Table 3.
Round 2 summary of Delphi results
| Core | Optional | Exclude | |
|---|---|---|---|
| Characteristics established in Round 1 | |||
| 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) |
| Whether a solid mass has regions of necrosis | 44% (7/16) | 50% (8/16) | 6% (1/16) |
| Description of each individual Bosniak feature | 25% (4/16) | 63% (10/16) | 13% (2/16) |
| Findings that predict aggressiveness (e.g., T2w hypointensity) | 19% (3/16) | 81% (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) |
| Characteristics re-assessed in Round 2 | |||
| Size comparisons for solid and Bosniak IIF-IV masses | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Axial location of the mass (e.g., anterior) | 81% (13/16) | 19% (3/16) | 0% (0/16) |
| Staging information for solid and Bosniak III-IV masses | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Mass margins (e.g., infiltrative, circumscribed) | 88% (14/16) | 12% (2/16) | 0% (0/16) |
| Capsular location of the mass (e.g., > 50% exophytic, endophytic) | 81% (13/16) | 19% (3/16) | 0% (0/16) |
| Presence of bland thrombus peripheral to tumor thrombus | 88% (14/16) | 6% (1/16) | 6% (1/16) |
| Distance of the mass to the sinus fat or collecting system | 88% (14/16) | 12% (2/16) | 0% (0/16) |
| Characteristics added in Round 2 via Round 1 free-text suggestions | |||
| Length of tumor thrombus | 31% (5/16) | 63% (10/16) | 6% (1/16) |
| Whether tumor thrombus invades the wall of the IVC | 31% (5/16) | 63% (10/16) | 6% (1/16) |
| Craniocaudal location of the mass (e.g., upper pole) | 100% (16/16) | 0% (0/16) | 0% (0/16) |
| Presence or absence of microscopic fat (MRI only) | 50% (8/16) | 50% (8/16) | 0% (0/16) |
| Presence or absence of ipsilateral vascular anomalies | 50% (8/16) | 44% (7/16) | 6% (1/16) |
Inputs represent characteristics considered “essential” or “preferred” in prior work [9] as well as characteristics introduced during Round 1 free comments. Threshold for inclusion was ≥ 80% support by the blinded respondents. Italic values indicate concordance and bold values indicate discordance between the Delphi process and data in [9]. Bold italic values indicates the item was not studied in [9]