1
|
Rodler S, Goetz M, Graser A, Pal S, Vaishampayan U, Battle D, Staehler M. Patients experience with recurrence of renal cell carcinoma. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00523-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
|
2
|
Rodler S, Schott M, Casuscelli J, Graser A, Fürweger C, Muacevic A, Stief C, Staehler M. Robotic radiosurgery for the treatment of lung metastases of renal cell carcinoma. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00462-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
3
|
Spek A, Graser A, Habl G, Muacevic A, Fuerweger C, Seitz M, Haidenberger A. Single‐fraction image‐guided robotic radiosurgery efficiently controls local prostate cancer recurrence after radical prostatectomy. BJUI Compass 2020; 1:139-145. [PMID: 35474939 PMCID: PMC8988633 DOI: 10.1002/bco2.32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/25/2020] [Accepted: 06/28/2020] [Indexed: 11/29/2022] Open
Abstract
Purpose To assess the therapeutic potential of single‐fraction robotic stereotactic ablative body radiotherapy (SABR) in patients with locally recurrent prostate cancer (PC) after radical prostatectomy (RP). Materials and methods We included 35 patients with biochemical failure after RP with single‐site local recurrence in the prostate bed diagnosed by PSMA PET/CT. About 20/35 pts had previously received post‐surgical adjuvant radiation therapy. High‐resolution multiparametric magnetic resonance imaging (mpMRI) for exact visualization of tumor tissue was performed at 1.5 (n = 23; Siemens Magnetom Aera) or 3 Tesla (n = 12; Siemens Magnetom VIDA, Siemens Healthineers, Erlangen, Germany). Using the MRI and PET/CT dataset for planning, SABR was carried out after ultrasound‐guided placement of a single gold fiducial marker at the site of tumor recurrence using a CyberKnife M6 unit (Accuray Inc., Sunnyvale, USA). Due to the high diagnostic accuracy of PSMA PET/CT and mpMRI, pre‐SABR biopsy of tumor tissue was not deemed necessary. PSMA PET/CT performed in median 88 days before SABR confirmed the absence of distant metastases. MpMRI was performed at a median of 22 days prior to the intervention. SABR was performed in a single fraction with a dose of 20 (5/35), 21 (27/35) or 22 (3/35) Gy. Follow‐up serum PSA was measured every 3 months thereafter. Results Median patient age was 72 years (57‐80 years) and median time from RP to SABR was 96.8 months (IQR, 69.3‐160.2). Median serum PSA before SABR was 1.38 ng/mL (IQR 0.75‐2.72). At 3 months, median PSA had dropped significantly in 27/35 patients to a median of 0.35 ng/mL (IQR 0.25‐0.68). At 6 months, 30/35 patients showed biochemical response to SABR, while five patients were progressing: three had systemic disease on PSMA PET/CT, while two patients had rising PSA values without a visible correlate on PET/CT. The median follow‐up time was 16 months. Grade 1 genitourinary (GU) toxicity was reported in 3/35 patients (9%) and grade 1 gastrointestinal (GI) toxicity in 2/35 patients (6%), respectively. Conclusion SABR is an efficient new treatment option in the management of single‐site local recurrent PC without the evidence of systemic disease; due to its very low toxicity, it is an alternative to surgical re‐treatment or other focal therapies. It can significantly delay the onset of androgen deprivation therapy (ADT) in biochemical failure after radical prostatectomy.
Collapse
Affiliation(s)
- A. Spek
- Department of Urology Ludwig Maximilian University Munich Germany
| | | | - G. Habl
- Department of Radiation Therapy Technical University of Munich Munich Germany
| | - A. Muacevic
- European Cyberknife Center Munich Munich Germany
| | - C. Fuerweger
- European Cyberknife Center Munich Munich Germany
| | - M. Seitz
- Uroclinic Bogenhausen Munich Germany
| | | |
Collapse
|
4
|
Rodler S, Schott M, Tamalunas A, Marcon J, Graser A, Casuscelli J, Stief C, Fürweger C, Muacevic A, Staehler M. Safety and efficacy of Cyberknife radiosurgery for visceral and lymph node metastases of renal cell carcinoma – a retrospective, single center analysis. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33445-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
5
|
Hellbach K, Sterzik A, Sommer W, Karpitschka M, Hummel N, Casuscelli J, Ingrisch M, Schlemmer M, Graser A, Staehler M. Dual energy CT allows for improved characterization of response to antiangiogenic treatment in patients with metastatic renal cell cancer. Eur Radiol 2016; 27:2532-2537. [PMID: 27678131 DOI: 10.1007/s00330-016-4597-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 08/31/2016] [Accepted: 09/05/2016] [Indexed: 01/08/2023]
Abstract
OBJECTIVES To evaluate the potential role of dual energy CT (DECT) to visualize antiangiogenic treatment effects in patients with metastatic renal cell cancer (mRCC) while treated with tyrosine-kinase inhibitors (TKI). METHODS 26 patients with mRCC underwent baseline and follow-up single-phase abdominal contrast enhanced DECT scans. Scans were performed immediately before and 10 weeks after start of treatment with TKI. Virtual non-enhanced (VNE) and colour coded iodine images were generated. 44 metastases were measured at the two time points. Hounsfield unit (HU) values for VNE and iodine density (ID) as well as iodine content (IC) in mg/ml of tissue were derived. These values were compared to the venous phase DECT density (CTD) of the lesions. Values before and after treatment were compared using a paired Student's t test. RESULTS Between baseline and follow up, mean CTD and DECT-derived ID both showed a significant reduction (p < 0.005). The relative reduction measured in percent was significantly greater for ID than for CTD (49.8 ± 36,3 % vs. 29.5 ± 20.8 %, p < 0.005). IC was also significantly reduced under antiangiogenic treatment (p < 0.0001). CONCLUSIONS Dual energy CT-based quantification of iodine content of mRCC metastases allows for significantly more sensitive and reproducible detection of antiangiogenic treatment effects. KEY POINTS • A sign of tumour response to antiangiogenic treatment is reduced tumour perfusion. • DECT allows visualizing iodine uptake, which serves as a marker for vascularization. • More sensitive detection of antiangiogenic treatment effects in mRCC is possible.
