Table 2.
Pathologic diagnoses in 249 suspicious breast MRI lesions
| Screening | Diagnostic | Overall | |
|---|---|---|---|
| Total Lesions (%) | 77 | 172 | |
| Malignant | 18 | 61 | 79 |
| Invasive ductal carcinoma | 11/18 (61%) | 27/61 (44%) | 38/79 (48%) |
| Ductal carcinoma in situ | 7/18 (39%) | 20/61 (33%) | 27/79 (34%) |
| Invasive lobular carcinoma | 0/18 (0%) | 3/61 (5%) | 3/79 (4%) |
| Other* | 0/18 (0%) | 11/61 (18%) | 11/79 (14%) |
| Invasive Cancer Size (mm)† | |||
| Mean (Standard Deviation) | 15 mm (13) | 15 mm (15) | 15 mm (13) |
| Benign | 59 | 111 | 170 |
| Fibrocystic changes, stromal fibrosis, or sclerosing adenosis | 18/59 (31%) | 25/111 (23%) | 43/170 (25%) |
| Fibroadenoma | 21/59 (36%) | 33/111 (30%) | 54/170 (32%) |
| Pseudoangiomatous stromal hyperplasia | 3/59 (5%) | 15/111 (14%) | 18/170 (11%) |
| Atypia including lobular neoplasia | 3/59 (5%) | 8/111 (7%) | 11/170 (6%) |
| Hamartoma | 5/59 (8%) | 9/111 (8%) | 14/170 (8%) |
| Radial scar | 3/59 (5%) | 3/111 (3%) | 6/170 (4%) |
| Papilloma | 0/59 (0%) | 3/111 (3%) | 3/170 (2%) |
| Phyllodes tumor | 0/59 (0%) | 0/111 (0%) | 0/170 (0%) |
| Post radiation changes | 2/59 (3%) | 4/111 (4%) | 6/170 (4%) |
| Other‡ | 4/59 (7%) | 11/111 (11%) | 15/170 (9%) |
*
Included phyllodes with sarcoma, lymph node with metastatic carcinoma, mixed invasive ductal and lobular carcinoma, and lesions missing data on the specific type of malignant diagnosis
†
Data only available for 75 lesions
‡
Included other benign pathology results and lesions missing data on the specific type of benign diagnosis