76
|
Fritz J, Tzaribatchev N, Thomas C, Clasen S, Claussen CD, Lewin JS, Pereira PL. Hochfeld-MR-gesteuerte Steroid Infiltration der Temporomandibulargelenke zur Therapie der Kiefergelenkarthritis bei juveniler idiopathischer Arthritis: Ergebnisse bei 15 Kindern. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
77
|
Horger M, Fritz J, Vogel MN, Kümmerle-Deschner J, Tzaribatchev N, Holzer U, Claussen CD. Ganzkörper-MRT-Screening von Kindern mit neu aufgetretener Chronisch Rezidivierender Multifokaler Osteomyelitis: Korrelation mit labortechnischen und klinischen Daten. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1074000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
78
|
Clasen S, Rempp HJ, Boss A, Fritz J, Schraml C, Schick F, Claussen CD, Pereira PL. MRT-gestützte perkutane Radiofrequenz-Ablation unter Verwendung eines 1,5 Tesla MR-Tomographen mit breiter Magnetöffnung: Erste klinische Ergebnisse in der Behandlung von 60 Lebermetastasen. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
79
|
Hindupur S, Yeung M, Shroff P, Fritz J, Kirmani N. Vanishing bile duct syndrome in a patient with advanced AIDS. HIV Med 2007; 8:70-2. [PMID: 17305935 DOI: 10.1111/j.1468-1293.2007.00415.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A 39-year-old HIV-infected woman developed signs and symptoms of obstructive jaundice and cholestasis. Serological tests were positive for cytomegalovirus (CMV) infection. There was no evidence of AIDS cholangiopathy in ultrasonography or magnetic resonance cholangiopancreatography (MRCP). A liver biopsy revealed marked ductopenia and the patient was diagnosed with vanishing bile duct syndrome, thought to be secondary to CMV infection as a result of profound immunosuppression. To the best of our knowledge, this is the first reported case of vanishing bile duct syndrome diagnosed in a patient with HIV/AIDS.
Collapse
|
80
|
Fritz J, Pereira PL. MR-gesteuerte Schmerztherapie: Prinzipien und klinische Applikationen. ROFO-FORTSCHR RONTG 2007; 179:914-24. [PMID: 17705114 DOI: 10.1055/s-2007-963200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
X-ray fluoroscopy and computed tomography are frequently used to perform percutaneous interventions in pain therapy. The development of MR-compatible therapy needles now allows these interventions to be performed under MR imaging guidance. MR-guided interventions may be performed using most clinical MR scanners; however, systems with an open configuration are advantageous. Multiplanar pre- and intra-procedural MR imaging provides the interventionalist with essential information, such as evaluation of anatomy and pathology, as well as the planning of the procedure and monitoring of fluid distribution without the use of contrast agents. With the use of non-ionizing radiation, interventional MR imaging is especially suited for the treatment of children and young adults as well as for serial injection therapy. For spinal MR interventions, passive needle visualization is an easily achievable and reliable method. The resulting needle artifact is influenced by several factors such as the alloy of the needle, the strength of the static magnetic field, the sequence type, the spatial orientation of the therapy needle as well as the echo time and may further be optimized during the intervention by alteration of the last three factors. Fast acquisition techniques and image processing allow for continuous, near real-time MR imaging (so-called MR fluoroscopy) and interactive needle navigations, comparable to X-ray fluoroscopy and CT fluoroscopy. The purpose of this review is to illustrate and discuss general concepts of interventional MR imaging. A spectrum of interventional MR imaging procedures in spinal pain therapy is described and illustrated, including procedures such as lumbar facet joint injections, sacroiliac joint injections, lumbar spinal nerve root infiltrations and drug delivery to the lumbar sympathetic chain.
Collapse
|
81
|
Pereira PL, Kastler B, Wiskirchen J, Clasen S, Fritz J. La résonance magnétique interventionnelle en pathologie ostéoarticulaire. ACTA ACUST UNITED AC 2007; 88:1230-7. [PMID: 17878867 DOI: 10.1016/s0221-0363(07)91331-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnetic resonance (MR) imaging is well established for the diagnosis of musculoskeletal diseases. The excellent tissue contrast and the multiplanar imaging capability have both contributed to the improvement of this technique. The development of fast acquisition techniques, sufficient patient access obtained with open magnet configurations and advances in the technology of MR compatible instruments allow a new approach to interventional radiology. These recently commercially available open-bored high-field magnets allow standard interventions such as biopsies or intra-articular infiltrations. Moreover, new interventions e.g. preoperative marking of soft tissue or bone marrow tumors are now possible with the better tissue contrast of MR imaging.