Collapse
Affiliation(s)
- K Hellbach
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - A Sterzik
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - W Sommer
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - M Karpitschka
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - N Hummel
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - J Casuscelli
- Department of Urology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - M Ingrisch
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - M Schlemmer
- Department of Palliative Care, Krankenhaus Barmherzige Brüder München, Romanstr. 93, 80639, München, Germany
| | - A Graser
- Department of Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany
| | - Michael Staehler
- Department of Urology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr. 15, 81377, München, Germany.
| |
Collapse
|
6
|
Strobl FF, D'Anastasi M, Hinzpeter R, Franke PS, Trumm CG, Waggershauser T, Staehler M, Clevert DA, Reiser M, Graser A, Paprottka PM. Renal Pseudoaneurysms and Arteriovenous Fistulas as a Complication of Nephron-Sparing Partial Nephrectomy: Technical and Functional Outcomes of Patients Treated With Selective Microcoil Embolization During a Ten-Year Period. ROFO-FORTSCHR RONTG 2016; 188:188-94. [PMID: 26756934 DOI: 10.1055/s-0041-110136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE The aim of this study was to evaluate the clinical and functional outcomes in patients who underwent selective interventional embolization of renal pseudoaneurysms or arteriovenous fistulas at our center. MATERIALS AND METHODS Our retrospective analysis included all consecutive patients who received selective transcatheter embolization of renal pseudoaneurysms or arteriovenous fistulas after partial nephrectomy in our department from January, 2003 to September, 2013. The technical and clinical success rate and functional outcome of every procedure was collected and analyzed. Furthermore, the change in renal parenchymal volume before and after embolization was determined in a subgroup. RESULTS A total of 1425 patients underwent partial nephrectomy at our hospital. Of these, 39 (2.7 %) were identified with a pseudoaneurysm or an arteriovenous fistula after partial nephrectomy. The diagnosis of the vascular lesions was made by means of biphasic CT or CEUS. Technical success by means of selective microcoil embolization was achieved in all 39 patients (100 %). Clinical success, defined as no need for further operation or nephrectomy during follow-up, was achieved in 35 of 39 patients (85.7 %). Renal function, as measured by eGFR before and after the intervention, did not change significantly. However, a mean loss of parenchymal volume of 25.2 % was observed in a subgroup. No major or minor complications were attributable to the embolization procedure. CONCLUSION Transcatheter embolization is a promising method for treating vascular complications which may occur after partial nephrectomy. We confirm the high success rate of this technique while discussing renal functional outcomes and potential safety aspects. KEY POINTS Arterial pseudoaneurysms and arteriovenous fistulas are rare but severe complications after partial nephrectomy. Selective microcoil embolization is a safe and effective kidney-preserving procedure for treating these complications. Embolization leads to a significant loss of renal parenchymal volume but not to a loss of renal function.
Collapse
Affiliation(s)
- F F Strobl
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - M D'Anastasi
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - R Hinzpeter
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - P S Franke
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - C G Trumm
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - T Waggershauser
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - M Staehler
- Department of Urology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - D A Clevert
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - M Reiser
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - A Graser
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - P M Paprottka
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| |
Collapse
|
7
|
Spek A, Strittmatter F, Graser A, Kufer P, Stief C, Staehler M. Dual energy can accurately differentiate uric acid-containing urinary calculi from calcium stones. World J Urol 2016; 34:1297-302. [PMID: 26749082 DOI: 10.1007/s00345-015-1756-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 12/22/2015] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To retrospectively evaluate the accuracy of dual-energy CT (DECT) in the detection of the chemical composition of urinary calculi in correlation with infrared spectroscopic stone analysis. METHODS We reviewed the CT scans of 255 patients who underwent DECT due to a clinical suspicion of urolithiasis. Out of this group, we included 64 patients with clinically symptomatic urolithiasis requiring stone removal. After surgical removal of the stone by ureterorenoscopy, chemical composition was analyzed with infrared spectroscopy. We correlated DECT stone characterization results with chemical stone composition based on dual-energy indices (DEI). A total of 213 renal and ureteral stones could be removed and chemically analyzed. RESULTS A total of 213 calculi were evaluated. Thirty eight out of sixty four (59 %) patients had >1 stone. DECT was used to differentiate stones by using DEI. Stones harboring calcium (CA) were color-coded in blue, while stones containing uric acid (UA) were colored red. Median DEI in UA-containing stones were 0.001. Non-UA-containing stones had a DEI between 0.073 for pure CA stones and 0.077 containing CA and other substances (p = 0.001; p = 0.03, respectively). Sensitivity of DECT was 98.4 % for differentiation of UA from non-UA-containing calculi. Specificity was 98.1 %. Mean effective radiation dose of DECT was 4.18 mSv (0.44-14.27 mSv), thus comparable to conventional CT scans of the abdomen. Conventional measurement of Hounsfield units did not correlate with stone composition. CONCLUSION DECT with image post-processing reliably discriminates UA-containing calculi from all other stones, but the study offered limitations. Discrimination within the non-UA stones cannot be reliably achieved but is clinically insignificant.
