Table 1.
Study population characteristics
| Parameter | DBT Only group | DM Only group |
|---|---|---|
| Mean age (range) (years) | 63 (43–80) | 62 (50–70) |
| Mean tumour size (range) (mm) | 19 (7–90) | 27 (9–90) |
| Lesion type, n (%) | ||
| Invasive ductal carcinoma | 8 (42) | 2 (29) |
| Invasive lobular carcinoma | 9 (47) | 3 (43) |
| Invasive tubular carcinoma | 1 (5) | 1 (14) |
| Ductal carcinoma in situ | 0 | 1 (14) |
| Others | 1 (5)a | 0 |
| Total | 19 (100) | 7 (100) |
| Histological grade of invasive cancers, n (%) | ||
| Grade 1 | 7 (39)b | 4 (67) |
| Grade 2 | 7 (39) | 2 (33) |
| Grade 3 | 4 (22) | 0 |
| Total | 18 (100) | 6 (100) |
DBT, digital breast tomosynthesis; DM, digital mammography.
a
Intracystic papillary cancer.
b
Of the patients with histological grade 1 cancers, four were symptomatic and three asymptomatic.