Ultrasound-guided diagnostic breast biopsy methodology: retrospective comparison of the 8-gauge vacuum-assisted biopsy approach versus the spring-loaded 14-gauge core biopsy approach

Table 9 Final histopathologic diagnosis, including all instances in which subsequent diagnostic removal of tissue from the same anatomical site of the affected breast was performed in an immediate fashion or in a delayed fashion.

	8-gauge	14-gauge	All cases
Total number of cases	724	719	1443
Carcinomas^#	148 (20.4%)	386 (53.7%)	534 (37.0%)
High risk breast lesions^#	15 (2.1%)	5 (0.7%)	20 (1.4%)
Fibroadenomas	238 (32.9%)	151 (21.0%)	389 (27.0%)
Benign breast changes/conditions^†	261 (36.0%)	138 (19.2%)	399 (27.7%)
Intraductal papillomas	42 (5.8%)	6 (0.8%)	48 (3.3%)
Indeterminate fibroepithelial breast lesions	0 (0%)	0 (0%)	0 (0%)
Benign phyllodes tumors	2 (0.3%)	4 (0.6%)	6 (0.4%)
Malignant phyllodes tumors	0 (0%)	1 (0.1%)	1 (0.1%)
Lymphomas/leukemias	4 (0.6%)	7 (1.0%)	11 (0.8%)
Benign lymphoid tissue	13 (1.8%)	20 (2.8%)	33 (2.3%)
Desmoids/fibromatosis	1 (0.1%)	1 (0.1%)	2 (0.1%)

# carcinomas included invasive carcinoma and ductal carcinoma in situ.
* high risk breast lesions included atypical ductal hyperplasia, atypical lobular hyperplasia, and lobular carcinoma in situ.
† benign breast changes/conditions included all of the following histopathologic terminologies issued in official pathology report from Department of Surgical Pathology: fibrocystic breast changes, ductal epithelial hyperplasia, sclerosing adenosis, stromal fibrosis, cyst-formation, ductal ectasia, fibrous mastopathy, lymphocytic mastopathy, diabetic mastopathy, columnar cell changes, fat necrosis, hemorrhage, scar-formation, gynecomastia, adenosis tumor, lactating adenoma, hamartoma, lipoma, myofibroblastoma, amyloidosis, benign granular cell tumor, epidermal inclusion cyst, or benign breast tissue with no pathologic changes.

ISSN: 1477-7819