Collapse
Affiliation(s)
- A Spek
- Department of Urology, University Hospitals Munich, Campus Grosshadern, Munich, Germany.
| | - F Strittmatter
- Department of Urology, University Hospitals Munich, Campus Grosshadern, Munich, Germany
| | - A Graser
- Department of Radiology, University Hospitals Munich, Campus Grosshadern, Munich, Germany
| | - P Kufer
- Department of Urology, University Hospitals Munich, Campus Grosshadern, Munich, Germany
| | - C Stief
- Department of Urology, University Hospitals Munich, Campus Grosshadern, Munich, Germany
| | - M Staehler
- Department of Urology, University Hospitals Munich, Campus Grosshadern, Munich, Germany
| |
Collapse
|
8
|
Graser A, Ekici AB, Sopel N, Melichar VO, Zimmermann T, Papadopoulos NG, Taka S, Ferrazzi F, Vuorinen T, Finotto S. Rhinovirus inhibits IL-17A and the downstream immune responses in allergic asthma. Mucosal Immunol 2016; 9:1183-92. [PMID: 26732679 PMCID: PMC7099698 DOI: 10.1038/mi.2015.130] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 11/09/2015] [Indexed: 02/04/2023]
Abstract
The proinflammatory cytokine interleukin-17A (IL-17A) is known to mediate antimicrobial activity, but its role during rhinovirus (RV) infections and in asthma needs further investigation. Therefore, we addressed the role of IL-17A during allergic asthma and antiviral immune response in human and murine immunocompetent cells. In this study we found that asthmatic children with a RV infection in their upper airways have upregulated mRNA levels of the antiviral cytokine interferon type I (IFN)-β and the transcription factor T-box 21 (TBX21) and reduced levels of IL-17A protein in their peripheral blood mononuclear cells (PBMCs). We also found that IL-17A inhibited RV1b replication in infected human lung epithelial cells A549. Furthermore, by using gene array analysis we discovered that targeted deletion of Il17a in murine lung CD4(+) T cells impaired Oas1g mRNA downstream of Ifnβ, independently from RV infection. Additionally, in PBMCs of children with a RV infection in their nasalpharyngeal fluid OAS1 gene expression was found downregulated. Finally RV1b inhibited IL-17A production in lung CD4(+) T cells in a setting of experimental asthma. These results indicate that the RV1b inhibits IL-17A in T helper type 17 cells and IL-17A clears RV1b infection in epithelial cells. In both cases IL-17A contributes to fend off RV1b infection by inducing genes downstream of interferon type I pathway.
Collapse
Affiliation(s)
- A Graser
- grid.411668.c0000 0000 9935 6525Department of Molecular Pneumology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - A B Ekici
- grid.411668.c0000 0000 9935 6525Institute of Humangenetics, Universitätsklinikum Erlangen, Erlangen, Germany
| | - N Sopel
- grid.411668.c0000 0000 9935 6525Department of Molecular Pneumology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - V O Melichar
- grid.411668.c0000 0000 9935 6525Department of Paediatrics and Adolescent Medicine, Paediatric Pneumology-Allergology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - T Zimmermann
- grid.411668.c0000 0000 9935 6525Department of Paediatrics and Adolescent Medicine, Paediatric Pneumology-Allergology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - N G Papadopoulos
- grid.5216.00000 0001 2155 0800Allergy and Clinical Immunology Unit, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - S Taka
- grid.5216.00000 0001 2155 0800Allergy and Clinical Immunology Unit, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - F Ferrazzi
- grid.411668.c0000 0000 9935 6525Institute of Humangenetics, Universitätsklinikum Erlangen, Erlangen, Germany
| | - T Vuorinen
- grid.1374.10000 0001 2097 1371Department of Virology, University of Turku, Turku, Finland
| | - S Finotto
- grid.411668.c0000 0000 9935 6525Department of Molecular Pneumology, Universitätsklinikum Erlangen, Erlangen, Germany
| |
Collapse
|
9
|
Schiergens TS, Koch JG, Khalil PN, Graser A, Zügel NP, Jauch KW, Kleespies A. Right-sided diaphragmatic rupture after repair of a large Morgagni hernia. Hernia 2015; 19:671-675. [PMID: 26405726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a case of a combination of primary and secondary diaphragmatic hernia in a 63-year male patient. For progressive dyspnea and palpitations caused by a large and symptomatic Morgagni hernia resulting in a right-sided enterothorax, an open tension-free mesh repair was performed. The postoperative course was complicated by a secondary hepatothorax through a spontaneous rupture of the right diaphragm. Primary mesh repair of the Morgagni hernia, however, proved to be sufficient. This recurrent herniation might be a consequence of (1) preexisting atrophy of the right diaphragm caused by disposition and/or long-term diaphragmatic dysfunction due to the large hernia, combined with (2) further thinning out of the diaphragm by intraoperative hernia sac resection, and (3) postoperative increase of intra-abdominal pressure.
