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N. Kajiwara



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    O28 - Endoscopy (ID 124)

    • Event: WCLC 2013
    • Type: Oral Abstract Session
    • Track: Pulmonology + Endoscopy/Pulmonary
    • Presentations: 1
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      O28.06 - Comprehensive management of central type early lung cancer (ID 1558)

      11:25 - 11:35  |  Author(s): N. Kajiwara

      • Abstract
      • Presentation
      • Slides

      Background
      Tumor localization and the precise evaluation of tumor invasion are most important for the management of central type early stage lung cancer (CELC) and Photodynamic therapy (PDT) has come to be considered as the first choice of treatment for CELC. The present guidelines of PDT for CELC were established based mainly on the data obtained from studies since 1980’s. CELCs less than 1 cm in diameter showed a favorable cure rate by PDT, thus this was a good standard to decide the indications of PDT. To obtain complete response (CR) by PDT, evaluation of each lesion is extremely important, including the extent of the tumor on the bronchial surface and the depth of invasion in the bronchial wall. We postulate that the combination of comprehensive diagnosis and the new generation of photosensitizers may increase the CR rate and expand the indications of PDT for larger tumors.

      Methods
      Autofluorescence bronchoscopy (AFB) has been used in the objective evaluation of the margin of the tumor before endoscopic treatment and Endobronchial ultrasonography (EBUS) has been employed to determine the depth of tumor invasion. Ooptical coherence tomography (OCT) has been investigated for clinical use as well. Also, the relatively newer photosensitizer NPe6, which has a stronger antitumor effect than Photofrin has been extensively used for PDT. We routinely used these diagnostic methodologies and NPe6 since 2004.

      Results
      A total of 122 consecutive CELCs were treated by PDT using NPe6 in Tokyo Medical University and CR was obtained in 115 lesions (CR rate 94.3%). Of the 122 lesions examined in this study, 78 had a diameter of ≦1.0 cm and the rest of the 44 cancer lesions were >1.0 cm in size. The CR rate of CELC ≦1.0 cm in diameter was 93.6% (73/78) and for those >1.0 cm in diameter, 95.5% (42/44), respectively. There was no significant difference between tumor size and clinical response. The CR rate to NPe6-PDT is higher than that of Photofrin-PDT in our previous studies. This early result suggests that PDT with NPe6 has a stronger antitumor effect than Photofrin therefore similar treatment outcome even for larger tumors >1.0 cm in diameter should be possible.

      Conclusion
      Objective evaluation by a comprehensive approach using AFB and EBUS enables to select the optimal therapeutic strategy for CELC. These results suggest that PDT with NPe6 may have a similar treatment outcome regardless of tumor size, as long sufficient laser illumination of the entire tumor is possible.

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    P1.07 - Poster Session 1 - Surgery (ID 184)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Surgery
    • Presentations: 1
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      P1.07-009 - Preoperative simulation and navigation using the combination of high-speed 3D-image analysis system and Robotic surgery increase the efficacy and accuracy in thoracic surgery (ID 980)

      09:30 - 09:30  |  Author(s): N. Kajiwara

      • Abstract

      Background
      Previously, we reported the utility of the da Vinci[®] Surgical System (dVS: Intuitive Surgical, Inc., Sunnyvale, CA) for various types of anterior and middle mediastinal tumors in clinical practice. We evaluated the feasibility, safety and appropriate settings of this system for the surgical treatment of these tumors. One review reports about the importance of the appropriate settings according to tumor location in robot-assisted thoracic surgery (RATS), because no target always exists in the same location within the thoracic cavity. In this report, we evaluated the efficacy of a high-speed three-dimensional (3D) image analysis system (SYNAPSE VINCENT; Fuji Photo Film Co., Ltd.) for preoperative simulation and navigation during a RATS procedure.

      Methods
      In this study, a high-speed 3D-image analysis system was used to decide the best positioning of robotic-arms and instruments preoperatively. Moreover, this system has capable of detecting the tumor location and extracting surrounding tissues quickly, accurately and safely. Accurate and speedy set-up of the da Vinci S[® ]Surgical System was possible for this operation. Synapse Vincent facilitated determining the best positioning of robot arms and instruments, and was an excellent device for navigation in real time. All patients who underwent RATS in our institution provided written informed consent to receive robotic surgery using the dVS, and the institutional review committees of each institution gave their permission. In this report, a representative mediastinal tumor which was located in the upper thoracic cavity was selected to establish the merits of this procedure.

      Results
      The patient, a 38-year-old woman, had a posterior mediastinal tumor located at the upper level of Th 1 to 3. Accurate and speedy set-up of the dVS was capable on this operation. It was feasible to decide the best positioning of robot-arms and instruments, and excellent device for the navigation on real time. The total operation time was 270 minutes, the time of the dVS setting was 21 minutes, and the console time (the dVS working time) was 132 minutes. The amount of bleeding was 167 mL and the drainage time was 2 days after the operation and this patient had no complications. The pathological report revealed a schwannoma (85 × 42 × 20 mm) with no malignancy.

      Conclusion
      For the optimal performance of RATS, the positioning of all units and the locations of instrument ports need suitable directional setting. Preoperative simulation and navigation during of operation using SYNAPSE VINCENT for the RATS has efficacy for planning the setting, especially in deciding the points of instrument ports and the angle of robot arms, and very useful as a device of the navigation software and education use operating on it.