Table 4.
Characteristics and symptoms associated with benign renal masses
| Characteristic | All (n=54) | Oncocytoma (n=29) | AML (n=8) | Other* (n=17) |
| Age (years) | 65 (32–86) | 66 (42–86) | 63 (59–68) | 61 (32–78) |
| Gender | ||||
| Female | 29 (53.7) | 12 (41.4) | 5 (62.5) | 12 (70.6) |
| Male | 25 (46.3) | 17 (58.6) | 3 (37.5) | 5 (29.4) |
| BMI | 27.6 (18.7–45.8) | 27.8 (19.4–39.6) | 28 (22–38.8) | 26.4 (18.7–45.8) |
| CT size (cm) | ||||
| ≤4 | 22 (44.9) | 14 (50) | 3 (50) | 5 (33.3) |
| 4< to ≤7 | 18 (36.7) | 11 (39.3) | 2 (33.3) | 5 (33.3) |
| 7< to ≤10 | 6 (12.2) | 1 (3.6) | 1 (16.7) | 4 (26.7) |
| >10 | 3 (6.1) | 2 (7.1) | 0 (0) | 1 (6.7) |
| NA | 5 (-) | 1 (-) | 2 (-) | 2 (-) |
| RCC-type symptoms | ||||
| No | 19 (35.2) | 10 (34.5) | 4 (50) | 5 (29.4) |
| Yes | 35 (64.8) | 19 (65.5) | 4 (50) | 12 (70.6) |
| Local symptoms | ||||
| No | 6 (17.1) | 3 (15.8) | 1 (25) | 2 (16.7) |
| Yes | 29 (82.9) | 16 (84.2) | 3 (75) | 10 (83.3) |
| Systemic symptoms | ||||
| No | 20 (57.1) | 12 (63.2) | 1 (25) | 7 (58.3) |
| Yes | 15 (42.9) | 7 (36.8) | 3 (75) | 5 (41.7) |
| Incidental diagnosis | ||||
| No | 23 (42.5) | 13 (44.8) | 2 (25) | 8 (47) |
| Yes | 29 (54) | 15 (51.7) | 6 (75) | 8 (47) |
| Not known | 2 (3.5) | 1 (3.5) | 0 (0) | 1 (6) |
*Consists of cystic nephroma (4), benign cyst (3), metanephric adenoma (2), mixed epithelial stromal tumour (2), haemangioblastoma (1), leiomyomata (1), multilocular cyst (1), myxoid mesenchymal tumour (1), Rosai Dorfman disease (1), and solitary fibrous tumour (1).
AML, angiomyolipoma; BMI, body mass index; RCC, renal cell carcinoma.