Cell, Diffuse/pathology* ; Prognosis ; Semaphorins/therapeutic use* ; Antineoplastic Combined Chemotherapy Protocols/therapeutic use* ; Membrane Proteins/genetics* ; Nerve Tissue Proteins/genetics*