How would you approach the adjuvant management of thoracic SMARCA4-deficient undifferentiated tumor of the lung following lobectomy?

We know these tumors behave aggressively, but don't have a good handle on chemo-sensitivity. Some morphologically look like a sarcoma, and some others, carcinomas. Given the lack of clarity, if completely resected with negative margins, reasonable to watch closely and treat with measurable/evaluable...