A method for control of the target at aspiration biopsy of non-palpable breast lesions.

A method for two-dimensional localization of non-palpable lesions in the breast has been evolved. Even if the depth of a lesion is unknown a good idea of it can be gained from a craniocaudal and a lateral projection. For biopsy, a light intersection guides the biopsy needle during its insertion. Deviation of the needle due to the bevelled surface of the needle tip can be avoided by rotation of the needle. Immediately following the aspiration biopsy, a small amount of contrast medium is injected through the biopsy needle. Marking the depth by means of a contrast medium makes it possible to control the biopsy site in all three dimensions. The flattening and spreading of the breast tissues occurring during compression of the breast may influence the position of a lesion. The flattening can be demonstrated in a cyst. The present report refers to a series of 108 consecutive aspiration biopsies. Diagnostic material was obtained in 92.6 per cent of the cases.