Collapse
|
10
|
Helck A, Hummel N, Meinel FG, Johnson T, Nikolaou K, Graser A. Can single-phase dual-energy CT reliably identify adrenal adenomas? Eur Radiol 2014; 24:1636-42. [DOI: 10.1007/s00330-014-3192-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 03/10/2014] [Accepted: 04/15/2014] [Indexed: 10/25/2022]
|
11
|
Graser A. Staging kolorektales Karzinom: was, wann, und auch leitliniengerecht? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
12
|
Helck A, Hummel N, Meinel F, Johnson T, Reiser M, Graser A. Diagnostik von Nebennierenadenomen mithilfe von Dual Energy CT basierten virtuellen Nativbildern. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Sterzik A, Staehler M, Casuscelli J, Karpitschka M, Reiser M, Graser A. Frühes Monitoring der antivaskulären Effekte von Multikinase-Inhibitoren (MKI) bei Patienten mit metastasiertem Nierenzellkarzinom (mNZK) mittels Perfusions-CT: Initiale Ergebnisse einer Pilotstudie. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
14
|
Graser A. Protokolle "from head to toe". ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
15
|
Weßling J, Schülke C, Koch R, Kohlhase N, Wassenaar L, Mesters R, Höink AJ, D Anastasi M, Karpitschka M, Fabel M, Wulff AM, Pinto dos Santos D, Kiessling A, Graser A, Bornemann L, Dicken V, Heindel W, Buerke B. Therapy response evaluation of malignant lymphoma in a multicenter study: comparison of manual and semiautomatic measurements in CT. ROFO-FORTSCHR RONTG 2014; 186:768-79. [PMID: 24497088 DOI: 10.1055/s-0033-1356424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE Comparison of manual one-/bi-dimensional measurements versus semi-automatically derived one-/bi-dimensional and volumetric measurements for therapy response evaluation of malignant lymphoma during CT follow-up examinations in a multicenter setting. MATERIALS AND METHODS MSCT data sets of patients with malignant lymphoma were evaluated before (baseline) and after two cycles of chemotherapy (follow-up) at radiological centers of five university hospitals. The long axis diameter (LAD), the short axis diameter (SAD) and the bi-dimensional WHO of 307 target lymph nodes were measured manually and semi-automatically using dedicated software. Lymph node volumetry was performed semi-automatically only. The therapeutic response was evaluated according to lymphoma-adapted RECIST. RESULTS Based on a single lymph node, semi-automatically derived multidimensional parameters allowed for significantly more accurate therapy response classification than the manual or the semi-automatic unidimensional parameters. Incorrect classifications were reduced by up to 9.6%. Compared to the manual approach, the influence of the study center on correct therapy classification is significantly less relevant when using semi-automatic measurements. CONCLUSION Semi-automatic volumetry and bi-dimensional WHO significantly reduce the number of incorrectly classified lymphoma patients by approximately 9.6% in the multicenter setting in comparison to linear parameters. Semi-automatic quantitative software tools may help to significantly reduce wrong classifications that are associated with the manual assessment approach. KEY POINTS ► Semi-automatic volumetry and bi-dimensional WHO significantly reduce the number of incorrectly classified lymphoma patients ► Manual lymph node evaluation with uni-dimensional parameters is inferior to semi-automatic analysis in a multicenter setting ► Semi-automatic quantitative software tools should be introduced in clinical study evaluation.
Collapse
Affiliation(s)
- J Weßling
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - C Schülke
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - R Koch
- Dept. of Medical Informatics and Biomathematics, University of Muenster, Germany
| | - N Kohlhase
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - L Wassenaar
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - R Mesters
- Dept. of Oncology, University of Muenster, Germany
| | - A J Höink
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - M D Anastasi
- Dept. of Clinical Radiology, University of Munich, Germany
| | - M Karpitschka
- Dept. of Clinical Radiology, University of Munich, Germany
| | - M Fabel
- Clinic for Diagnostic Radiology, University Hospital Schleswig-Holstein Campus Kiel, Germany
| | - A M Wulff
- Clinic for Diagnostic Radiology, University Hospital Schleswig-Holstein Campus Kiel, Germany
| | - D Pinto dos Santos
- Department for Diagnostic and Interventional Radiology, University of Mainz, Germany
| | - A Kiessling
- Dept. of Diagnostic Radiology, University of Marburg, Germany
| | - A Graser
- Dept. of Clinical Radiology, University of Munich, Germany
| | | | - V Dicken
- MEVIS, Fraunhofer, Bremen, Germany
| | - W Heindel
- Dept. of Clinical Radiology, University of Muenster, Germany
| | - B Buerke
- Dept. of Clinical Radiology, University of Muenster, Germany
| |
Collapse
|
16
|
Abstract
If a renal mass is suspected on clinical examination or ultrasound the finding has to be confirmed by cross-sectional imaging. Methods that are used include multidetector-row computed tomography (MDCT) and magnetic resonance imaging (MRI). Also contrast-enhanced ultrasound has been successfully implemented in renal imaging and now plays a major role in the differentiation of benign from malignant renal masses. In expert hands it can be used to show very faint vascularization and subtle enhancement. The MDCT technique benefits from the recently introduced dual energy technology that allows superior characterization of renal masses in a single-phase examination, thereby greatly reducing radiation exposure. For young patients and persons allergic to iodine MRI should be used and it provides excellent soft tissue contrast and visualizes contrast enhancement kinetics in multiphase examinations.This article aims at giving a comprehensive overview of these different imaging modalities, their clinical indications and contraindications, as well as a description of imaging findings of various renal masses.
