A short overview is given demonstrating the possibilities and limits of the
frozen section technique in mammary carcinoma. The accuracy of this method
in diagnostic pathology of the mammary gland is up to 97 % when applied by
experienced pathologists. In case of breast cancer it may be difficult to
determine the maximum of tumor size and the minimum tumor-free distance to
the resection margin which are significant for a breast-conserving operatio
n. There are further limits when an atypical ductal hyperplasia (ADH) shoul
d be differentiated from a ductal carcinoma in situ (DCIS) and when in case
of DCIS microinvasion is to be proven. Nevertheless, intraoperative frozen
section technique is unrenunciable for breast cancer surgery. Mistakes can
be avoided in most of the cases, if surgeon and pathologist will closely c
ooperate and if both are fully aware of the limitations of the method.