Collapse
|
82
|
Henes JC, Fritz J, Koch S, Klein R, Horger M, Risler T, Kanz L, Koetter I. Rituximab for treatment-resistant extensive Wegener`s granulomatosis—additive effects of a maintenance treatment with leflunomide. Clin Rheumatol 2007; 26:1711-5. [PMID: 17502992 DOI: 10.1007/s10067-007-0643-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Revised: 04/23/2007] [Accepted: 04/23/2007] [Indexed: 11/26/2022]
Abstract
Extensive Wegener's granulomatosis (WG) is treated by glucocorticosteroids (GC) and cyclophosphamide (CYC). In some cases, the disease is refractory to CYC. For those patients the depletion of B-lymphocytes with rituximab is a promising new treatment modality. This is a retrospective study of six patients receiving rituximab (RTX) with 4 x 375 mg/m(2) body surface weekly because of inefficacy of CYC. Proteinase-3-antineutrophil cytoplasmic antibodies (PR3-ANCA) and c-ANCAs were assessed. For clinical follow-up the Birmingham Vasculitis Activity Score for WG (BVAS/WG) was used. In five of the six cases, leflunomide (LEF) was given as maintenance treatment. Mean follow up was 16 months (12-21 months). The median PR3-ANCA titer fell from 36.8 U/ml at baseline to 21.4 U/ml after 3 months, 8.3 after 6 months, and 4.3 at month 12. The median BVAS/WG at baseline was 5 and 0 after 1 month. Two minor relapses could be noticed at month 3. After 6 months, one patient still had a BVAS of 1, all the others had a BVAS of 0. At month 18, a major relapse occurred in one patient, which was successfully retreated with RTX. The RTX infusions were well tolerated. Rituximab is a well-tolerated, very effective medication for patients with Wegener's granulomatosis. Leflunomide maintenance may increase the efficacy of rituximab and prolong the disease-free period.
Collapse
|
83
|
Ochs BG, Müller-Horvat C, Rolauffs B, Fritz J, Weise K, Schewe B. Einzeitige Rekonstruktion osteochondraler Defekte am Kniegelenk bei Osteochondrosis dissecans. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2007; 145:146-51. [PMID: 17492552 DOI: 10.1055/s-2007-965167] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIM The aim of this study was to establish and assess a one-step reconstruction procedure of deep osteochondral defects of the knee joint with bone grafting and matrix-supported autologous chondrocyte transplantation in osteochondritis dissecans. METHOD Between 2004 and 200622 patients with osteochondral defects in the weight-bearing zone of the femoral condyles(ICRS OCD III and IV) were reconstructed simultaneously with bone grafting and matrix-supported autologous chondrocyte transplantation (NOVOCART 3D). All patients were analysed prospectively. RESULTS 17 Males and 5 females(age 28.3, range: 17-49 years) were surgically treated with the above-mentioned novel method. Before reconstruction osteochondral defects had an average defect area of 4.8 (2.4-9.0) cm2 and a depth of between 4 and 15 mm. For reconstruction an average of 2.6 (1-6) monocortical cancellous bone cylinders (diameter 8mm) was used to fill the osseous defect and to reconstruct the subchondral bone plate with adequate positioning of the monocortical layer of the graft. Then a Matrix-ACT was used to cover the reconstructed subchondral bone plate. The average follow-up was 16 (6-36) months. The average Tegner activity score was 4 (3-7) of 10. The Lysholm-Gillquistscore and the Cincinnati Sports Medicine and Orthopedic Center score were significantly improved postoperatively. The IKDC-2000 questionnaire was also significantly increased by 50%. CONCLUSION The simultaneous reconstruction of deep osteochondral detects of the knee joint with bone grafting and matrix-supported autologous chondrocyte transplantation in osteochondritis dissecans is a biological, one-step alternative to previously reported methods with encouraging first results.