Collapse
Affiliation(s)
- D-A Clevert
- Institut für Klinische Radiologie, Klinikum der Universität München, Marchioninistraße 15, 81377 München, Deutschland
| | | | | | | | | |
Collapse
|
17
|
Schiergens TS, Koch JG, Khalil PN, Graser A, Zügel NP, Jauch KW, Kleespies A. Right-sided diaphragmatic rupture after repair of a large Morgagni hernia. Hernia 2013; 19:671-675. [PMID: 24121842 DOI: 10.1007/s10029-013-1167-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 10/03/2013] [Indexed: 11/28/2022]
Abstract
We present a case of a combination of primary and secondary diaphragmatic hernia in a 63-year male patient. For progressive dyspnea and palpitations caused by a large and symptomatic Morgagni hernia resulting in a right-sided enterothorax, an open tension-free mesh repair was performed. The postoperative course was complicated by a secondary hepatothorax through a spontaneous rupture of the right diaphragm. Primary mesh repair of the Morgagni hernia, however, proved to be sufficient. This recurrent herniation might be a consequence of (1) preexisting atrophy of the right diaphragm caused by disposition and/or long-term diaphragmatic dysfunction due to the large hernia, combined with (2) further thinning out of the diaphragm by intraoperative hernia sac resection, and (3) postoperative increase of intra-abdominal pressure.
Collapse
Affiliation(s)
- T S Schiergens
- Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, University of Munich, Campus Grosshadern, Marchioninistr. 15, 81377, Munich, Germany,
| | | | | | | | | | | | | |
Collapse
|
18
|
Herold C, Reiser M, Graser A. Onkologische Bildgebung. Radiologe 2013; 53:302. [DOI: 10.1007/s00117-012-2415-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
19
|
D’Anastasi M, Schramm N, Reiser M, Graser A. Kriterien für die radiologische Beurteilung des Therapieansprechens. Radiologe 2013; 53:322-8. [DOI: 10.1007/s00117-012-2435-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
20
|
Karpitschka M, Augart D, Becker HC, Reiser M, Graser A. Dose reduction in oncological staging multidetector CT: effect of iterative reconstruction. Br J Radiol 2013; 86:20120224. [PMID: 23255541 DOI: 10.1259/bjr.20120224] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE To compare radiation exposure and image quality of oncological staging multidetector CT (MDCT) examinations of the chest, abdomen and pelvis with and without iterative reconstruction (IR). METHODS 40 patients with known malignancy underwent staging CT examinations at two time points. Both CT scans were performed on the same scanner (SOMATOM® Definition Flash, Siemens Healthcare, Forchheim, Germany). For the baseline scan, the tube current-time product was set to 250 mAs [image reconstruction: filtered back projection (FBP)] and for the follow-up scan to 150 mAs [reconstruction: iterative reconstruction (IR)]. Effective radiation doses were estimated based on dose-length products for both baseline and follow-up. Noise measurements in defined regions were compared for FBP and IR. Images were also subjectively evaluated for image quality by three radiologists with different levels of experience. RESULTS Dose reduction was 44.4±8.2% for reduced-dose CT scans with IR compared with baseline with FBP. Image noise was not significantly different between images reconstructed with FBP and IR. The subjective quality of standard-dose FBP images and reduced-dose iteratively reconstructed CT images were identical. CONCLUSION Our results show the dose-reducing potential of IR of CT image data in oncological patients. ADVANCES IN KNOWLEDGE The algorithm tested in the present scientific study allows a >45% dose reduction at maintained image quality.
Collapse
Affiliation(s)
- M Karpitschka
- Department of Clinical Radiology, Ludwig-Maximilians-University Munich, Munich, Germany.
| | | | | | | | | |
Collapse
|
21
|
Braunagel M, Schwarz F, Knösel T, Reiser MF, Graser A. [Unclear abdominal tumor in pulmonary lymphangioleiomyomatosis]. Radiologe 2012. [PMID: 23178789 DOI: 10.1007/s00117-012-2414-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M Braunagel
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität München, Campus Grosshadern, Deutschland.
