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  • 1
    Electronic Resource
    Electronic Resource
    Three-dimensional endorectal ultrasonography for staging of obstructing rectal cancer (1996)
    Springer
    Diseases of the colon & rectum 39 (1996), S. 636-642 
    Details
    ISSN: 1530-0358
    Keywords: Three-dimensional imaging ; Endorectal ultrasonography ; Rectal cancer ; Stenosis ; Preoperative staging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Preoperative staging of advanced carcinoma of the rectum by conventional endorectal ultrasonography is often impossible because of the presence of obstruction, which does not allow passage of the endoprobe. In a prospective Study, we investigated the value of three-dimensional endorectal ultrasonography for staging of obstructing rectal cancer. This technique permits examination of obstructing rectal tumors because scan planes can be chosen deliberately within a scanned volume. METHODS: Overall obstructing tumors not accessible for conventional endoprobes were found in 26 of 94 patients who were subjected to endorectal ultrasonography for staging of rectal cancer. Three-dimensional volume scanning was performed using a three-dimensional frontfire transducer or a three-dimensional bifocal multiplane transducer (7.5/10 MHz). Data of the three-dimensional scans were stored on a hard disk for subsequent evaluation with a combison 530 processor. RESULTS: Three-dimensional transrectal endosonography enabled visualization of local tumor spread in all 26 patients. In 18 patients, obstruction was caused by advanced primary rectal carcinoma. Endosonography accurately determined the tumor infiltration depth in three T2 tumors, eight T3 tumors, and three T4 tumors. Overall accuracy for assessment of infiltration depth was 78 percent. Accuracy for assessment of perirectal lymph node involvement was 75 percent. In eight patients, the obstruction was attributable to extramural regrowth of rectal cancer after surgery. Diameter of the lesions ranged between 3 and 6 cm. Although all lesions were clearly depicted by three-dimensional endosonography, only five lesions (62 percent) were detected by computed tomography. CONCLUSIONS: Three-dimensional endorectal ultrasonography provides previously unattainable scan planes and enables accurate staging of obstructing rectal tumors. This technique may improve therapy planning in advanced rectal cancer by selecting patients who require preoperative adjuvant therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02056942
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Video-assisted thoracic surgery (1998)
    Springer
    Surgical endoscopy and other interventional techniques 12 (1998), S. 133-136 
    Details
    ISSN: 1432-2218
    Keywords: Key words: VATS — Staging of extrathoracic tumors — Peripheral pulmonary lesions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: This prospective study was conducted to investigate the value of video-assisted thoracic surgery (VATS) for staging and therapy of thoracic tumors. Methods: VATS was performed in 86 patients presenting peripheral pulmonary nodules. Indications for thoracoscopy included diagnosis of indeterminated pulmonary lesions (n= 55), staging of disseminated disease (n= 24), and therapeutic interventions (n= 7). Previous or simultaneous tumors belonged to gastrointestinal tract (n= 27), sarcoma (n= 19), breast (n= 12), and miscellaneous. VATS was carried out under general anesthesia using double lumen intubation. Results: VATS was successfully performed in 78% of patients. It was converted in 19 patients (22%) because of adhesions (n= 12), technical problems (n= 3), and lesions not to be found (n= 4). VATS revealed malignancy in 81% and benign lesions in 19%. Additional information compared to conventional staging was obtained in 48%, resulting in therapeutic consequences in 34% of the patients. Postoperative complications related to VATS were observed in nine patients. Conclusions: In this study, VATS proved to be a sensitive technique for staging of pulmonary lesions. Thoracoscopic wedge resection may have significant impact on the operative management of carefully selected patients with peripheral pulmonary lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649900613
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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