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.