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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 23 (1984), S. 1051-1056 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 102 (1980), S. 5979-5981 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 54 (1989), S. 2331-2335 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 46 (1981), S. 1977-1984 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Environmental biology of fishes 39 (1994), S. 339-355 
    ISSN: 1573-5133
    Keywords: Anguilla ; Caribbean Sea ; Florida Current ; Fronts ; Gulf of Mexico ; Migration ; North Atlantic Ocean ; Subtropical Convergence Zone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Distribution of leptocephali ofConger in the Western North Atlantic Ocean was studied using specimens from our collections, specimens from other collections, and various existing collection records. The presence of leptocephali ofConger oceanicus andConger triporiceps 〈 30 mm long over deep water in the southwestern Sargasso Sea in autumn and winter implies a protracted spawning period there. The subtropical convergence zone, meandering east-west across the Sargasso Sea, is probably the northern limit of spawning of both species. Spawning may also occur close to the Bahamas and Antilles.C. triporiceps may spawn also in the Caribbean Sea judging by the capture of small leptocephali in the western Caribbean and of the more southerly continental distribution of its juveniles. The claim of Johannes Schmidt in 1931 that the EuropeanC. conger spawns across the North Atlantic into the western Sargasso Sea is probably incorrect, because leptocephali ofConger are rare in the eastern Sargasso Sea and becauseC. triporiceps, with myomere numbers overlapping those ofC. conger, was recently described in the western North Atlantic. With increasing size, leptocephali ofC. oceanicus and a portion ofC. triporiceps spread westward and northward in the Florida Current and Gulf Stream, but larger leptocephali especially ofC. triporiceps are found also in the Caribbean and Gulf of Mexico. Spawning ofC. oceanicus in the Sargasso Sea indicates that adults cross the Florida Current-Gulf Stream, and successful leptocephali cross the current in the opposite direction to colonize juvenile habitat on the continental shelf, a migratory pattern similar to that of the American eelAnguilla rostrata (Anguillidae).
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1534-4681
    Keywords: Soft tissue sarcoma ; Limb salvage ; Free-tissue transfer ; Reconstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Free tissue transfer (FTT) can extend the limits of limb salvage in patients with soft tissue sarcoma (STS), but few data exist on the efficacy and morbidity in this patient population. Methods: We prospectively examined 19 patients who underwent resection of STS and an immediate or a delayed FTT reconstruction between November 1989 and May 1992. Results: There were 11 immediate and eight delayed FTT reconstructions (mean age 52 years). All delayed patients presented with complications resulting from previous STS treatment. Defects involved the leg (n=7), knee (n=2), and thigh (n=10) and had a mean size of 129 cm2, 154 cm2, and 283 cm2, respectively. Preoperative radiatiotherapy had been administered to 74% of patients in the series (mean dose 53 Gy). FTT success rate was 95% (one failure in the delayed group). Limb salvage and postreconstruction ambulatory rates were both 95%. The overall complication rate was 47%, with the trend of a higher rate (63%) in the delayed group compared with the immediate group (36%). The immediate reconstruction group required no additional operative procedures before FTT and had a shorter hospital stay (13 days) compared with that of the delayed reconstruction group (40.6 days). Mean follow-up was 11.9 months (range 2–30). Conclusions: FTT is a reliable and versatile adjunctive treatment for lower extremity salvage of patients with STS. Immediate reconstruction appears to carry a lower complication rate and a faster rehabilitation for the patient.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1534-4681
    Keywords: Soft-tissue sarcoma ; Radiotherapy ; Cost analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: We compared treatment-related charges associated with external beam irradiation and interstitial implantation for soft-tissue sarcoma of the extremity. Methods: Charges related to radiotherapy in 35 patients with soft-tissue sarcoma of the extremity were reviewed. Preoperative external beam irradiation (EB) delivering 50 Gy in 25 fractions with 6 MV photons was administered to 12 of the patients evaluated. The remaining 23 patients were treated with interstitial implantation (IR) as the only radiotherapeutic intervention. The anatomic distribution of the sarcomas treated by IR included 14 lower-extremity (LE) and nine upper-extremity (UE) lesions. The average length of iridium wire used for IR was 78 cm. Because LE lesions tend to be larger, the average length equaled 109.5 cm as compared with the 47 cm for UE implants. Results: The radiotherapeutic approach represented the only difference in treatment-related charges because the operative procedure of wide local excision was performed in each group. No difference in perioperative complications was observed between the two treatment approaches. Charges were stratified according to hospital-based and professional services. Radiotherapy-based hospital charges for the administration of EB averaged $6,515 