This is a clinical trial to evaluate the use of peritumoral injection of near-infrared dye indocyanine green to identify lung lesions and sentinel lymph nodes. The primary purpose is to determine if the use of ICG injected via navigational bronchoscopy, CT-guided or transthoracic allows us to identify the first lymph node that drains from the tumor, and thus would be the most likely site for metastatic disease, and remove it for analysis to improve the ability to detect tumor in this node and to remove this additional site that potentially contains tumor cells. Using this intraoperative imaging technique, we aim to improve the identification of lung nodules for resection and the intraoperative identification of sentinel lymph nodes in the event that a lymphadenectomy is performed.

Patients enrolled in the study will undergo peritumoral injection of near-infrared dye indocyanine green around the lung lesion or within the adjacent segmental bronchus at the time of surgery. ICG injection will be carried out via navigational bronchoscopy, CT-guided or trans-thoracic ICG injection (dependent on lesion location) and ICG imaging of the sentinel lymph nodes will be undertaken using an NIR-enabled camera.

• This study is designed primarily to determine the safety and feasibility of intra-operative localization of thoracic lesions following ICG injection, and second, to include an assessment of the predictive value of sentinel lymph nodes relative to the disease status of the greater lymphadenectomy specimen as well as disease recurrence rates.
• We are using a dose approximately 100 times lower than previously approved for injection in the blood. After a few minutes, the surgeon will look at these lymph nodes with near-infrared fluorescence and then remove any fluorescent and non-fluorescent lymph nodes near the tumor, as is standard for lung surgery.
• The "filtered" near-infrared light causes the indocyanine green dye to fluoresce so that the surgeon can identify the lymph nodes most likely to contain tumor cells. If the lymph node is not found in the group of nodes usually removed, we will use the near-infrared light to look near the tumor for the sentinel lymph nodes and guide the surgeon so that the sentinel nodes can be removed and studied. The surgeon will then continue with the operation and remove the tumor. The lymph nodes are processed for special analysis tailored to finding metastasis in sentinel lymph nodes.
• As is standard of care, patients will be monitored for evidence of recurrence by their surgeon. Recurrences will be recorded.

Inclusion Criteria:

• Patients that have agreed to undergo video assisted thoracoscopic surgery or thoracotomy for surgical resection as recommended by their thoracic surgeon.
• 18 years of age or older
• Documented, signed, dated informed consent obtained prior to any study specific procedures being performed

Exclusion Criteria:

• Pregnant women are excluded and women of childbearing potential without a negative pregnancy test prior to study procedures. All patients with Iodine allergies will be excluded.

There is no plan to make IPD available to other researchers at this time.