Table 2.
Benign Pulmonary Nodule Characteristics
| Number (%) or Mean (SD) (n=65) |
|
|---|---|
| Pre-op CT performed | 65 (100%) |
| Mean nodule a size on CT (mm) | 20.8 (12.6) |
| Size distribution: | |
| <10 mm | 18 (28%) |
| 11–20 mm | 20 (31%) |
| 20–30 mm | 10 (15%) |
| >30 mm | 17 (26%) |
| CT Edge: | |
| Smooth | 27 (42%) |
| Lobulated | 14 (22%) |
| Spiculated | 22 (34%) |
| Not described | 2 |
| CT Consistency: | |
| Cavitary | 7 (11%) |
| Semi-solid | 3 (5%) |
| Solid | 53 (82%) |
| Ground glass | 1 (1.5%) |
| Not Described | 1 |
| Nodule growth reported by CT | 22 (34%) |
| CT Location: | |
| Left upper lobe | 16 (25%) |
| Left lower lobe | 6 (9%) |
| Right upper lobe | 19 (29%) |
| Right middle lobe | 8 (12%) |
| Right lower lobe | 6 (9%) |
| Not reported | 10 (15%) |
| Pre-op FDG-PET performed | 42 (65%) |
| FDG-PET Avid b | 26/42 (62%) |
| Pre-op FNA Biopsy performed | 15 (23%) |
CT = computed tomography; FDG-PET = fluorodeoxyglucose-positron emission tomography; FNA = fine needle aspiration; SD = standard deviation; SUV = standardized uptake value
a
The majority of lesions were ≤3cm; there were 17 ‘masses’ (>3cm). The term nodule is used throughout the manuscript for consistency acknowledging that a small percentage were actually masses.
b
FDG-PET Avid defined as SUV > 2.5 or mild, moderate, or intense uptake, or radiology report indicated suspicion of cancer.