Mammary epidermoid inclusion cysts after wide-core needle biopsies.
OBJECTIVE
To investigate the prevalence of squamous epidermoid inclusion cysts after wide-core needle biopsy.


RESULTS
Epidermoid inclusion cysts were found in five of 17 surgical excisions (29%) after preliminary wide-core needle biopsies in a 7-month period. Thereafter they were not seen in 26 subsequent postwide-core surgical excisions in a period of 6 months.


CONCLUSIONS
The cysts appear to be an iatrogenic complication of wide-core biopsy, and need morphological recognition in order to avoid confusion with spontaneous squamous metaplasia of benign or malignant breast epithelium. Longer term implications are unknown.
Davies
J D
JD
Regional Breast Pathology Unit, University of Bristol, Southmead Hospital, UK.
Nonni
A
A
D'Costa
H F
HF
D001707:Biopsy, Needle / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods; D001941:Breast Diseases / Q000209:etiology* / Q000473:pathology*; D004814:Epidermal Cyst / Q000209:etiology* / Q000473:pathology*; D005260:Female; D006801:Humans