compared with $4,050 for IR (p〈0.0001). Professional services also were significantly different, totaling $4,390 for EB and $3,240 for IR (p〈0.0001). The total of these charges for radiotherapy procedures and professional fees equaled $10,905 for EB compared with $7,290 for IR (p〈0.0001). Incorporating the necessary operating-room time for implant placement ($750) and five additional hospital days ($1,800), the costs associated with IR totaled $9,840; using chisquare analysis, the cost for IR remained significantly (p〈0.0001) less expensive than the $10,905 associated with EB. Because a large component of the radiotherapy cost for IR is related to the length of iridium 192 wire required, charges were stratified according to the location of the tumor. The total charge for IR of the UE equaled $9,345 compared with $10,335 for LE implants. Chi-square comparison for both UE and LE implants continued to show significant differences (p〈0.0001) when related to EB therapy. Conclusion: Cost-analysis comparison of brachytherapy versus external beam irradiation found lower charges for patients undergoing adjuvant irradiation with brachytherapy for soft-tissue sarcoma. To optimize the cost-benefit ratio, prospective studies are necessary to define the application of these radiotherapeutic approaches based on clinical criteria.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Annals of surgical oncology 2 (1995), S. 145-150 
    ISSN: 1534-4681
    Keywords: Microvascular craniofacial reconstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Resections of large malignancies involving the middle and upper thirds of the face and cranium result in complex defects, posing a difficult challenge for the reconstructive surgeon. Free tissue transfer may be the best means of reconstruction. Methods: We reviewed 54 consecutive microvascular craniofacial reconstructions after tumor ablation performed at the University of Texas M.D. Anderson Cancer Center from May 1988 to September 1992. Information regarding patient characteristics, tumor stage and histology, history of prior therapy, the defect after tumor ablation, and the details of the reconstruction were entered in a microcomputer database at the time of the initial surgery. Free flap outcome, the number and type of complications, control of malignant disease, and the use of adjuvant therapy were recorded prospectively. Results: Patients had defects of the scalp and cranium (15 of 50) or of the maxilla/orbit/cranial base (35 of 50) after resections for a variety of tumors. Immediate reconstruction was completed in 40 patients and delayed in 10. Prior therapy included surgery (39 of 50) and/or radiotherapy (35 of 50). The free flap success rate was 96% (52 of 54). In patients with successful flaps, significant wound complications occurred in 13.5% of patients (seven of 52) and donor site problems in 11.1% (six of 54) for an overall complication rate of 24.1% (13 of 54). There were no operative deaths or neurologic complications. The timing of surgery or a history of prior surgical therapy or radiotherapy did not significantly influence the complication rates. Conclusion: Free tissue transfers provide optimal restoration of large craniofacial defects resulting from cancer resection.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1534-4681
    Keywords: Reconstruction ; Elective mastectomy ; Breast ; Contralateral mastectomy ; Immediate breast reconstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Women with breast cancer treated by mastectomy with immediate breast reconstruction can get exceptionally good results if the reconstruction is performed with autogenous tissue using the transverse rectus abdominis myocutaneous (TRAM) flap. Bilateral reconstruction with TRAM flaps is also possible, but only if both breasts are reconstructed at the same time. To avoid the possibility of subsequently developing contralateral malignancy and having to undergo assymetrical reconstruction with a different technique, some patients have chosen the alternative of bilateral mastectomy with bilateral immediate reconstruction. This is only reasonable if the incidence of failure in bilateral breast reconstruction is very low. Methods: We prospectively studied reconstructive outcomes in 100 patients who had breast cancer and who underwent bilateral mastectomy and reconstruction (using implants as well as TRAM flaps). We also reviewed the histologic findings in 88 prophylactically removed high-risk breasts. Results: Successful outcomes were initially achieved in 95 patients; of the 5 failures, two were successfully reconstructed with alternative techniques for an overall success rate of 97%. Of the 63 patients reconstructed with bilateral TRAM flaps, all but one (98%) were successful on the first try. TRAM flap reconstructions were significantly more likely to be successful than were those based on implants (p=0.05). Previously unsuspected invasive cancer was found in 3 patients (3.4%), whereas carcinoma in situ was found in 5 patients (5.7%) and in another 18 patients (20%) cellular atypia was present. Conclusions: Bilateral breast reconstruction has a low incidence of failure, particularly if TRAM flaps are used. For selected patients, elective contralateral mastectomy with immediate bilateral reconstruction is a reasonable treatment alternative provided that the necessary expertise is available and the patients clearly understand the risks.
    Type of Medium: Electronic Resource
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