Collapse
|
84
|
Videan EN, Fritz J, Murphy J. Hunting and Occasional Consumption of Prey Items by Chimpanzees at the Primate Foundation of Arizona. INT J PRIMATOL 2007. [DOI: 10.1007/s10764-007-9126-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
85
|
Horger M, Fritz J, Bares R, Müssig K. [Diagnosis of hyperfunctioning adrenal masses]. ROFO-FORTSCHR RONTG 2007; 178:1171-6. [PMID: 17396301 DOI: 10.1055/s-2006-958814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
86
|
Clasen S, Geng A, Herberts T, Boss A, Schmidt D, Schraml C, Fritz J, Kröber SM, Claussen CD, Pereira PL. Intern gekühlte bipolare Radiofrequenzablation: Ist eine niedrige Leistung effektiver? ROFO-FORTSCHR RONTG 2007; 179:282-8. [PMID: 17301932 DOI: 10.1055/s-2006-927360] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE Evaluation of bipolar radiofrequency (RF) ablation using internally cooled electrodes in an ex-vivo experiment. MATERIALS AND METHODS Bipolar RF ablations (n = 154) were performed in ex-vivo bovine liver. Both electrodes with a total length of the active tip of 4 cm were located on the same shaft of an internally cooled applicator. The power output was systematically varied between 20 and 100 watts (W). The energy application was continuous or modulated depending on the tissue resistance. In relationship to the maximum power output, the volume of coagulation was assessed. RESULTS In continuous energy application the induced volume of coagulation was increased at lower power outputs up to 33.7 cm (3) (20 watts). Parallel to an increased volume of coagulation, the required duration of energy application was increased up to a maximum of 51.6 minutes. Modulation of the power output as a function of the tissue resistance enabled application of a wide range of power outputs (40 - 75 watts) leading to a comparable extent of coagulation with a maximum of 14.9 cm (3) (10 min.), 16.8 cm (3) (15 min.), and 19.1 cm (3) (20 min.). CONCLUSION Continuous application of RF energy leads to an inverse relationship between volume of coagulation and power output. Modulation of the power output as a function of the tissue resistance enables application of a wider range of power outputs compared to continuous application of RF energy.
Collapse
|
87
|
Hoffman K, Videan EN, Fritz J, Murphy J. Diagnosis and treatment of ocular coccidioidomycosis in a female captive chimpanzee (Pan troglodytes): a case study. Ann N Y Acad Sci 2007; 1111:404-10. [PMID: 17303834 DOI: 10.1196/annals.1406.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We report here the first documented case of ocular coccidioidomycosis in a chimpanzee (Pan troglodytes). In 1996, a 12-year-old female chimpanzee was undergoing treatment with an experimental triazole, BayR3783, for coccidioidomycosis when she was diagnosed with severe conjunctivitis in the right eye. Subsequent development of a coccidioidal granuloma of the ventral conjunctiva and anterior uvea was noted over the next several months, distorting the lens, iris, pupil, and sclera and progressing to uveitis. Treatment with BayR3783 and subconjunctival injections of triamcinolone were successful in reducing the ocular mass, but extensive damage was done to the lens and cornea. This case study provides an interesting comparison to ocular coccidioidomycosis cases observed in both humans and canines.
Collapse
|
88
|
Horger M, Fritz J, Vogel W, Denecke B, Schmit M, Vogel M, Claussen CD. Multimodale bildgebende Diagnostik von extramedullären Rezidive einer akuten myeloischen Leukämie (Chloromen) nach peripherer Stamzellen-Transplantation. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
89
|
Clasen S, Rempp H, Boss A, Schmidt D, Fritz J, Schraml C, Schick F, Claussen CD, Pereira PL. MRT-gestützte perkutane Radiofrequenz-Ablation in der Therapie des Hepatozellulären Karzinoms: Klinische Ergebnisse in der Behandlung von 24 Patienten. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
90
|
Fritz J, Clasen S, Tzaribachev N, Wiskirchen J, Claussen CD, Pereira PL. Interaktive echtzeitnahe MR-gesteuerte Steroid Infiltration der Sakroiliakalgelenke zur Therapie der refraktären Sakroiliitis bei Enthesitis-assoziierter Arthritis: Erste Resultate bei 10 Kindern. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
91
|
Horger M, Fritz J, Vogel M, Brodoefel H, Schmit M, Claussen CD. Pigmentierte villonoduläre Synovialitis (PVNS): Multimodale Bildgebende Diagnostik. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
92
|
Fritz J, Tzaribachev N, Kümmerle-Deschner J, Claussen CD, Pereira PL, Horger M. Chronische Arthritis im Kindesalter: Radiologische Charakteristika und Spektrum der Entitäten der ILAR-Klassifikation für die juvenile idiopathische Arthritis (JIA). ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
