Intraoperative imaging and localization techniques for part-solid nodules

[Intraoperative near-infrared fluorescence imaging of peripheral lung tumors]

The main objective of surgical intervention in lung cancer is the radical removal of the entire tumor with the maximum possible preservation of healthy tissue. Although the area of the tumor lesion is known by the results of preoperative studies, it can be difficult to use this information to establish the exact boundaries of resection during surgery, especially with small sizes of the lump and when using minimally invasive approaches. There are several techniques to solve this problem. One of the latter is intraoperative fluorescence imaging in the infrared range, which makes it possible to detect a tumor not only with greater contrast than it can be done in white light, but also with its deep location. This review is devoted to the discussion of various aspects of this approach related to molecular imaging methods. The current situation based on the use of green indocyanine green, available for clinical use as a fluorescent agent is considered, the issues of using new targeted drugs are examined, as well as the possibility of increasing the depth of probing and combining with related treatment methods, which should contribute to a more radical operation and reduce the likelihood of local relapses.

Role of video-assisted thoracoscopic surgery in pulmonary metastasectomy

Introdcution

There are sparse prospective studies investigating the role of video-assisted thoracoscopic surgery (VATS) in management of pulmonary metastasis.

Aim

To prospectively investigate short-term surgical and pathological outcomes for PM patients operated on by VATS or open thoracotomy (OT) for management of lung secondaries.

Material and methods

Between October 2017 and December 2020, patients undergoing pulmonary metastasectomy were recruited. Patients were assigned to undergo resection with either thoracotomy (group 1) or VATS (group 2) after multidisciplinary team discussions based on the number, size and location of pulmonary metastasis and underlying lung function. All related short-term surgical and pathologic outcomes for both groups were collected for analysis.

Results

Of 58 patients enrolled, 21 were in group 1 and 37 in group 2. Colorectal cancer primary represented 40% of the cases. Patients in the VATS group were more likely to have solitary lesions that are peripherally located and removed by wedge resection, as opposed to patients in the thoracotomy group, who had more anatomical lung resections. More new nodules were likely to be detected during surgery in thoracotomy than VATS cases (p = 0. 027). However, 8 (out of 15) of the newly detected lesions were not malignant. Operative time, blood loss and hospital stay were in favor of VATS procedures.

Conclusions

In a highly selected cohort of pulmonary metastasis patients with favorable criteria (peripherally located, small, solitary/oligo-metastasis and cN0), VATS may provide acceptable onco-pathologic outcomes as compared to the standard open thoracotomy.

State of the Art in Lung Nodule Localization

Lung nodule and ground-glass opacity localization for diagnostic and therapeutic purposes is often a challenge for thoracic surgeons. While there are several adjuncts and techniques in the surgeon's armamentarium that can be helpful, accurate localization persists as a problem without a perfect solution. The last several decades have seen tremendous improvement in our ability to perform major operations with minimally invasive procedures and resulting lower morbidity. However, technological advances have not been as widely realized for lung nodule localization to complement minimally invasive surgery. This review describes the latest advances in lung nodule localization technology while also demonstrating that more efforts in this area are needed.