| | | | | | | | | |
Collapse
|
22
|
Meinel FG, Schramm N, Haug AR, Graser A, Reiser MF, Rist C. [Importance of PET/CT for imaging of colorectal cancer]. Radiologe 2012; 52:529-36. [PMID: 22618625 DOI: 10.1007/s00117-011-2284-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
CLINICAL/METHODICAL ISSUE Fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) has emerged as a very useful imaging modality in the management of colorectal carcinoma. Data from the literature regarding the role of PET/CT in the initial diagnosis, staging, radiotherapy planning, response monitoring and surveillance of colorectal carcinoma is presented. Future directions and economic aspects are discussed. STANDARD RADIOLOGICAL METHODS Computed tomography (CT), magnetic resonance imaging (MRI) and FDG-PET for colorectal cancer and endorectal ultrasound for rectal cancer. METHODICAL INNOVATIONS Combined FDG-PET/CT. PERFORMANCE While other imaging modalities allow superior visualization of the extent and invasion depth of the primary tumor, PET/CT is most sensitive for the detection of distant metastases of colorectal cancer. ACHIEVEMENTS We recommend a targeted use of PET/CT in cases of unclear M staging, prior to metastasectomy and in suspected cases of residual or recurrent colorectal carcinoma with equivocal conventional imaging. The role of PET/CT in radiotherapy planning and response monitoring needs to be determined. Currently there is no evidence to support the routine use of PET/CT for colorectal screening, staging or surveillance. PRACTICAL RECOMMENDATIONS To optimally exploit the synergy between morphologic and functional information, FDG-PET should generally be performed as an integrated FDG-PET/CT with a contrast-enhanced CT component in colorectal carcinoma.
Collapse
Affiliation(s)
- F G Meinel
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität München, Campus Großhadern, Marchioninistr. 15, 81377, München, Deutschland.
| | | | | | | | | | | |
Collapse
|
23
|
Buerke B, Graser A, Fabel M, Pinto dos Santos P, Kiessling A, Schülke C, Heindel W, Weßling J. Therapieansprechen maligner Lymphome in der CT: Sollten manuelle 2D durch semi-automatische 3D Messungen ersetzt werden? Ergebnisse einer Multicenter Studie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
24
|
Berger F, Reiser M, Graser A. Bildgebende Diagnostik und Visualisierung von Bestrahlungsfolgen bei Weichteilsarkomen. Radiologe 2012; 52:222-8. [DOI: 10.1007/s00117-011-2193-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Graser A, Bogoni L, Macari M, Mang T. Computer-assistierte Detektion von Kolonpolypen in der CT-Kolonographie: Multizentrische Evaluation. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
26
|
Karpitschka M, Augart D, Becker C, Reiser MF, Graser A. Dosisreduktion bei onkologischen CT-Staginguntersuchungen durch iterative Bilddatenrekonstruktion. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
27
|
Abstract
Management of kidney injuries is an uncommon challenge to urologists. Therapy has evolved in recent years from mainly surgical to predominantly conservative treatment. Immediate surgical intervention for renal trauma is now only necessary in rare instances. This overview is based on the guidelines of the European Association of Urology and the Societé International d'Urologie as well as clinical experience and is intended to provide practical advice for treatment of renal trauma.
Collapse
Affiliation(s)
- M Staehler
- Urologische Klinik und Poliklinik, Ludwig-Maximilians-Universität München, Klinikum Grosshadern, Marchioninistrasse 15, Munich, Germany.
| | | | | | | | | | | | | |
Collapse
|
28
|
Graser A, Becker CR, Nikolaou K, Mang T. 3D CT-Kolonographie (CTK): Vergleich von diagnostischer Genauigkeit und Befundungszeit zwischen Standard-3D-Software und virtueller Dissektionstechnik. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
29
|
Graser A, Schoepf UJ, Huda W, Reiser M, Becker CR. Strahlenexposition und Organdosen bei CT-Kolonographie in Niedrigdosistechnik. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
30
|
Sommer W, Schenzle JC, Becker CR, Neumaier K, Nikolaou K, Graser A, Reiser M, Johnson TR. Dosiseinsparung bei Triple-Rule-Out Protokollen durch hohe Pitch-Faktoren. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
31
|
Abstract
CT colonography (CTC) is also referred to as virtual colonoscopy and is being used with increasing frequency in radiological practice. While there are still no generally accepted, clear-cut indications for its use in mass colorectal cancer screening, there is evidence that this investigation is useful in patients in whom colonoscopy has not been successful or who have known stenotic lesions in the colon. Recent results of significant comparative studies of CTC and conventional colonoscopy will have some influence on the future place of CTC in screening for cancer of the bowel; they show the great potential of CT-aided bowel examination.
Collapse
Affiliation(s)
- A Graser
- Institut für Klinische Radiologie, Klinikum Grosshadern der LMU München, Marchioninistr. 15, 81377, München.