93
|
Horger M, Brodoefel H, Fritz J, Hartmann J. Hepatolienale Candidose: CT- und MR-Bildgebung. ROFO-FORTSCHR RONTG 2006; 178:1051-6. [PMID: 17128366 DOI: 10.1055/s-2006-956541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
94
|
Schewe B, Fritz J, Gaissmaier C, Weise K. [Cartilage cell transplant: surgical technique with matrix-associated chondrocytes]. Unfallchirurg 2006; 109:577-82. [PMID: 16788780 DOI: 10.1007/s00113-006-1122-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
95
|
Abstract
Full thickness defects of the articular cartilage in the knee joint have lower regenerative properties compared to chondral lesions of the ankle. In order to avoid early osteoarthritis, symptomatic articular cartilage defects in younger patients should undergo biological reconstruction as early as possible. There are different surgical procedures available to achieve a biological resurfacing of the articular joint line. Numerous animal experiments and clinical studies have shown that early biological reconstruction of circumscribed cartilage defects in the knee is superior to a conservative or delayed operative treatment. This effect refers not only to the defect healing but also to the elimination of changes following secondary osteoarthritis. The different surgical procedures can be differentiated concerning the various indications and the final outcome. Additional malalignment, meniscus tears, and/or ligament instabilities should be treated simultaneously together with the cartilage resurfacing. The mid- and long-term results of the different current techniques are promising, but further modifications and improvements are needed.
Collapse
|
96
|
Horger M, Fritz J, Wehrmann M. [MALT lymphoma of the lung: radiological diagnosis]. ROFO-FORTSCHR RONTG 2006; 178:937-41. [PMID: 17021964 DOI: 10.1055/s-2006-954789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
97
|
Clasen S, Boss A, Schmidt D, Fritz J, Schraml C, Claussen CD, Pereira PL. Magnetic resonance imaging for hepatic radiofrequency ablation. Eur J Radiol 2006; 59:140-8. [PMID: 16716553 DOI: 10.1016/j.ejrad.2006.04.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 04/05/2006] [Accepted: 04/07/2006] [Indexed: 12/27/2022]
Abstract
Image-guided radiofrequency (RF) ablation is a minimally invasive therapy option in the treatment of primary and secondary hepatic malignancies. Magnetic resonance (MR) imaging offers an accurate pre-interventional imaging having important impact on patient selection and planning of the ablation procedure. Peri-interventional imaging is used for targeting, monitoring, and controlling of the ablation procedure. Due to a high soft-tissue contrast offering delineation of tumor tissue and the surrounding anatomy, coupled with multiplanar capabilities, MR imaging is an advantageous targeting technique compared with ultrasonography (US) or computed tomography (CT). MR imaging is sensitive to thermal effects enabling a monitoring of ablation therapy subsequently being supportive to control the ablation procedure. Therefore, MR imaging can fulfil the conditions for overlapping ablations by enabling a precise repositioning of the MR compatible RF applicator if required. Thus, the probability of achieving complete coagulation in larger tumors within a single therapy session is potentially increased. A monitoring of thermal effects is moreover essential in order to prevent unintended tissue damage from critical structures in the surrounding of the target tissue. Post-interventional imaging is performed to assess treatment response after RF ablation and has prognostic impact, as an early detection of treatment failure, e.g. residual tumor tissue, enables immediate therapy. Nevertheless, differential diagnostic difficulties arise from benign periablational enhancement which may cover tumor tissue. Hence, further evaluation and improvement in the assessment of treatment response is essential.
Collapse
|
98
|
Gaissmaier C, Fritz J, Schewe B, Weise K, Mollenhauer J, Aicher W. Cartilage Defects: Epidemiology and Natural History. ACTA ACUST UNITED AC 2006. [DOI: 10.1055/s-2006-942234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
99
|
Fritz J, Horger M, Wehrmann M. Computertomographie der retroperitonealen Fibrose. ROFO-FORTSCHR RONTG 2006; 178:463-7. [PMID: 16708312 DOI: 10.1055/s-2006-941432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
100
|
Fritz J, Horger M. CT and MRI Diagnosis of Eosinophilic Fasciitis. ROFO-FORTSCHR RONTG 2006; 178:249-52. [PMID: 16508823 DOI: 10.1055/s-2006-933616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|