Stereotactic vacuum-assisted breast biopsy for suspicious microcalcifications: indications of clip deployment and reasons of clip dislocation
10.3760/cma.j.issn.1005-1201.2009.05.007
- VernacularTitle:乳腺可疑微钙化灶金属标记夹放置的筛选条件及近期移位的影响因素
- Author:
Fang LIU
;
Ping HAN
;
Sokiraaski ROMAN
- Publication Type:Journal Article
- Keywords:
Breast;
Calcinosis;
Biopsy,needle
- From:
Chinese Journal of Radiology
2009;43(5):480-485
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the indications of clip deployment and influencing factors for clip dislocation immediately after stereotactic vacuum-assisted breast biopsy. Methods One hundred and fourteen microcalcifications in 108 women aged 35 to 85 years old (median 63 years) underwent 11-gauge stereotactic vacuum-assisted breast biopsy. Every lesion was marked on biopsy site with Gel Mark Ultra clips (n = 82) or MicroMark Ⅱ clips ( n = 32) after biopsy. All microcalcifications were classified 3 mono-focal groups: < 10 mm, 10--20 mm, > 20 mm and one muhi-focal group according to its diameter and distribution. The distances between clips and biopsy sites were directly measured on post-biopsy craniocaudal and mediolateral mammograms. The distance was recorded as < 10 mm, 10--20 mm and >20 mm. Results 88% (22/25) of mono-focal microcalcifications smaller than 10 mm and 70% (14/20) of mono-focal microcalcifications measured 10--20 mm were completely removed on mammograms, whereas none of mono-focal microcalcifications larger than 20 mm (n = 17) was completely removed. 65.8% (75/114) of the clips were accurately located. Thirty-nine clips were dislocated on at least one projection with 87.2% (34/39) of the clips dislocated only along the needle track, which is called "accordion effect". Hematoma was found in 4 patients, and the clip was accurately localized only in one case with hematoma, Conclusions Clips should be deployed as a standard procedure for mono-focal microcalcifications smaller than 20 mm and all multi-focal mierocalcifications. The major reasons for clip dislocation immediately after biopsy are the accordion effect and hematoma.