| | | | | | | |
Collapse
|
32
|
Johnson TR, Morhard D, Fink C, Graser A, Reiser MF, Becker CR. Knochenentfernung aus CT-Angiographien mittels Dual Energy CT. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
33
|
Graser A, Kolligs FT, Schäfer C, Reiser MF, Becker CR, Mang T. Vergleich der diagnostischen Genauigkeit verschiedener 3D-Visualisierungen in der CT-Kolonographie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
34
|
Graser A, Staehler M, Nikolaou K, Reiser MF, Becker CR, Johnson TR. Dual Energy CT bei Patienten mit Nierentumoren: Histopathologische Korrelation, diagnostische Genauigkeit und Strahlenexposition. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
35
|
Graser A, Stieber P, Nagel D, Schäfer C, Horst D, Becker CR, Nikolaou K, Lottes A, Geisbüsch S, Kramer H, Wagner AC, Diepolder H, Schirra J, Roth HJ, Seidel D, Göke B, Reiser MF, Kolligs FT. Comparison of CT colonography, colonoscopy, sigmoidoscopy and faecal occult blood tests for the detection of advanced adenoma in an average risk population. Gut 2009; 58:241-8. [PMID: 18852257 DOI: 10.1136/gut.2008.156448] [Citation(s) in RCA: 290] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS This prospective trial was designed to compare the performance characteristics of five different screening tests in parallel for the detection of advanced colonic neoplasia: CT colonography (CTC), colonoscopy (OC), flexible sigmoidoscopy (FS), faecal immunochemical stool testing (FIT) and faecal occult blood testing (FOBT). METHODS Average risk adults provided stool specimens for FOBT and FIT, and underwent same-day low-dose 64-multidetector row CTC and OC using segmentally unblinded OC as the standard of reference. Sensitivities and specificities were calculated for each single test, and for combinations of FS and stool tests. CTC radiation exposure was measured, and patient comfort levels and preferences were assessed by questionnaire. RESULTS 221 adenomas were detected in 307 subjects who completed CTC (mean radiation dose, 4.5 mSv) and OC; 269 patients provided stool samples for both FOBT and FIT. Sensitivities of OC, CTC, FS, FIT and FOBT for advanced colonic neoplasia were 100% (95% CI 88.4% to 100%), 96.7% (82.8% to 99.9%), 83.3% (95% CI 65.3% to 94.4%), 32% (95% CI 14.9% to 53.5) and 20% (95% CI 6.8% to 40.7%), respectively. Combination of FS with FOBT or FIT led to no relevant increase in sensitivity. 12 of 45 advanced adenomas were smaller than 10 mm. 46% of patients preferred CTC and 37% preferred OC (p<0.001). CONCLUSIONS High-resolution and low-dose CTC is feasible for colorectal cancer screening and reaches sensitivities comparable with OC for polyps >5 mm. For patients who refuse full bowel preparation and OC or CTC, FS should be preferred over stool tests. However, in cases where stool tests are performed, FIT should be recommended rather than FOBT.
Collapse
Affiliation(s)
- A Graser
- Department of Clinical Radiology, University of Munich, Klinikum Grosshadern, Munich, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Affiliation(s)
- C Schäfer
- Medical Clinic II, University of Munich, Campus Grosshadern, Munich, Germany.
| | | | | |
Collapse
|
37
|
Mang T, Graser A, Imhof H, Reiser M. Moderne Kolondiagnostik. Radiologe 2008; 48:117. [DOI: 10.1007/s00117-007-1613-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
38
|
Clevert DA, Graser A, Jung E, Stickel M, Reiser M. Value of ultrasound in the diagnosis of aneurysms of the extracranial internal carotid arteries. Clin Hemorheol Microcirc 2008. [DOI: 10.3233/ch-2008-1076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- D.-A. Clevert
- Department of Clinical Radiology, University of Munich – Grosshadern Campus, Germany
| | - A. Graser
- Department of Clinical Radiology, University of Munich – Grosshadern Campus, Germany
| | - E.M. Jung
- Department of Clinical Diagnostic Radiology, University of Regensburg, Germany
| | - M. Stickel
- Department of Surgery, University of Munich – Grosshadern Campus, Germany
| | - M. Reiser
- Department of Clinical Radiology, University of Munich – Grosshadern Campus, Germany
| |
Collapse
|
39
|
Graser A, Johnson TR, Staehler M, Reiser M, Stief C, Becker CR. Kann die Nativphase bei der Untersuchung von Patienten mit Nierentumoren durch die virtuellen Nativbilder eines Dual Energy-Scans ersetzt warden? ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
40
|
Johnson TR, Graser A, Bader M, Stähler M, Haseke N, Stief CG, Reiser M, Becker CR. Dual Energy CT Typisierung von Nierensteinen in vitro und in vivo. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
41
|
Graser A, Stieber P, Becker CR, Geisbüsch S, Schäfer C, Reiser M, Göke B, Kolligs FT. Prospektiver Vergleich von Koloskopie, CT-Kolonographie, Sigmoidoskopie und Tests auf okkultes Blut im Stuhl in der Detektion von Kolonadenomen bei asymptomatischen Personen. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
42
|
Clevert DA, Graser A, Jung EM, Stickel M, Reiser M. Value of ultrasound in the diagnosis of aneurysms of the extracranial internal carotid arteries. Clin Hemorheol Microcirc 2008; 39:133-146. [PMID: 18503119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Aneurysms of the extracranial carotid arteries are a rare abnormalitiy and may represent a diagnostic challenge in examination of the patients. B-flow is a new digital vascular ultrasound technique and is an especially reliable method in the diagnosis of the extracranial portion of the internal carotid arteries as it shows less flow artifacts than color-coded Doppler sonography (CCDS) and power Doppler (PD). This review compares color-coded Doppler sonography, power Doppler and B-flow findings in extracranial ICA and CA aneurysm to emphasize the usefulness of B-flow in this clinical condition.
