A Registry for People With Lung Cancer

Inclusion Criteria:

* Age ≥18 years
* Patients suitable for segmentectomy, according to the treating surgeon
* Clinical Stage I with suspected NSCLC, classified preoperatively based on the AJCC TNM staging manual, 9th edition o Note: Tissue diagnosis of NSCLC is not required before enrollment. A pathologic diagnosis of NSCLC may be confirmed preoperatively with biopsy, intraoperatively with frozen section, or postoperatively on final pathology

Exclusion Criteria:

* Actively receiving lung cancer treatment or a history of lung cancer in the previous 5 years
* History of chemotherapy or radiation therapy for a previous lung cancer
* Synchronous secondary cancer in the lung or elsewhere in the body at the time of surgery
* Carcinoid tumors
* History of other malignancies within the past 3 years, with the exception of non-melanoma skin cancer, superficial bladder cancer, and carcinoma in situ of the cervix
* Actively receiving treatment for other malignancies
* Cases of lobectomy in conjunction with segmentectomy from another lobe and ≥2 segmentectomies from different lobes either en bloc or separate will be excluded from the primary analysis.

  * Multi-segmental resection from the same lobe is not a criterion for exclusion.