Table 2.

Summary of types of biopsies performed on the adult population, the average tumor content as estimated by a pathologist, and the frequency with which each technique yielded tumor content more than the 55% threshold we required to proceed with sequencing

Type of biopsy	N = 100	Average tumor content (estimated by pathologist) (%)	Frequency in which the sample had tumor content >55% (%)
Ultrasound guided core	54	64	76
CT-guided core	7	57	57
Surgery	9	69	78
Excisional or incisional	16	70	88
Bite or punch biopsy	4	70	100
Bronchoscopic/endoscopic core biopsy	3	67	100
Endoscopy or broncoscopy or EBUS	4	44	25
Blood draw	1	N/A	100
Thoracentesis	2	50	48

N/A, not applicable; CT, computed tomography; EBUS, endobrachial ultrasound.