Collapse
Affiliation(s)
- D-A Clevert
- Department of Clinical Radiology, University of Munich - Grosshadern Campus, Germany.
| | | | | | | | | |
Collapse
|
43
|
Wiedemann K, Graser A, Lang RA, Rader T, Suckfuell M. [Persistent pharyngeocutaneous fistula after transcervical resection of a diverticulum of the hypopharynx]. HNO 2007; 57:1275-9. [PMID: 17882393 DOI: 10.1007/s00106-007-1613-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
CASE A 26-year-old white male patient had undergone resection of a diverticulum of the hypopharynx and myotomy of the cricopharyngeal muscle elsewhere. A transcervical approach had been chosen owing to the presence of an arteria lusoria and the associated risk of vessel injury. The patient had subsequently had recurrent fistulas through the skin incision, which had not resolved despite four further operations. He presented in our department with significant weight loss and persistent retrosternal pain. Esophageal manometry revealed that resting muscle tone in the upper esophageal sphincter was still significantly elevated. Assuming that the earlier myotomy had not been completely successful, we decided to complete this operation as revision surgery. The pharynx was closed with a running suture using the Conley technique. The fistula healed, and there were no further recurrences. CONCLUSION Complete and careful dissection of all muscle fibers back to the mucosa is essential, as well as complete removal of the diverticulum if this operation is to be successful when performed by the transcutaneous approach. Recurrent diverticula are not the only possible complication; persistent pharyngeocutaneous fistulas can also arise.
Collapse
Affiliation(s)
- K Wiedemann
- Klinik für Hals-, Nasen- und Ohrenheilkunde, Ludwig-Maximilians-Universität, Marchioninistrasse 15, 81377, München, Deutschland
| | | | | | | | | |
Collapse
|
44
|
Abstract
About 5% of injuries of the urinary tract affect the renal pelvis and ureter and constitute a severe complication. Around 75% of these injuries are iatrogenic and only about 25% are caused by blunt abdominal trauma or perforation. To avoid complications and improve prognosis, immediate diagnosis and therapy are essential. The diagnostic accuracy of preoperative studies is low, therefore frequently injuries are detected during explorative laparotomy. The management of upper urinary tract lesions depends on severity and localization, whereas the ultimate ambition should always be the preservation of the kidney. As a basic rule, ureteral stenting is mostly sufficient for small lesions, and only larger injuries require open reconstructive techniques. Longitudinal studies document a high degree of functional reconstitution if adequate and immediate treatment is carried out.
Collapse
Affiliation(s)
- M Trottmann
- Urologische Klinik und Poliklinik, Klinikum der Ludwig-Maximilians-Universität München-Grosshadern, 81377, München.
| | | | | | | | | | | | | |
Collapse
|
45
|
Graser A, Kolligs FT, Mang T, Schaefer C, Geisbüsch S, Reiser MF, Becker CR. Computer-aided detection in CT colonography: initial clinical experience using a prototype system. Eur Radiol 2007; 17:2608-15. [PMID: 17429646 DOI: 10.1007/s00330-007-0579-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Revised: 12/11/2006] [Accepted: 01/08/2007] [Indexed: 01/08/2023]
Abstract
Computer-aided detection (CAD) algorithms help to detect colonic polyps at CT colonography (CTC). The purpose of this study was to evaluate the accuracy of CAD versus an expert reader in CTC. One hundred forty individuals (67 men, 73 women; mean age, 59 years) underwent screening 64-MDCT colonography after full cathartic bowel cleansing without fecal tagging. One expert reader interpreted supine and prone scans using a 3D workstation with integrated CAD used as "second reader." The system's sensitivity for the detection of polyps, the number of false-positive findings, and its running time were evaluated. Polyps were classified as small (< or =5 mm), medium (6-9 mm), and large (> or =10 mm). A total of 118 polyps (small, 85; medium, 19; large, 14) were found in 56 patients. CAD detected 72 polyps (61%) with an average of 2.2 false-positives. Sensitivity was 51% (43/85) for small, 90% (17/19) for medium, and 86% (12/14) for large polyps. For all polyps, per-patient sensitivity was 89% (50/56) for the radiologist and 73% (41/56) for CAD. For large and medium polyps, per-patient sensitivity was 100% for the radiologist, and 96% for CAD. In conclusion, CAD shows high sensitivity in the detection of clinically significant polyps with acceptable false-positive rates.
Collapse
Affiliation(s)
- A Graser
- Department of Clinical Radiology, University of Munich, Grosshadern Campus, Marchioninistr. 15, 81377, Munich, Germany.
| | | | | | | | | | | | | |
Collapse
|
46
|
Graser A, Schaefer C, Geisbüsch S, Becker CR, Kramer H, Reiser MF, Kolligs FT. Vergleich von Haemoccult-Test, 64-Zeilen-Multidetektor-CT-Kolonographie und konventioneller Koloskopie beim Darmkrebsscreening: Ergebnisse der “Münchner Darmkrebs-Vorsorgestudie“. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
47
|
Graser A, Becker CR, Reiser MF, Kolligs FT. Zeitsparende 3D-Befundung bei der CT-Kolonographie mittels einer neuartigen Visualisierungstechnik. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
48
|
Graser A, Reiser MF, Becker CR. Computerunterstützte Diagnose (CAD) in der CT-Kolonographie. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
49
|
Koebernik C, Graser A, Neulen J, Motejlek K. An der Regulation der Vaskularisierung des menschlichen Corpus luteum sind wahrscheinlich NF-κB Transkriptionsfaktoren beteiligt. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
50
|
Graser A, Koebernik C, Neulen J, Motejlek K. Zur Regulation der Angiogenese im menschlichen Corpus luteum werden wahrscheinlich AP-1 Transkriptionsfaktoren benötigt. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|