Table 1.
Round 1 summary of Delphi results
| Core | Optional | Exclude | |
|---|---|---|---|
| “Essential” characteristics according to [9] | |||
| Mass size | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Whether the mass is cystic or solid | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Presence or absence of macroscopic fat | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Presence or absence of enhancement | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Bosniak classification for cystic masses | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Size comparisons for solid and Bosniak IIF–IV masses | 88% (14/16) | 13% (2/16) | 0% (0/16) |
| Axial location of the mass (e.g., anterior) | 88% (14/16) | 13% (2/16) | 0% (0/16) |
| Staging information for solid and Bosniak III–IV masses | 75% (12/16) | 25% (4/16) | 0% (0/16) |
| “Preferred” characteristics according to [9] | |||
| Whether a solid mass has regions of necrosis | 44% (7/16) | 50% (8/16) | 6% (1/16) |
| Mass margins (e.g., infiltrative, circumscribed) | 75% (12/16) | 25% (4/16) | 0% (0/16) |
| Description of each individual Bosniak feature | 25% (4/16) | 63% (10/16) | 13% (2/16) |
| Capsular location of the mass (e.g., > 50% exophytic, endophytic) | 63% (10/16) | 38% (6/16) | 0% (0/16) |
| Presence of bland thrombus peripheral to tumor thrombus | 81% (13/16) | 13% (2/16) | 6% (1/16) |
| Findings that may predict aggressiveness (e.g., T2w hypointensity) | 19% (3/16) | 87% (13/16) | 0% (0/16) |
| Specific RCC subtype if feasible (e.g., clear cell RCC) | 25% (4/16) | 75% (12/16) | 0% (0/16) |
| Specifying optimal follow-up imaging type | 25% (4/16) | 69% (11/16) | 6% (1/16) |
| Specifying whether a portion or all of a mass enhances | 31% (5/16) | 63% (10/16) | 6% (1/16) |
| Distance of the mass to the sinus fat or collecting system | 75% (12/16) | 25% (4/16) | 0% (0/16) |
Inputs represent characteristics considered “essential” or “preferred” in prior work [9]. Threshold for inclusion in the template was ≥ 80% support by the blinded respondents. If less than 80% considered the characteristic a core feature but the sum of support for core + optional was ≥ 80%, it was considered an optional feature. If neither was the case, the characteristic was excluded from consideration. Italic values indicate concordance and bold values indicate discordance between the Delphi process and data in [9]