Table 1.
Definitions used for interpretation of 99mtechnetium dimercaptosuccinic acid renal scan
| DMSA Interpretation | Definition |
|---|---|
| Cortical defecta | Focal or diffuse decreased uptake with or without volume loss |
| Acute pyelonephritisa | Cortical defect with preserved contour |
| Renal scarringa | Decreased uptake of tracer associated with loss of contours or cortical thinning |
| Severity (grade) of scarringa | A: none; B: mild; C: moderate; D: severe; and E: global atrophy |
| Kidney segmentsa | Each kidney was divided into 12 segments (Supplemental Figure 1) |
| New scarring | Presence of scarring in kidney segments that were previously normal or showed APN |
| Any scarring | (1) New scarring or (2) presence of scarring at follow-up in patients who had no baseline renal scan or (3) those with renal scarring on both baseline and any follow-up scan |
| Renal scarring gradea | Grade 0: no scarring Grade 1: 1–2 kidney segments affected Grade 2: 3–4 kidney segments affected Grade 3: >4 kidney segments affected Grade 4: Global atrophy characterized by diffusely scarred and shrunken kidney |