Does R status take into account the primary disease only or disease in the lymph node also, i.e. if nodes are left behind after complete resection of the primary do we call it R0?
The R0 status concerns the entire body; if a clinically positive lymph node is left behind it is R2. If there are liver metastases it is R2. If a solitary liver metastasis is resected and no other tumour is evident, it is R0. 1.5 R Classification and Tis Lumpectomy specimen of a breast tumour contains a 1.1-cm carcinoma with no invasive carcinoma at the resection lines; however, intraductal carcinoma was at the lateral resection line. How is this classified with respect to T category and R classification? The invasive carcinoma would be pT1 and R0. Although the in situ component is not considered in the R classification, an optional solution would be R1(is). 1.6 Positive Cytology If peritoneal washing cytology, taken before any other procedure during laparotomy is positive, how do I stage the patient? Grossly visible peritoneal metastasis were not found. Is it considered a form of peritoneal metastasis and thus stage IV? Positive cytology on lavage of the peritoneal cavity performed du
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